Art on the Nanoscale and Beyond

Abstract

Methods of forming and patterning materials at the nano- and microscales are finding increased use as a medium of artistic expression, and as a vehicle for communicating scientific advances to a broader audience. While sharing many attributes of other art forms, miniaturized art enables the direct engagement of sensory aspects such as sight and touch for materials and structures that are otherwise invisible to the eye. The historical uses of nano-/microscale materials and imaging techniques in arts and sciences are presented. The motivations to create artwork at small scales are discussed, and representations in scientific literature and exhibitions are explored. Examples are presented using semiconductors, microfluidics, and nanomaterials as the artistic media; these utilized techniques including micromachining, focused ion beam milling, two-photon polymerization, and bottom-up nanostructure growth. Finally, the technological factors that limit the implementation of artwork at miniature scales are identified, and potential future directions are discussed. As research marches toward even smaller length scales, innovative and engaging visualizations and artistic endeavors will have growing implications on education, communication, policy making, media activism, and public perception of science and technology.

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REVIEW
Art on the Nanoscale and Beyond
Ali K. Yetisen ,* Ahmet F. Coskun , Grant England , Sangyeon Cho , Haider Butt ,
Jonty Hurwitz , Mathias Kolle , Ali Khademhosseini , A. John Hart , Albert Folch ,
and Seok Hyun Yun*
1. Historical Signifi cance
1.1. Use of Nanomaterials in Arts
For centuries, artists have made clever
use of materials science and technology.
The fi rst-known artistic expressions
by humans, cave paintings, must have
required scientifi c planning and experi-
mentation to produce the pigments used.
Recently, hand stencils from Sulawesi,
Indonesia have been found to date back at
least 40 000 BCE, which predates art from
European caves ( Figure 1 a). [ 1 ] In 34 000
BCE (Upper Paleolithic), in the Chauvet-
Pont-d’Arc Cave, prehistoric humans
created hand stencils and drew wild mam-
mals using charcoal and pigments on the
cave walls.
[ 2 ] Without their knowledge,
they deposited layers of graphene and
nanocomposites on the walls. The cave
paintings found throughout the Pleisto-
cene Eurasian world also contained poly-
chrome rock paintings of other animals,
Methods of forming and patterning materials at the nano- and microscales
are fi nding increased use as a medium of artistic expression, and as a
vehicle for communicating scientifi c advances to a broader audience. While
sharing many attributes of other art forms, miniaturized art enables the
direct engagement of sensory aspects such as sight and touch for mate-
rials and structures that are otherwise invisible to the eye. The historical
uses of nano-/microscale materials and imaging techniques in arts and
sciences are presented. The motivations to create artwork at small scales
are discussed, and representations in scientifi c literature and exhibitions
are explored. Examples are presented using semiconductors, microfl uidics,
and nanomaterials as the artistic media; these utilized techniques including
micromachining, focused ion beam milling, two-photon polymerization,
and bottom-up nanostructure growth. Finally, the technological factors
that limit the implementation of artwork at miniature scales are identifi ed,
and potential future directions are discussed. As research marches toward
even smaller length scales, innovative and engaging visualizations and
artistic endeavors will have growing implications on education, communica-
tion, policy making, media activism, and public perception of science and
technology.
DOI: 10.1002/adma.201502382
Dr. A. K. Yetisen, S. Cho, Prof. S. H. Yun
Harvard Medical School and Wellman Center for Photomedicine
Massachusetts General Hospital
65 Landsdowne Street , Cambridge , MA 02139 , USA
E-mail: ayetisen@mgh.harvard.edu; syun@mgh.harvard.edu
Dr. A. F. Coskun
Division of Chemistry and Chemical Engineering
California Institute of Technology
1200 East California Blvd , Pasadena , CA 91125 , USA
G. England
School of Engineering and Applied Sciences
Harvard University
9 Oxford Street , Cambridge , MA 02138 , USA
Dr. H. Butt
School of Mechanical Engineering
University of Birmingham
Edgbaston , Birmingham B15 2TT , UK
J. Hurwitz
Royal British Society of Sculptors
108 Old Brompton Road , London SW7 3RA , UK
Prof. M. Kolle, Prof. A. J. Hart
Department of Mechanical Engineering
Massachusetts Institute of Technology
77 Massachusetts Avenue , Cambridge , MA 02139 , USA
Prof. A. Khademhosseini
Biomaterials Innovation Research Center
Division of Biomedical Engineering
Brigham and Women’s Hospital
Harvard Medical School
Cambridge , MA 02139 , USA
Prof. A. Khademhosseini
Wyss Institute for Biologically Inspired Engineering
Harvard University
Boston , MA 02115 , USA
Prof. A. Khademhosseini
Department of Physics
King Abdulaziz University
Jeddah , Saudi Arabia
Prof. A. Folch
Department of Bioengineering
William Foege Bldg. 15th Ave NE
University of Washington
Seattle , WA 98195 , USA
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wherein yellow ochre, hematite, and manganese oxide, as well
as animal fat, were used to control the intensity of the pig-
ments.
[ 3 ] Figure 1 b illustrates the Horse Panel and wild animals
in the Chauvet-Pont-d’Arc Cave in France.
[ 4 ]
The human pursuit of imagination and beauty compelled
archaic artisans to search for and modify various nanomate-
rials with which they could create objects to satisfy curiosity
and provide a sense of aesthetics. An early example of nano-
material use in ancient artwork is the Roman Lycurgus Cup
(400 CE).
[ 5 ] This chalice was doped by naturally occurring silver
and gold nanoparticles, forming a dichroic fi lter that changes
color depending on illumination in refl ection or transmis-
sion. In Middle America, the inhabitants of the Mayan city of
Chichen Itza (800 CE) synthesized Maya Blue, which was a
corrosion resistant azure pigment (Figure 1 c).
[ 6a,b ] Maya Blue
consists of a mixture of nanoporous clay and indigo dye, which
form a hydrophobic pigment. In the Middle East, Damascus
steel swords (300–1700 CE) contained carbon nanotubes, and
cementite nanowires, which enhanced their strength and frac-
ture resistance.
[ 7 ] In North Africa, luster, which is a silver- and
copper-nanoparticle-based glassy mixture, was utilized in deco-
rative arts to produce iridescent metallic glaze. For example, the
upper part of the mihrab in the Great Mosque of Kairouan
(670 CE) in Tunisia is decorated with mono/polychrome luster-
ware tiles.
[ 8 ]
The alchemists of medieval Europe employed water and
fi re to change the optical, chemical, and physical properties of
materials.
[ 9 ] During the Renaissance (1450–1600 CE), cerami-
cists from Deruta in the Umbria region in Italy produced silver
and gold nanoparticles in their glazes.
[ 8,10 ] The glass windows
of medieval cathedrals (6th to 15th centuries) were stained with
gold nanoparticles and metal oxides to produce rich colors and
tones (Figure 1 d).
[ 11 ] Copper oxide nanoparticles were added
to glass to produce a green hue; gold was added for red color,
silver was used for yellow tones, and cobalt gave blue colora-
tion. In particular, the manipulation of optical properties of
materials, including gloss and visual texture, were important to
artists and craftsman, but they were not aware of the under-
lying nanoscale processes.
1.2. Scientifi c Photography and Imaging Techniques
Experimentation with camera obscura, a box with a pinhole
that projects images by scaling down and rotating, began in the
ancient world. However, it was not until 17
th century that port-
able camera obscura models were developed.
[ 12 ] In 1694, the
photochemical effect was discovered by Wilhelm Homberg.
[ 12 ]
A transition between trial-and-error material manipulation and
scientifi cally guided understanding was marked by the inven-
tion of wet-chemistry-based photography in the early 19th cen-
tury. Nicéphore Niépce developed the fi rst photolithography
technique in the 1820s when he created an image using a
camera obscura.
[ 13 ] Niépce’s technique involved photopolym-
erization (>8 h) of bitumen over a pewter plate.
[ 13,14 ] In 1839,
Niépce’s process was replaced by Louis Daguerre’s fast photo-
graphic “daguerreotype” process involving the formation of a
latent image in a silver-halide-containing plate, which was sub-
sequently exposed, developed, and fi xed.
[ 15 ] In 1840, William
Ali K. Yetisen received his
Ph.D. degree from the
University of Cambridge in
2014. He researches nano-
technology, photonics, com-
mercialization, government
policy & regulations, and
arts. His work has received
international media coverage.
He has taught biotechnology
and entrepreneurship courses
at Harvard University and
University of Cambridge. He has served as a policy advisor
in the British Cabinet Offi ce.
Seok-Hyun (Andy) Yun
received his Ph.D. degree in
physics from Korea Advanced
Institute of Science and
Technology in 1997. His
thesis research led to a
startup company in Silicon
Valley, where he managed
engineering to productize
fi ber-optic devices for tel-
ecommunications. Currently,
he is an Associate Professor
and Director of Bio-Optic Lab at Harvard Medical School
and Massachusetts General Hospital, an affi liated faculty
of the Harvard–MIT Health Sciences and Technology,
and the Director of the Harvard–MIT Summer Institute
for Biomedical Optics. His research areas include optical
imaging, photomedicine, biomaterials photonics, and
biological lasers.
Talbot invented the paper-based calotype, which allowed
production of negatives that could be used to make positive
copies.
[ 16 ] In 1842, John Herschel proposed the cyanotype pro-
cess, which enabled creating images with cyan-blue prints.
[ 17 ] In
1851, Frederick Archer developed the wet-plate collodion pro-
cess, which combined the desirable qualities of the daguerre-
otype (sharpness and quality) and the calotype (printing from
a single negative) by allowing the creation of negative images
on a transparent glass.
[ 18 ] Two decades later, in 1871, Richard
Maddox reported gelatin-based silver-halide chemistry, which
became the standard emulsion for black-and-white photo-
graphy.
[ 19 ] In 1890, the light sensitivity of photographic fi lms
was quantifi ed by Ferdinand Hurter and Vero Driffi eld.
[ 20 ]
Eventually, the fi rst photographic roll fi lm was commercial-
ized by Kodak in 1885. In 1891, color photography was demon-
strated by Gabriel Lippmann
[ 21 ] involving interference of light
based on Wilhelm Zenker’s theory of standing waves
[ 22 ] and
Otto Wiener’s experimental work on standing electromagnetic
waves.
[ 23 ] The invention of photography allowed “the moment”
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to be captured in greater detail than achievable with traditional
media including painting and sculpture. Consequently, many
artists have embraced photography as a form of fi ne art created
by the vision of the cameraman, who aimed to produce a per-
sonal impression rather than merely capturing a realistic repre-
sentation of the subject. Photography as a fi ne art was accepted
in both Europe and the United States in the late 19th century.
[ 24 ]
Early artists included Alfred Stieglitz and Edward Steichen.
[ 25 ]
Fine-art photography evolved further by movements such as
Photo-Secession,
[ 26 ] the Linked Ring,
[ 27 ] avant-garde art,
[ 28 ] and
pictorialism.
[ 29 ]
The use of photography in sciences began after the inven-
tion of the daguerreotype process, which was fi rst used by
astronomers to capture images of the sun and of a solar eclipse
in the 1850s.
[ 30 ] In the late 19th century, paper-based pho-
tographs started appearing in scientifi c journals and books.
In The Expression of the Emotions in Man and Animals
(1872), Charles Darwin collaborated with photographer Oscar
Rejlander to produce one of the fi rst books containing photo-
graphs with heliotype plates.
[ 31 ] An early use of photo graphy
in scientifi c experiments was demonstrated by Eadweard
Muybridge in 1878.
[ 32 ] Muybridge took 24 successive photo-
graphs of a galloping horse. He used a zoopraxiscope to project
the images in order to understand whether a galloping horse
lifted all four feet off the ground during a gait. Muybridge’s
photography contributed to the development of biomechanics
as a scientifi c fi eld. In the 1930s, Harold Edgerton used a
strobe light fl ash to create high-speed still shots of a drop of
milk splashing into a glass, a hummingbird fl apping its wings,
a bullet passing through an apple, and many other captivating
scenes.
[ 33 ] In 1952, Rosalind Franklin utilized X-ray crystallog-
raphy and photography to reveal the structure of deoxyribonu-
cleic acid (DNA).
[ 34 ] Since then, advances in optics, cameras,
and light sources have allowed scientists to produce images
with increasing resolution and color fi delity.
Further technological advances in scientifi c imaging include
the development of electron microscopy and atomic force
microscopy, which have enabled the characterization and engi-
neering of structures at the nano- and microscale. The inven-
tion of electron microscopy was a signifi cant milestone in the
enhancement of imaging capabilities.
[ 35 ] In 1927, Hans Bush
proposed the lens formula that showed the focusing effect of
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Figure 1. Art in the ancient world and medieval ages. a) Hand stencil from Maros on the island of Sulawesi in Indonesia (40 000 BCE). Scale bar = 10 cm.
Reproduced with permission.
[ 1 ] Copyright 2014, Macmillan Publishers Ltd. b) The Horse Panel and wild animals in the Chauvet-Pont-d’Arc Cave in France
(36 000 BCE). Reproduced with permission.
[ 6c ] Copyright 2011, Jean Clottes, published by American Medical Association. Scale bar = 1 m. c) Maya Blue
on a mural showing warrior from Bonampak, Mexico (580–800 CE). Reproduced with permission.
[ 6a ] Copyright 2004, The Royal Society of Chemistry (RSC)
on behalf of the Centre National de la Recherche Scientifi que (CNRS) and the RSC. d) Panel 8e from the Great East Window (1405–1408) at York Minster,
showing the Army of the Horsemen, described in Revelations ix: 16–19. Scale bar = 10 cm. Reproduced with permission.
[ 11b ] Copyright 2014, Elsevier.

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a rotationally symmetric magnetic fi eld.
[ 36 ] In the same year,
George P. Thomson and Bell Laboratories demonstrated elec-
tron diffraction.
[ 37 ] Max Knoll and Ernst Ruska built the fi rst
two-state electron microscope with a 16× magnifi cation and
verifi ed the lens formula in 1931.
[ 38 ] The electron microscope
was patented by Siemens AG.
[ 39 ] Later on, Ruska improved the
magnifi cation up to 12 000×.
[ 40 ] The fi rst scanning electron and
transmission microscopes were constructed by Manfred von
Ardenne in 1938.
[ 41 ] Siemens commercialized the fi rst serially
produced transmission electron microscopes with a resolution
of 7 nm operated at 70 kV in 1939.
[ 42 ] The spatial variation from
these electron microscopes was recorded by exposing a silver
halide photographic fi lm to the electron beam, or projecting the
electron image onto a fl uorescent screen coated with phosphor
or zinc sulfi de.
[ 43 ] In 1981, the discovery of scanning tunneling
microscopy by Gerd Binning and Heinrich Rohrer at IBM ena-
bled the imaging of surfaces with 0.1 and 0.01 nm lateral and
depth resolution, respectively.
[ 44 ] In 1986, the development of
atomic force microscopy by Binning allowed imaging with sub-
nanometer resolution.
[ 45 ]
The advent of computers also changed the way we think
of art and data storage. Alan Turing, the fi rst computer pro-
grammer in history, became also the fi rst known scientist to
use computers for artistic purposes.
[ 46 ] In 1950, while working
at the Manchester Computer Machine Laboratory, Turing
decided to program musical tunes as user-friendly warning
systems. His colleague Christopher Strachey picked up on this
idea to program the fi rst conventional piece of music (“God
Save the King”) in 1951, which was broadcast by the British
Broadcasting Corporation (BBC). Strachey also wrote the fi rst
computer game (a game of checkers), creating what became the
fi rst screen representation of a real object – many years before
the fi rst digital cameras were invented.
[ 46 ]
While silver-halide photography was based on nanomate-
rials, bottom-up approaches to pattern nanomaterials had not
been developed at that time. However, advances in integrated
circuits and decreasing costs in semiconductors in the 1970s
represented a new platform to create rewriteable photographic
images that could be modifi ed with computers. The develop-
ment of digital cameras has revolutionized photography. The
origins of digital photography date back to 1970 when charge-
coupled devices (CCD) were fi rst developed at Bell Labs.
[ 47 ]
George Smith and Willard Boyle invented a solid-state video
camera that allowed the capture of images of high enough
quality to allow for broadcasting on television. However, it
was not until 1981 that the fi rst digital-magnetic video camera
(Mavica, Sony Corporation) entered the consumer markets.
Mavica captured images using a CCD sensor, and recorded
images (720 000 pixels) as magnetic pulses on 2.0” diskettes.
[ 48 ]
In 1986, Kodak reported the fi rst megapixel sensor, which was
capable of recording 1.4 megapixels (MPs). Several years later,
Kodak released the fi rst digital camera system (DCS 100) that
incorporated a Nikon F-3 camera and a 1.3 MP sensor for use
in photojournalism.
[ 49 ] However, the fi rst fully-digital consumer
camera (Dycam Model 1) was introduced to the markets in
1990 by Logitech.
[ 50 ] Dycam Model 1 captured images with a
fi xed-focus lens (8 mm) and a 376 × 240 pixel CCD camera
at 256 shades of gray, recording them on a 1 megabyte (MB)
random-access memory (RAM) in tagged image fi le format
(tiff). In 1994, low-cost cameras such as QuickTake 100 (Apple)
with 640 × 480 pixels were introduced to the consumer mar-
kets.
[ 51 ] In subsequent years, the miniaturization of digital
components allowed Kodak, Nikon, Toshiba, and Olympus to
produce smaller cameras for incorporation in scientifi c instru-
ments. Digital photography has created a medium to capture
and post-process images, opening up opportunities for science
communication and other applications. For instance, the incor-
poration of digital cameras into microscopes, permitting the
visualization of nano-/microscale material morphologies and
processes, has provided the capability of capturing images at
low light levels, and allowed for intracellular imaging.
[ 52 ] The
advances from photography to the electron and atomic force
microscopy have set the stage for producing and imaging struc-
tures at the nano-/microscale for the visualization of science,
creating a new medium for artistic expression.
1.3. Convergence of Art and Science
The domains of art and science have traditionally been sepa-
rate, both by the creators of content and by their educators.
Although Renaissance humanists, with Leonardo being their
most famous example, took exception of this view, scientifi c and
artistic methodologies are typically taught separately from our
early childhood as disparate disciplines. In 1959, Charles Snow
stated that the intellectual composition in the western society
was split into two cultures: literary intellectuals and the natural
scientists.
[ 53 ] He expressed that the great divide between these
cultures was a major hindrance to improve humanity. Indeed,
the two cultures have distorted images of themselves and there
exists a lack of understanding and little common ground. How-
ever, the arts offer the sciences an essential store of images,
ideas, metaphors, and language. The Copy Principle of David
Hume states that the scientifi c understanding cannot always be
arrived by experimental approaches but sometimes must origi-
nate in the mind.
[ 54 ] For example, atomic physicist Niels Bohr
imagined the invisible nucleus of an atom as an oscillating drop
of liquid. Similarly, the standing waves in the early days of wave
theory of light were conceived as vibrating strings. These meta-
phors originate from sensual experience and from the vocabu-
lary derived from arts and humanities. Hence, the combination
of social and physical sciences is necessary for the recognition
and synthesis of different thinking approaches.
[ 55 ]
Creative interactions between scientists and artists, or the
engagement in art by scientists, have been infrequent and are
still gaining recognition. In response to this situation, many
organizations have initiated programs to bring together artists
and scientists to spark collaboration, and to encourage science
visualization as a means of public engagement ( Table 1 ). An
early example is the Leonardo journal (MIT Press), which was
established by Frank Malina in 1968, featuring articles on the
application of science and technology to the arts and music. In
1982, the International Society for the Arts Sciences and Tech-
nology was established to expand the operations of the journal
to conferences, symposia, and workshops. Many prominent
academic initiatives promote the intersection of art and science.
In 2000, the University of Western Australia established Symbi-
oticA, which is an art program that engages the public with the
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uses of biology to encourage critical thinking and raise aware-
ness about ethical concerns in biotechnology research, in par-
ticular through tactical media. The Art/Sci Center at the Univer-
sity of California (Los Angeles) is an initiative affi liated with both
the School of the Arts and the California NanoSystems Institute
(CNSI). It promotes collaboration in between media arts and
bio-/nanosciences, organizes events and exhibitions, and offers
an artist-in-residence program. Since 1975, Nikon has featured
the “Small World” art program, which is a forum for showcasing
complexity at the nano-/microscale through its photomicro-
graphy and movie competitions. The imaging techniques in
these competitions include light microscopy with fl uorescence,
phase and interference contrast, polarization, dark-fi eld, con-
focal, deconvolution, and combination of these techniques.
Via the self-organization of artists and scientists, and crea-
tion of numerous interdisciplinary initiatives has emerged as a
new discipline, which is referred to herein as “art on the nano-
and microscale”. Creation of nano-/microscale art involves
i) intentional fabrication of a structure by controlling the organ-
ization of the materials using chemical reactions or physical
processes, or by the discovery of natural nano-/microstructures,
ii) visualization of the nano-/microstructures using micro-
scopy, iii) artistic interpretation and manipulation of the cre-
ated images and/or structures to tell a story, convey a feeling, or
communicate a message, often involving digital modifi cations
such as coloring, collage, or assembly of multiple images, and
iv) showcasing the artwork via the internet or in exhibitions or
installations. The motivation to create nano-/microscale art-
work may include spurring creativity, conveying a message or
feeling, showing a technological capability, demonstrating a
physical principle, enhancing understanding of a technology, or
creating attractive images.
In this Review, nano-/microscale art created using semicon-
ductors, polymers, microfl uidic devices, other carbon-based
materials, and biological interfaces are discussed. Artwork
fabrication techniques such as focused ion beam milling,
laser-directed two-photon polymerization, soft lithography,
nanopatterning, and protein/cell micropatterning are summa-
rized. Microphotography in life sciences is also described as
an emerging art fi eld. Furthermore, the implications of such
artwork in physical and natural sciences in creativity, imagina-
tion, communication, language, and the promotion of science
and technology are explained. The discussion is concluded by
showing the benefi ts of nano-/microscale art for the public, and
outlining potential future directions.
2. Microscale Art
Contrasting the unintentional use of materials in historical
artifacts, we now have the scientifi c knowledge and technical
capabilities to microengineer art. The creation of microscale
art began due to the advances in photolithography and inte-
grated circuits. Recently, microscale artwork has expanded to
soft lithography, where fl uids are controlled to draw images of
iconic structures or create abstract visualizations. These art-
works represent social trends, cultural values, storytelling, self-
expression, and beauty and emotion.
2.1. Semiconductor Artwork (Chip Graffi ti)
An earlier example of intentional incorporation of art in micro-
fabricated devices date back to the emergence of semiconductor
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Table 1. Selected initiatives and programs combining science and art.
Initiative Program Description Founded
Leonardo Society An international society for the arts, sciences, and technology 1968
Nikon’s Small World A competition for photomicrography 1975
SymbioticA A research center for bioart at the University of Western Australia 2000
NanoArt 21 Founded by Cris Orfescu, an organization for nanoart competitions, festivals, and exhibitions 2004
UCLA Art|Sci Center+LAB A center to promote the integration of arts and bio/nano sciences 2005
MRS Science as Art A competition for aesthetic scientifi c images at the nano-/microscale 2006
Bringing Art into Technology (BAIT) Folch lab outreach program to make scientifi c disciplines accessible through artistic manipulations of micros-
copy images
2007
Roche Continents A summer program that brings together art and science students across Europe to learn about arts and
creativity
2007
Le Laboratoire Paris/Cambridge An organization dedicated to the development of radical ideas, and provide educational programs 2007
ArtScienceLabs at Harvard Founded by David Edwards, an international network of labs focusing on educations programs for art and
science
2008
µTAS Art in Science Contest A contest for art-on-a-chip images 2008
Art of Science at Caltech A contest for images at the nano-/micro/macroscale 2008
ArtSciLabs at UT Dallas Directed by Roger Malina, a program that promotes collaboration between artists and scientists for creating
artworks, scientifi c data analysis tools, a technology test-bed. It also develops activities involving the integration
of the arts, design and humanities in science, technology, education and mathematics (STEAM).
2013
xREZ Art + Science lab at UNT Coordinated by Ruth West, a creative studio and research program to forge productive paths from the intersec-
tion of the arts, sciences and humanities to open new portals of imagination, knowledge and communication
2013

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industry in the 1970s. “Chip graffi ti” was conceived and imple-
mented so that designers of semiconductor chips could place
a creative touch on their work, and discourage the plagiarism
of their designs.
[ 56 ] These markings included chip designer’s
names, renderings of favorite pets, cartoon characters, and
were particularly found in chips made in the US and Europe
(in particular Germany), yet they were less prevalent in Japa-
nese-made chips. At that time, artworks on the chip served
a useful purpose since they were used as evidence to reveal
counterfeiting.
Chip graffi ti were found on chips manufactured by semi-
conductor companies such as HP, IBM, Motorola, Texas
Instruments, Advanced Micro Devices, Western Digital, Phil-
lips, Cypress Semiconductor, Intel, STMicroelectronics, and
Siemens. One of the early chip graffi ti was designed by the
former HP chip designer Willy McAllister and his team, and
fabricated using the late Silicon-on-Sapphire technology in
the 1970/80s.
[ 56 ] This graffi to consisted of a visual pun on the
adder logic circuits on the HP 1000 Tosdata 64-bit fl oating
multiplier. The graffi to had adders (summer in a digital cir-
cuit), and engorged snakes with swollen stomach, where the
“adder” was also the name for a venomous snake ( Vipera berus ).
The team also created an early chip graffi to that illustrated a
“running cheetah” on the early HP-PA microprocessor in the
HP-900/750/755 series computers. The design was inspired
from the image on the cover of the September 1986 IEEE Com-
puter magazine.
[ 57 ]
Chip graffi ti were infl uenced by lifestyle trends, cartoon
characters, television, nature, and rivalry. Mr. T from the action-
adventure television series the A-Team (1983–1987) was fea-
tured on a single-chip “T1” transceiver integrated circuit (DS2
151Q single chip, Dallas Semiconductor). The 50 µm-wide wire-
frame version of Daffy Duck was found on a reduced instruction
set computing (RISC) microprocessor. Chip design engineers at
Siemens designed an integrated circuit (M879-A3) containing a
wagon-pulling 60 µm-tall Smurf, which was originally created
by Belgian cartoonist Pierre Culliford (Peyo). In the early 1970s,
Mickey Mouse (Walt Disney) was featured on Chip Graffi ti in
a Mostek 5017 alarm clock integrated circuit, where he points
to 12 and 7 creating a clock. Milhouse Van Houten, a character
featured in the television series the Simpsons (1989 to pre-
sent) was found on a Silicon Image Sil154CT64 digital trans-
mitter integrated circuit. Another cartoon character in the Road
Runner Show (Warner Bros.) premiered on television in 1966
was etched on a HP 64-bit combinatorial multiplier integrated
circuit. An HP design team headed by Howard Hilton in Lake
Stevens, Washington designed an osprey ( Pandion haliaetus )
on a decimation fi lter integrated circuit utilized in signal ana-
lyzer instruments, which was produced by John Guilford. Chip-
design engineers (Charlie Spillman) at HP also paid tribute
to Lassie, a rough collie dog character featured in television
from 1940–1990s. Her miniaturized version was found on an
HP support chip removed from a motherboard containing PA-
7100LC chipset (1994). The codename for this project was LASI
derived from a Local Area Network (LAn) interface and a Small
Computer System Interface (scSI) port. Additionally, a Marvin
the Martian character, designed by Mark Wadsworth and Tom
Elliot, was illustrated on a CCD image sensor used by the Spirit
and the Opportunity rovers sent to explore Mars in 2003.
The motivation to create chip graffi ti decreased after the US
congress passed the Semiconductor Chip Protection Act (1984),
which made copying the identical working parts of the chip a
copyright violation.
[ 58 ] This act made the purpose of having a
graffi to on a chip redundant. The incorporation of chip art in
current semiconductors is also discouraged by the automation
of the circuit design process, and the risk that complex patterns
can cause data processing errors, which can delay a product
cycle.
[ 59 ] Due to the risk factors, HP banned logos in its fabrica-
tion plants in 1994.
[ 60 ] However, chip designers in other compa-
nies continued to create art on semiconductors. Chip graffi ti is
still found on 1 in 10 chips currently produced.
[ 56 ] Hence, the
introduction of copyright laws, the automation of chip manu-
facturing, and the technical changes around chip design have
signifi cantly decreased the number of chip graffi ti. Neverthe-
less, the chip graffi ti featuring the copy of popular characters
or original designs represent an appreciation for the artistic
expression at microscale.
2.2. Microfl uidic Artwork
Microfl uidic devices consist of channels that allow the move-
ment of fl uids for the investigation of transport phenomena
and applications such as high-throughput analyses.
[ 61 ] The
visualizations of microfl uidics can be created by wetting chan-
nels with colored fl uids to show the principles of laminar or
turbulent fl ows. Some of the earliest visually appealing images
in microfl uidics were created by Felice Frankel and George
Whitesides, including the cover of a September 1992 issue of
Science, to illustrate scientifi c principles.
[ 62 ] Figure 2 a shows
drops of water (blue and green) organized into square regions
(4 mm × 4 mm) that are separated by hydrophobic bounda-
ries. The same journal’s 1999 July issue illustrated a graphical
abstract that consisted of multiple channels fl owing different
dyed solutions.
[ 63 ] As the channels merged, their fl uids main-
tained parallel laminar fl ows (Figure 2 b). Additionally, Frankel
and Whitesides have authored books that presented examples
of visualization at the nano-/microscale and described how
images could be designed to engage audience and enhance
communication.
[ 64 ]
Albert Folch and his colleagues created visually appealing
microfl uidic devices that were colored with different dye solu-
tions, and digitally modifi ed to obtain a vibrant collection
of images (Figure 2 c,d). Folch’s team also created dynamic
microfl uidics videos, in which the fl ow rate and the dyed solu-
tions in the channels were mediated by the rhythm of the
music played. Another creator of visually-appealing microfl u-
idic devices, Tanner Neville, conceived the idea while he was
developing a technique to pattern proteins on substrates.
[ 65 ]
Figure 2 e shows a microfl uidic device resembling the Golden
Gate Bridge, created by Neville and Albert Mach. Preparing
poly(dimethylsiloxane) microfl uidic devices with a strong
vacuum prior to fi lling the channels allowed for easy fi lling of
long dead-end channels. Organic dyes were added to a UV cur-
able epoxy resulting in permanent colors. The Campanile (Uni-
versity of California, Berkeley) as a microfl uidic device was also
depicted by Neville and Austin Day (Figure 2 f). The Campa-
nile was fabricated by soft lithography and consisted of 6 fl uid
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channels with dead-ends fi lled with different colors of dyes.
Another contributor to microfl uidic art was Ran Drori, who
formed ice crystals in microfl uidic devices. Figure 2 g shows
a microfl uidic chip for studying ice-binding proteins using a
cold stage on an inverted microscope. When the temperature
was reduced suddenly, dendritic ice growth in the microfl uidic
channels was observed.
[ 66 ] Figure 2 h illustrates a microfl uidic
device entitled “The Sphere” by David Castro and David Con-
chouso, providing an impression of a celestial body as seen
through the window of a futuristic spacecraft.
[ 67 ] The image
was created from a droplet (40 µL) hanging between two fl uids
in a cuvette. This droplet was formed between a layer of per-
fl uorohexane and mineral oil, and it consisted of agglutinated
latex beads mixed with human C-reactive proteins.
Visually appealing images were also created to demonstrate
complexity and self-assembly, or show capabilities to con-
trol chemical and physical processes. Research on microfl u-
idic fabrication of complex microparticles and their assembly
has offered appealing visualizations that suggested an artistic
approach while demonstrating key underlying concepts. For
Adv. Mater. 2016, 28, 1724–1742
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Figure 2. Microfl uidic artwork. a) Dyed water droplets separated by hydrophobic boundaries. Reproduced with permission.
[ 62 ] Copyright 1992, Felice
Frankel, published by The American Association for the Advancement of Science (AAAS). Scale bar = 1 mm. b) Science 1999 July issue featuring a
microfl uidic device from the Whitesides group. Seven channels colored with different dye solutions converge in a single channel and move in parallel
laminar fl ow. Reproduced with permission.
[ 63 ] Copyright 1999, Felice Frankel, published by AAAS. c) The “Chromatic Labyrinth” collage was created from
a culture chamber that allowed growing cells under controlled conditions. The collage was formed by changing the hue of the original image. Image
provided by David Cate and Albert Folch and reproduced with permission.
[ 139a ] Scale bar = 200 µm. d) “The Color of Viscosity” was created by fl owing
aqueous dextran at different fl ow rates in the microchannels, and the colors were digitally added to the photographs. Image provided by Chris Sip and
Albert Folch and reproduced with permission.
[ 139a ] Scale bar = 500 µm. e) The Golden Gate Bridge. Image provided by and used with permission of
Albert Mach and Tanner Nevill. Scale bar = 500 µm. f) The Campanile (University of California, Berkeley). Image provided by and used with permission
of Austin Day and Tanner Nevill. Scale bar = 1 mm. g) Ice Crystals Growth in Microfl uidics. Reproduced with permission.
[ 139b ] Copyright 2014, Ran
Drori. Scale bar = 100 µm. h) The Sphere. Reproduced with permission.
[ 67b ] Copyright 2015, Royal Society of Chemistry, and David Castro and David
Conchouso. Scale bar = 1 mm. i) Superparamagnetic colloidal nanocrystal dices assembled in a microfl uidic device. Scale bar = 500 µm. Reproduced
with permission.
[ 68 ] Copyright 2010, Macmillan Publishers Ltd. j) Complex self-assembly in railed microfl uidics. The channel and groove depths are 37
and 41 µm, respectively. Reproduced with permission.
[ 69 ] Copyright 2008, Macmillan Publishers Ltd.

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example, particles created from a mixture of superparamagnetic
colloidal nanocrystal clusters and photocurable monomer solu-
tion resembled microscopic dice with colored spot patterns.
[ 68 ]
The microparticles refl ected light of patterned colors that
resulted from the control of the spacing between the colloidal
superparamagnetic nanocrystals (Figure 2 i). When magnetic
fi eld was varied, the color of the ink changed. By using litho-
graphy and UV-initiated polymerization, the colors (5–200 µm)
could be fi xed over the particle surface. The particles could be
spun and functioned as stirring bars for chemical reactions.
Another fabrication technique involved particle assembly of
microscale components using railed microfl uidics to create visu-
ally appealing images.
[ 69 ] In this method, structures were guided
in the microfl uidic channels that consisted of grooves as rails on
the top surface. Some of the microfl uidic grooves were designed
to specifi cally fi t to polymeric microstructures. Hence, this
mechanism allowed for the construction of 2D/3D microsys-
tems by fl uid-controlled self-assembly. Using railed microfl uidic
channels, an image of a Greek temple was created (Figure 2 j).
3. Nanoart
The capability of controlling the color, shape, and structure by
the physics of material formation, interaction, and assembly
represents an new medium of artistic expression.
[ 3 ] Capturing
images of nanostructures has also provided many engaging sci-
entifi c visualizations with similarities to macroscale life forms
and man-made structures. The aim of nanoart has primarily
been to demonstrate new nanofabrication methods to create
engaging visualizations that show the intricate capabilities of
the fabrication technology. However, the themes of the promo-
tion of science and technology to the public, media activism,
and cultural attributes have also emerged. The installed exhibi-
tions included interactive experiences that have allowed audi-
ence to touch, hear, and see responsive artwork.
3.1. Lithographic Writing of Artwork
An early example of artwork at the nanoscale was created by
Alessandro Scali and Robin Goode in collaboration with Fab-
rizio Pirri from the Polytechnic University of Turin. The team
created an artwork showing a map of Africa, entitled Actual
Size in 2007 ( Figure 3 a). The pattern was etched through oxi-
dative lithography on a silicon wafer using a 10 nm-wide tip
of an atomic force microscope.
[ 70 ] In Actual Size, the team
wanted to draw attention to the current status of Africa, which
is anthropologically signifi cant and has vast lands, but is poor,
exploited, and neglected. Hence, the notion of being unrec-
ognized, unexplored, and invisible was represented at the
nanoscale. Figure 3 b illustrates a fi eld-effect scanning electron
microscopy image of another artwork called Probation, which
was fabricated using silicon-on-insulator technology.
[ 71 ] The
geometry of the artwork was defi ned using a positive photo-
resist on a layered silicon-insulator substrate using optical
lithography, and subsequent removal of the bulk silicon
through anisotropic etching. The geometry of the statue on
the remaining layer was created by reactive ion etching of sil-
icon. Finally, the buried oxide solution was eliminated using
hydrofl uoric acid. The Statue of Liberty is an icon of freedom;
however, Scali wanted to express the idea that liberty was lim-
ited by constructing the statue at microscale.
[ 72 ] Exhibited at
BergamoScienza festival in Italy, these artworks utilized nano-
technology as a functional and enabling means of expression
to enhance the message.
Focused ion beam milling (FIBM) is a lithographic fabrica-
tion technique used for creating artwork. As an established
technique in the semiconductor industry, FIBM involves selec-
tive ablation of materials with nanoscale accuracy using liquid-
metal ion beams at high primary currents.
[ 73 ] An early use of
FIBM for art can be identifi ed in Rafael Lozano-Hemmers’s
work entitled “Pinches Pelos”. The artist’s gold-coated hair was
engraved with words using FIB milling. This microfabricated
artwork was displayed at Bitforms gallery (New York City)
in 2013. Artists Marcelo Coelho and Vik Muniz also utilized
FIBM to draw images on sand grains. The motivation of this
work was to question perspectives about the physical world.
[ 74 ]
Sandcastles were drawn by Muniz using camera lucida, an
optical device that allowed superpositioning of the object being
viewed upon the surface of the drawing.
[ 75 ] The sandcastle
images were drawn on a sand grain by FIBM (Figure 3 c). This
allowed the object to be represented on the material from
which the object was made. The use of camera lucida and
microfabrication represented the developments before and
after photography, highlighting the role of photography in
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Figure 3. Microfabricated artwork by focused ion beam milling (FIBM). a) Actual Size. Scale bar = 100 nm. Reproduced with permission.
[ 70b ] Copyright
2007, Macmillan Publishers Ltd. b) Probation. Scale bar = 100 µm. Reproduced with permission.
[ 139c ] Copyright 2007, Alessandro Scali and Robin
Goode. c) Sandcastle draft of Eltz Castle (Germany) on a sandgrain. Single pixel resolution = 50 nm, single line = 0.4–1.0 µm, scale bar = 50 µm.
Reproduced with permission.
[ 139d ] Copyright Marcelo Coelho and Vik Muniz.

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simulating reality. The artists’ project was displayed at Tel Aviv
Museum of Art in 2014, as part of a comprehensive retrospec-
tive on the work of Muniz.
3.2. Two-Photon Polymerization of Artwork
Two-photon polymerization (TPP) involves spatial-resolution
controlled 3D photopolymerization of a UV-absorbing resin
within the focus depth of a near-infrared laser beam.
[ 76 ] The
speed of the polymerization stimulated by two-photon absorp-
tion is proportional to the square of the photon density at a
localized position in the resin. Microfabrication through TPP
can be used for creating artwork at subdiffraction-limited
resolution (150 nm).
[ 77 ] Figure 4 a illustrates a “bull” sculpture
(10 µm × 7 µm) produced by laser-light-directed photopolym-
erization of a light-sensitive precursor mixture, which might
consist of urethane acrylate monomers, oligomers, and photo-
initiators.
[ 78 ] For example, to polymerize the monomer mixture,
a Ti:Sapphire (Ti:Al
2 O 3 ) laser beam at 76 MHz and 780 nm
with a 150 fs pulse width could be used.
[ 78 ] The creators of the
“bull” sculpture were inspired from Fantastic Voyage, a 1966
science fi ction fi lm in which a medical team was shrunk to
microscopic size and travelled into a scientist’s body to repair
damage to the brain using laser light.
[ 79 ] The creators envisaged
that the bull could pull a drug carrier through the blood vessels,
create microscopic sensors, and templates for cell cultures and
3D computer memories.
[ 80 ] To show complex structures that
could be created by TPP, Nanoscribe GmbH (Germany) has
fabricated 3D microlandmarks from photosensitive materials
(Figure 4 b,c). The photosensitive material might consist of pen-
taerythritol tetraacrylate containing 4,4’-bis(diethylamino)ben-
zophenone photoinitiator (1.5 wt%). The Ti:Al
2 O 3 fs laser beam
(33 mW) could be scanned at 44 mm s
−1 over the photosensi-
tive material while moving the x – y axis by 0.5 µm to construct
the structures layer by layer.
[ 81 ]
Multiphoton lithography was utilized to microfabricate
sculptures by artist Jonty Hurwitz in collaboration with Stefan
Hengsbach at the Karlsruhe Institute of Technology and
Yehiam Prior at the Weitzmann Institute of Science. Hurwitz
took an image of a model (Yifat Davidoff) using photogram-
metry, and used this image to microfabricate a human sculp-
ture named “Trust” with nanoscale features (Figure 4 d). He
was also inspired from Antonia Canova’s work entitled “Psyche
revived by Cupid’s Kiss” (1787–1793, Louvre Museum), which
led to another microsculpture, entitled “Cupid and Psyche” (a
self-portrait of himself and Davidoff) (Figure 4 e). This work
represented the artist’s emotions toward Davidoff as his fi rst
Adv. Mater. 2016, 28, 1724–1742
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Figure 4. Nano-/microfabricated artwork by two-photon polymerization. a) Bull sculpture. Scale bar = 2 µm. Reproduced with permission.
[ 138 ] Copyright
2001, Macmillan Publishers Ltd. b) Eiffel Tower, Scale bar = 100 µm. Reproduced with permission.
[ 139e ] Copyright 2013, Nanoscribe GmbH. c) Taj Mahal,
Scale bar = 100 µm. Reproduced with permission.
[ 139f ] Copyright Nanoscribe GmbH. d) Human sculpture on a hair named “Trust”. Scale bar = 10 µm.
Image provided by Jonty Hurwitz and reproduced with permission.
[ 139g ] e) “Cupid and Psyche” on an ant head (assembled later) from novel Meta-
morphoses by Apuleius. Scale bar = 100 µm. Image provided by Jonty Hurwitz and reproduced with permission.
[ 139g ] f ) A morningstar with a chain.
Scale bar = 10 µm. Reproduced with permission.
[ 82 ] Copyright 2013, Wiley-VCH.

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love. The sculpture was digitally assembled on an ant head to
put the size in perspective. According to Hurwitz, these micro-
scale artworks represented the moment in history that we were
able to create a human form at the same scale as the sperm.
The blend of art and science in these works was featured in a
range of art journals, newspapers, and television channels.
3D microscale protein-based objects with complex geom-
etries were also created using multiphoton lithography. Jason
B. Shear and his team at the University of Texas at Austin have
developed a high-viscosity protein-based reagent that allowed
3D microstructures such as Möbius strips to be fabricated.
[ 82 ]
Figure 4 f shows a partially-constrained structure fabricated
from a BSA protogel, containing four chain links and an
18-point spiked star. The protein gel contained BSA in DMSO,
and rose Bengal in 2-[4-(2-hydroxyethyl)piperazin-1-yl]ethane-
sulfonic acid (HEPES)-buffered saline solution. The structure
was fabricated using a dynamic mask-based process, where
objects were represented as a range of images sequentially dis-
played on a digital micromirror device (DMD).
[ 83 ] A focused
(Ti:Al
2 O 3 ) laser beam was raster-scanned across the DMD in
planes to incrementally form the 3D structure along the optical
axis. Hence, these demonstrations represent the potential of
using protein-based materials in creating artwork.
3.3. Nanoparticle-Based Artwork
Nanoparticles as inks could be printed to create visually
appealing images. The sun is the symbol for gold, proposed
by the 17
th century alchemist Robert Fludd.
[ 84 ] An image of the
sun was printed by gold nanoparticles ( Figure 5 a). [ 85 ] Discrete
nanoparticles were organized deterministically on grooved sur-
faces using directed assembly. The nanoparticles were arranged
in predefi ned positions defi ned by the geometry of the tem-
plate. To create the image, silicon templates were molded in the
order of 1 cm
2 from hardmasters containing grooves (40 nm
to 10 µm). The mold was inked with a colloidal suspension,
and the wetting properties and the geometry allowed fi lling
the grooves. Finally, the particle assembly was contact printed
on plain substrates through tailored adhesion. The image con-
tained 20 000 gold nanoparticles (Ø = 60 nm) and printed in
12 min.
[ 85 ] This work represented an example of using nano-
technology in the context of alchemy to create a story to capti-
vate the reader’s attention.
Optical properties of materials can be used to demon-
strate scientifi c principles, or attract readers. For example,
attention-catching images were created from quantum dots
that exhibited size-dependent emission properties.
[ 86 ] Mono-
disperse CdSe quantum dots were produced by the pyrolysis
of organometallic precursors including dimethylcadmium and
trioctylphosphine selenide in a coordinating solvent containing
trioctylphosphine oxide (TOPO).
[ 87 ] The dots were fi ltered out as
powders using size-selective precipitation, followed by growing
a shell using diethylzinc (ZnEt
2 ) and hexa methyldisilathiane
((TMS)
2 S) as the zinc and sulfur precursors. Photographed by
Felice Frankel, Figure 5 b shows a series of vials with lumines-
cent CdSe/ZnS nanocrystals (Ø = 2.3–5.5 nm) emitting light at
470, 480, 520, 560, 594, and 620 nm (left to right). Frankel’s work
with quantum dots contributes to thinking by producing explan-
atory images, developing creative ways to visually communicate
scientifi c fi ndings, and leveraging visual communication.
Another nanomaterial that has been used to create visually
appealing artwork is ferrofl uid. This magnetizable liquid con-
sists of surfactant-coated iron oxide nanoparticles (Ø < 10 nm)
suspended by Brownian motion. Carrier liquids contain mineral
and silicone oils, polyesters, polyethers, synthetic hydrocarbons,
and water.
[ 88 ] Sachiko Kodama began creating ferrofl uidic sculp-
tures in 2000. In “Protrude Flow”, she showed an interactive
ferrofl uidic artwork, in which the surface morphology and color
was changed dynamically.
[ 89 ] The ferrofl uid formed spikes along
magnetic fi eld lines as the magnetic surface force exceeded the
fl uid weight and surface tension. The shape of the sculpture
was transformed by changes in lighting, music, and the human
voice.
[ 90 ] Her work in kinetic and interactive art was inspired
from the geometry and the symmetry in nature. For example,
Morpho Towers (2006) featured ferrofl uidic standing spirals,
which were depicted as ocean and tornadoes.
[ 91 ] This idea was
based on the Japanese concept of “mitate” (juxtaposition), which
refers to mimicking natural phenomena, and it provides fresh-
ness and an element of surprise, producing an intriguing experi-
ence.
[ 92 ] Her ferrofl uidic artworks have been exhibited in media
art exhibitions, including the Museum of Contemporary Art,
Tokyo in 2010. Another artist, Fabian Oefner, created millefi ori-
like patterns using ferrofl uid and watercolors (Figure 5 c). When
watercolors were added to the ferrofl uid, they were confi ned
within the barriers of the ferrofl uid. This mixture formed black
channels and ponds that did not co-mingle due to the hydropho-
bicity of the ferrofl uid.
Adv. Mater. 2016, 28, 1724–1742
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Figure 5. Artwork with nanoparticles. a) Microscopy image of a sun composed of gold nanoparticles. Reproduced with permission.
[ 85 ] Copyright 2010,
Macmillan Publishers Ltd. Scale bar = 10 µm. b) Quantum dots. Reproduced with permission.
[ 139h ] Copyright 2012, Felice Frankel. Scale bar = 1 cm.
c) Millefi ori created from ferrofl uid. Reproduced with permission.
[ 139i ] Copyright 2012, Fabian Oefner. Scale bar = 5 cm.

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3.4. Nanoart for Broader Audiences
Recent uses of nanotechnology in art has shown the poten-
tial of visualizations to connect science with cultural and
political issues. The “Nanomandala” (2003) was an installa-
tion created by media artist Victoria Vesna in collaboration
with nanotechnologist James Gimzewski and sound artist
Anne Niemetz.
[ 93 ] The installation involved a disk of sand,
where various images were projected in evolving scale from
the molecular structure of a sand grain to an image of a com-
plete mandala. The sand mandala, an image of the symbol
that represented the universe in Buddhism, was created
by Tibetan Buddhist monks in collaboration with the Los
Angeles County Museum of Art. The installation was comple-
mented with a meditative soundscape that was derived from
the process of mandala making. Vesna was inspired from the
work of nanotechnologists, who purposefully arranged atoms
at the nanoscale, and its analogy to the work of monks, who
laboriously created mandalas grain by grain. Hence, these
two processes practiced in traditional cultures and modern
scientifi c communities represented a common ground cen-
tered around patience.
[ 94 ]
In 2008, A. John Hart and his colleagues created “Nano-
bama”, patterned structures of vertically aligned carbon nano-
tubes (CNTs) resembling Barack Obama. The work was based
on the artist Shepard Fairey’s “Hope” poster, which became
popular during the 2008 presidential election ( Figure 6 a). On
election day, Hart posted a series of images on the website
nanobama.com as well as the Flickr photo gallery, and accom-
panied the images with a description of CNT fabrication. This
description and the slogan “Vote for Science” were intended to
convey Nanobama as an example of nanotechnology, using a
popular image and news-making theme as the visual channel.
The number of CNTs in each of the microscopic Nanobama
structures was ca. 150 million, which was chosen to represent
the number of Americans who voted in the 2008 presiden-
tial election. The widespread media attention of Nanobama,
including newspapers, magazines, and academic journals indi-
cated how such a combination of emerging technology, pop-
ular interest, and engaging visualizations could help advance
public discussion of science. Media coverage used Nanobama
in several different ways: including as an introduction to stories
about the recent election, as a companion to perspectives on
science policy in the Obama administration, and as a lead-in to
the discussion of miniature artwork.
Nanoscale structures can capture the imagination of readers
when the images are presented in a context that the general
public understands. Wim Noorduin and colleagues utilized a
dynamic reaction-diffusion system to rationally grow elemen-
tary structures by controlling the diffusion of CO
2 in a solution
Adv. Mater. 2016, 28, 1724–1742
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Figure 6. Nanoart for broader audiences. a) Nanobama structures made of vertically aligned carbon nanotubes, Scale bar = 100 µm. Image provided
by A. John Hart and reproduced with permission.
[ 139j ] b) Biomimetic complex structures formed by self-assembly. Reproduced with permission.
[ 95 ]
Copyright 2013, AAAS. Scale bar = 25 µm. c) “Envisioning a Cornucopia of Nano-Neuro Innovations (1 to 100 nm) on the Horizon: From Bottom Up
to Top Down” (2011–2012) mixed media on synthetic canvas (porous inorganic material). Reproduced with permission.
[ 139k ] Copyright Ronald Feldman
Fine Arts, New York, NY, USA. Photographed by Lael Siler. Scale bar = 10 cm.

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REVIEW
of barium chloride and sodium metasilicate.
[ 95 ] By varying the
CO
2 concentration, pH, and temperature, a bouquet of hier-
archically assembled multiscale structures with different levels
of complexity was created. The SEM images of these struc-
tures were digitally colored and enhanced to resemble fl owers
(Figure 6 b). This work was featured in numerous magazines
and newspapers read by the general public. Hence, visually
appealing nanotechnology images in an easily understood con-
text represent a medium for creating a common ground, ini-
tiating media activism, intriguing imagination, and educating
the general public.
Nanoart has been utilized to stimulate critical thinking and
question responsible technology development. Todd Siler’s
metaphorical artworks interpret what nature makes and what
humans make of nature.
[ 96 ] Inspired by the empirical work of
Geoffrey A. Ozin, this art searches the creative process involved
in designing and building nanomaterials such as crystals,
wires, sheets, and tubes.
[ 97 ] The team created several installa-
tions, abstract paintings and sculptures to capture the distinc-
tive feature of nanomaterials, self-assembly, and their behavior
changes with size.
[ 98 ] Siler’s art serves as propositional sche-
matics and creative catalysts for sparking innovative thinking.
The theme of Siler’s and Ozin’s work involves metaphorical
art that correlates the human brain’s handiwork and nature’s
innovations in nanotechnology, and its responsible application
to pressing world problems. These artworks also critique the
effect of developments in nanotechnology on the environment
and humanity. Siler’s installation, Metaphorming Nature, fea-
tured artworks visualizing nano- and microscale bottom-up to
top-down processes and physical interactions between atoms
and nanomaterials, such as nanoscale crystals, wires, sheets,
and tubes (Figure 6 c). Furthermore, these artworks questioned
the perceived fear about the unknown implications of nano-
technology among the public. Siler’s works were exhibited
at CU Art Museum, University of Colorado, Boulder and the
Armory Show, New York City in 2014.
The Materials Research Society has an annual Science as
Art competition, which encourages the creation of visualiza-
tion methods that allows the analysis and presentation of sci-
entifi c work.
[ 99 ] This initiative aims to highlight microscopy
images that transcend the role as a medium for transmitting
information, and transform them into objects of beauty and art.
The structures for the competition were created from copper,
gold, nickel, zinc, indium, and their oxides and alloys, as well
as compounds such as silicon, graphite, Ti
3 AlC 2 , SiC, CoFeB,
SnS, GeTe, KOH, epoxy, block copolymers, and polystyrene.
Chemical and physical vapor deposition, focused-helium-beam
writing, chemical and electrochemical etching, annealing, elec-
trodeposition, deep reactive-ion etching, and self-assembly were
utilized to create nanostructures. These microscopy images
featured nanowalls, foams, composites, nanowires, magnetic
structures, nanocrystals, nanopillars, pyramids, porous pat-
terns, fi lms, and lamellae. The images were digitally colored
and presented within a theme. While most of the images
were uncontrolled structures that resembled macroscale
objects, some images were rationally designed to create artistic
expressions.
4. Picoart
At an even smaller scale, picoart involves atomic manipulation
to create static and dynamic structures having visual appeal. In
1989, Don Eigler at IBM became the fi rst person to manipulate
individual atoms to draw patterns ( Figure 7 a). [ 100 ] A scanning
tunneling microscope (STM) was used to arrange 35 xenon
atoms to write the company acronym, which represented the
fi rst controlled atomic assembly. The tungsten tip of the micro-
scope was used to pick atoms by applying a short voltage pulse,
and the atoms were positioned by applying a voltage pulse of
opposite polarity. Figure 7 b shows IBM “Blue Nickel”, which
represents the adaptation of multiple cultural positions: single-
color obsession like Picasso; overwrought sense of melancholy;
and exposure of the nonlabor of the “work” of art by using the
scientifi c instrument.
[ 101 ]
A Boy and His Atom was the fi rst atomic-scale stop-motion
animation created by Nico Casavecchia, Andreas Heinrich,
and Christopher Lutz at IBM Almaden Research Center in
2013 (Figure 7 c).
[ 102 ] The video-game-resembling animation
depicts a boy playing with an atom that transforms into var-
ious patterns. At the beginning of the animation, the atom
separates from a bulk material, which represents a twelve-
atom magnetic memory. The patterns were created by 65
carbon monoxide molecules on a copper substrate in a device
that operated at −268 °C. 242 still images were captured using
a scanning tunnel microscope, where the oxygen compo-
nent of each molecule appeared as a white dot in each frame
(45 nm × 25 nm). The motivation of this animation was to
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Figure 7. Picoart. a) The fi rst example of patterning atoms at nanoscale. Scale bar = 1 nm. b) “Blue Nickel” consisting of uninterrupted periodicities was
inspired by the tessellations created by the Moors or those of Maurits Escher. To render the unreconstructed FCC (110) surface appealing to the public,
the artist created the “blue period”. Scale bar = 0.1 nm. c) A Boy and His Atom. Scale bar = 5 nm. Reproduced with permission.
[ 139l ] Copyright 2012, IBM
Corporation.

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create an abstract artwork to question science and technology.
The animation implies that advances in atomic manipulation
aims to create extreme computation and data storage at infi ni-
tesimal proportions.
5. Microphotography in Life Sciences
Imaging cellular and tissue architectures involves microscopic
contrast methods such as bright fi eld, polarization, and fl uo-
rescence. Recent advances in digital processing, labeling, and
high-performance optical-imaging devices have improved the
resolution, sensitivity, and specifi city of molecular-detection
capabilities of microscopic analyses.
[ 103 ] Such devices include
charged-coupled device (CCD) and complementary metal-oxide-
semiconductor (CMOS) cameras with low noise and high
quantum effi ciency. These visualization technologies have
benefi ted neuroscience,
[ 104 ] oncology, [ 105 ] immunology, [ 106 ]
and developmental biology.
[ 107 ] Despite their rapid progress,
emerging bioimaging and detection techniques are not well
recognized by the general public. To promote activities in bio-
logical research, there is an emerging trend to create nano-/
microscale photography that shows artistic views of cellular life.
Nikon’s Small World contest, the art gallery of Lab on a Chip
journal, and Olympus BioSpaces digital-imaging competition
showcase these microscopy images.
[ 108 ] Differential interfer-
ence constant (DIC) microscopy has been used to image sub-
cellular physical structures of cells without labeling.
[ 109 ] For
instance, Rogelio Moreno used DIC microscopy to photograph
the aquatic animal, Rotifer, revealing its mouth interior and
heart-shaped corona ( Figure 8 a). Sub-diffraction-limited images
based on super-resolution microscopy have also been created
in conjunction with computational biochemistry that improved
the resolution.
[ 110 ] Muthugapatti K. Kandasamy photographed
super-resolved subcellular structures in bovine pulmonary
artery endothelial cells, which were stained for actin (pink),
mitochondria (green) and DNA (yellow) (Figure 8 b). Confocal
microscopy has also been utilized to image the blurred features
of multicellular organisms.
[ 111 ] For example, Dominik Paquet
photographed an aesthetic Alzheimer zebrafi sh by fl uorescently
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Figure 8. Microphotography in life sciences. a) The aquatic animal, Rotifer, imaged by differential-interference-contrast microscopy. Scale bar = 50 µm.
Reproduced with permission.
[ 139m ] Copyright 2014, Rogelio Moreno, published by Nikon. b) Intracellular structures of bovine pulmonary artery endothe-
lial cells visualized by super-resolution microscopy. Scale bar = 10 µm. Reproduced with permission.
[ 139m ] Copyright 2014, Muthugapatti K. Kandasamy,
published by Nikon. c) Neurons in an Alzheimer zebrafi sh were imaged by confocal imaging. Scale bar = 100 µm. Reproduced with permission.
[ 139n ]
Copyright 2009, Dominik Paquet, published by Nikon. d) “Microscopic apples” based on micropatterning of albumin and fi bronectin proteins. Scale bar =
100 µm. Image provided by Anna Tourovskaia and Albert Folch and reproduced with permission.
[ 139a ] e) “Neurons looking at you” cellular micropatterns.
Image provided by Xavier Figueroa and Albert Folch and reproduced with permission.
[ 139a ] Scale bar = 100 µm. f ) Partying cells in the island at night.
Scale bar = 100 µm. Image provided by Anna Tourovskaia and Albert Folch and reproduced with permission.
[ 139a ] g) Microscale stamp with rectangle
notches made of agarose gel. Dyes diffused into this stamp give its colorful patterns. Scale bar = 1 mm. Image provided by Albert Folch and reproduced
with permission.
[ 139a ] h) Cells on micropatterned polymer pedestals. Scale bar = 40 µm. Reproduced with permission.
[ 139o ] Copyright Nicholas Gunn. i)
Cells cultured on a biopolymer scaffold. Scale bar = 10 µm. Reproduced with permission.
[ 139p ] Copyright 2011, Christopher Guérin, published by Nikon.

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labeling the tau gene (red), pathological tau (blue), and neurons
(green) across its body (Figure 8 c).
Micropatterning coupled with advanced imaging has been
used to construct artistic scenes in life sciences. Particularly,
proteins and cells were spatially controlled to create various
biological designs at the nano-/microscale.
[ 112 ] Albert Folch and
colleagues created such artistic images including “microfabri-
cated apples”, “neurons looking at you”, and “the partying cells
in the island”.
[ 113 ] In microscopic apples, albumin (red) and
fi bronectin (green) proteins were coated onto micropatterned
substrates using elastomeric templates (Figure 8 d). For cel-
lular-level photography, live cells exhibited directed growth on
substrates containing protein masks to form cellular micropat-
terns, as illustrated in “neurons looking at you” (Figure 8 e) and
“partying cells” (Figure 8 f).
Polymers have also been used to create micropatterned
structures based on lithography and microfabrication.
[ 114 ] For
example, stamp microstructures were created from agarose gel
(Figure 8 g). This work comprised seven rectangular notches
(0.5 mm × 1.0 mm) that were used to print food dyes. The
microstamp was colored due to the diffusion of these dyes into
the gel matrix during patterning. Micropatterned polymers
were integrated with cellular samples and digitally modifi ed to
create hybrid structures. For instance, Nicholas Gunn created
microscale polymer pedestals on a glass substrate. 3T3 cells cul-
tured on these micropallets were digitally colored (Figure 8 h).
Furthermore, micropatterned polymers were combined with
cell cultures to create visually appealing images. Christopher
Guérin created such an image with cells growing on biopol-
ymer scaffolds (Figure 8 i). Additionally, the use of transgenic
biotechnologies created a fi eld called “bioart”, which questions
practices such as the risks of genetically modifying animals.
[ 115 ]
Since bioart and life sciences utilize common approaches,
including imaging methods, the microphotographic expres-
sions in life sciences will gain new meanings, annotations, and
roles in a social context. Furthermore, advances in life sciences
and synthetic biology will lead to new opportunities for visu-
alization and the use of biotechnology as a means of creating
artwork, in addition to communicating scientifi c information
through visualizations.
6. Discussion
Raising awareness of current scientifi c developments and their
benefi ts for society is crucial to political support and research
funding. The adoption of new technologies relies on the invest-
ment of the general public, who are often more likely to sup-
port technological changes if the benefi ts and potential risks
are clearly understood.
[ 116 ] Hence, the large-scale distribution
and the implementation of nano-/microscale technologies
require the ability to effectively convey its benefi ts and limita-
tions to the public. Academic norms and habits must continue
to change in order to encourage direct engagement with the
public. Federal agencies and private donors have introduced
initiatives to increase the transition of scientifi c knowledge
from academia directly to the public over the last decade. Such
initiatives are necessary because the scientifi c knowledge does
not always fl ow from experts to the public, but is a shared and
multidirectional interactive experience.
[ 117 ] However, scientists
and technology developers are not optimally trained to commu-
nicate their research to the general public.
[ 118 ] The creation of
further synergies between art and science can augment scien-
tifi c outreach effort and enable broader public awareness about
nano-/microscale technologies.
The arts have a long-standing reputation to challenge domi-
nant paradigms and reduce widely spread misperceptions.
[ 119 ]
For example, arts through installations and exhibitions can
challenge established but outdated norms, express concerns
about social injustice, create an atmosphere that encourages
public debate, and thereby infl uence individuals of all ages.
[ 120 ]
The arts also promote new perspectives for looking at margin-
alized or silenced issues and give a voice to topics considered
taboo. Therefore, the arts liberate ideas by playing an eman-
cipative social role challenging the status quo.
[ 119,121 ] The arts
also allow complex scientifi c ideas to be synthesized, simpli-
fi ed, and conveyed while also rendering the information memo-
rable. Consequently, the utilization of critical art in communi-
cating emerging technologies can distill scientifi c knowledge
to a socially fundamental level and encourage new ways to
look at problems, which can play a signifi cant role in public
campaigns.
[ 122 ] For example, installations and exhibitions can
encourage technology developers to communicate in alternative
ways, and to convey complex scientifi c concepts to the public
more effectively at a socially acceptable level.
[ 122 ] The visual and
performing arts also create memorable moments and a celebra-
tory atmosphere by appealing to emotions, which are physio-
logical changes to sensory experiences. When the emotions are
targeted, individuals pay more attention to a particular event
and commit to the cause storing information in their long-term
memory.
[ 123 ] According to the Triandis’ Theory of Interpersonal
Behavior, emotions signifi cantly infl uence behavior, which is
moderated by moral beliefs, and cognitive limitations.
[ 124 ] Such
an experience can create three main forms of stimulation:
neutral ground, liminality, and communitas.
[ 125 ] The neutral
ground enables the discussion of controversial issues around
the development of technology and safety concerns about their
diffusion into our daily lives. Liminality represents a psycholog-
ical ambiguity, in which the basic ideas and norms are broken
down or weakened, and this disorientation allows individuals
to reposition their points of view. Lastly, communitas is the
unstructured community, where all the members are treated
equally and experience liminality as a group. Hence, the incor-
poration of art into communication of technology can promote
new ways of considering issues, appeal to emotions, and form a
celebratory atmosphere.
Nano-/microscale art renders indistinct the formerly distin-
guishable concepts of artifact and nature.
[ 126 ] Art at the nano-/
microscale also represents a historical shift from older epistemic
values of mechanical objectivity. This concept allows the percep-
tion of reality to be transcended from a solely visual culture to
connectivity and sensing. The combination of nano-/microfab-
rication and art emphasizes building from the bottom up rather
than top-down. In contrast to traditional means of producing
macroscale art through abstract distance or symbolic extraction,
nano-/microscale art directly appeals to the feelings associ-
ated with local contact that combines poiesis (making), techne
(craft), and episteme (true belief). Nano-/microart negotiates
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and reworks cultural boundaries between science and art while
creating a critical disruption and parody that challenge de facto
thinking, cultural logic, and values in a meaningful and posi-
tive way. For example, the artistic expressions of the preparation
processes and applications of nanotechnology to biotechnology
facilitate discussion about health and environmental implica-
tions, which are critical factors in encouraging pro-technology
behavior. Hence, art at the nano-/microscale is a platform to
familiarize the public with the omnipresence of emerging tech-
nologies, facilitate the spreading of scientifi c knowledge, pro-
mote responsible technology development, infl uence opinion,
and educate the public.
Nano-/microart has a role to play in critical thinking and
creativity. Learning of scientifi c concepts is a contextual pro-
cess mediated by cognitive,
[ 127 ] affective, [ 128 ] motivational, [ 129 ]
and sociological
[ 130 ] factors. Because messages delivered
through nano-/micro art have the potential to appeal to dif-
ferent senses, it can stimulate episodic,
[ 131 ] tangential, [ 132 ]
incidental learning,
[ 133 ] and create long-term memory. This
requires the creation of installations that go beyond sight to
appeal to a multitude of senses including taste, smell, chemo-
receptors, hearing, touch, and other sensory modalities, such as
vibration, balance, and kinesthetic sense. For example, Midas
(2007), an immersive biomedia nanoart installation created
by Paul Thomas, involved a visual and sonic interaction with
a 3D skin-cell model.
[ 134 ] The interplay of vision, touch, and
hearing challenged human perceptions by extending aurality,
and reworking the geographies within the ontologies of touch.
Potential interactive installations may include themes such as
biotechnology, social controversies, the digital world, infor-
mation technologies, robotics, and human–machine interac-
tion. Such nanotechnology exhibitions are well positioned to
combine with other disciplines such as responsive sensing
materials, mobile applications, and optical art involving Pep-
per’s ghost, photonic crystals, holography, and laser light instal-
lations.
[ 135 ] Other unexplored frontiers include performing
nano-/microarts: acting, music, dance, theatre, performance
poetry, ballet, illusion, opera, standup comedies, and puppetry.
Such promotional initiatives will not only allow imagination for
new technologies, but also enable recruiting students into the
fi elds of nano-/microtechnology and innovation.
Nano-/microart installations can be presented in interactive
learning modules of visual elements to simulate chemical and
physical phenomena and quantum effects. For example, visuals
that can zoom in and out of material geometry, or move them
around can enhance the interaction experience. For example,
using motion detection (PlayStation, Sony; Xbox, Microsoft;
Wii, Nintendo), the audience can control atoms or nanomate-
rials to explore the states of matter. These systems can provide
intuitive 3D animations integrated with visual and haptic feed-
back. These interactive platforms can include exponential nota-
tion to understand and compare the size of nano-/microscale
materials to macroscale objects. A practical approach is the
creation of virtual electron microscopes that allow adjustment
of the focus, contrast, and magnifi cation of nano-/microscale
artwork and other forms of life. Other approaches may include
installations exploring the fundamentals of nano-/microtech-
nology using interactive videos and performances. Such instal-
lations may also include themes such as explanations about
how transistors and integrated circuits work and their manu-
facturing, inner workings of electron microscopes, quantum
mechanics/behavior, DNA self-assembly, protein synthesis,
manipulation of electrons and nanomaterials, and creation of
nanodevices. Game-based learning is another approach that
can be incorporated in interactive installations.
[ 136 ] For example,
NanoMission (Playgen, London) has created video games in
which the players explore the applications, role, and importance
of nanoscience including nanoparticle-based drug delivery.
[ 137 ]
In these missions, players learn about the operation of nano-
electronics, building and functionalizing molecules, nanoscale
imaging, bottom-up self-assembly, and nanomedicine. Hence,
nano-/microtechnology integrated into interactive media and
arts holds potential as a communication tool to introduce new
concepts to the public. The future of nano-/microart is in inter-
active platforms for spurring creativity and the promotion of
science and technology, as well as creating public discussions
about the implications and opportunities of nanotechnology.
7. Conclusion
Nano-/microscale materials have been utilized in creating tools
and artistic work since prehistoric times. However, recently we
have gained the ability to directly manipulate and image matter
from the macroscale down to atomic resolution. This leap in
imaging and controlling matter represents a breakthrough in
the human endeavor to understand the invisible small-scale
phenomena in our macroscopic world and to engineer versa-
tile technologies. Nano-/microscale materials and device engi-
neering require awareness of the safety of human health and
the protection of fi nite environmental resources. As the public
embraces emerging technologies and products at the nano-/
microscale, scientists and technology developers should be pre-
pared to disseminate their fi ndings concisely and in a timely
fashion to the public and policy makers.
The effective communication of ideas outside the scientifi c
domain requires understanding of human psychology and the
way the brain processes and maintains information in a social
context. Arts have been a predominant stimulator and cata-
lyzer for simplifying and effectively communicating complex
concepts. The advent of controlling and imaging matter at the
nano-/microscale has created new art forms that have been
utilized to spur creativity and new ideas, educate the public,
and infl uence policy making. At the center of these emerging
artistic domains is the collaboration between scientists and art-
ists who are learning to collaborate in order to achieve common
goals. Artists and scientists approach creativity and exploration
in different perspectives, and working together enables new
ways of questioning, discovering, and interpreting the matter.
Whether through governmental, academic, or industry initia-
tives, scientists and artists are self-organizing to create nano-/
microart. This collaboration stimulates discussions with the
aim of fi nding solutions for the most pressing needs of society,
and advancing our understanding of human existence.
We are in the midst of a development phase, where concepts
in data-driven sciences and emotion-driven arts are intersecting
more frequently.
[ 126a ] Aided by the growth of interdisciplinary
research and emerging digital platforms, collaboration between
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arts and sciences is evolving to educate the public about novel
materials and engineering concepts integrated with new aes-
thetic perspectives. These emerging nano-/microtechnology
platforms represent new media of expression and communica-
tion for both artists and scientists. However, the value of nano-/
microart can only be exploited by putting the technology in a
context to deliver a specifi c message, where the meaning is
enhanced by the small size and the sense of mystery presented
by the real objects. Such approaches require going beyond visu-
ally appealing images, and emphasizing messages that com-
bine intellectual engagement with the clarity of presentation
to the intended audience. This spectrum between art as a pure
expression using nano-/microscale media and art designed to
cultivate public understanding of technology is an essential ele-
ment of the growing era of nanotechnology.
Acknowledgements
A.K.Y. and S.H.Y designed the project. A.K.Y. wrote the manuscript. A.F.C.
contributed to Microphotography in Life Sciences. S.H.Y, A.F., A.J.H.,
M.K., A.K., G.E., and J.H. made intellectual contributions and edited the
manuscript. The authors declare no competing fi nancial interest.
Received: May 18, 2015
Revised: July 5, 2015
Published online: December 15, 2015
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