Saurabh Soni

University of Twente | UT ·  Institute for Nanotechnology (MESA+)

Charge transport across proteins can be surprisingly efficient over long distances—so-called long-range tunneling—but it is still unclear as to why and under which conditions (e.g., presence of co-factors, type of cargo) the long-range tunneling regime can be accessed. This paper describes molecular tunneling junctions based on an encapsulin (Enc),...

To realize molecular-scale electrical operations beyond the von Neumann bottleneck, new types of multifunctional switches are needed that mimic self-learning or neuromorphic computing by dynamically toggling between multiple operations that depend on their past. Here, we report a molecule that switches from high to low conductance states with massi...

Eutectic Gallium‐Indium (EGaIn), a liquid metal with a melting point close to or below room temperature, has attracted extensive attention in recent years due to its excellent properties such as fluidity, high conductivity, thermal conductivity, stretchability, self‐healing capability, biocompatibility, and recyclability. These features of EGaIn ca...

We discuss complex charge transport behaviors induced by redox-reactions in molecular tunneling junctions by gauging the development of charge transport theories which allow for more unified approaches between temperature-dependent and temperature-independent transport. A context is drawn for current experimental works which previously demonstrated...

This paper describes a simple model for comparing the degree of electronic coupling between molecules and electrodes across different large-area molecular junctions. The resulting coupling parameter can be obtained directly from current–voltage data or extracted from published data without fitting. We demonstrate the generalizability of this model...

This thesis presents an investigation of the electrical properties of about 70 different molecules in molecular tunneling junctions (MTJs). It begins by presenting the field of molecular electronics (ME) -- from the advent of quantum mechanics to the first conception of ideas and experiments in ME. Then it discusses different steps in the fabricati...

This review focuses on molecular ensemble junctions in which the individual molecules of a monolayer each span two electrodes. This geometry favors quantum mechanical tunneling as the dominant mechanism of charge transport, which translates perturbances on the scale of bond lengths into nonlinear electrical responses. The ability to affect these re...

This paper describes the conductance of self-assembled monolayers and single-molecules comprising an oligophenyleneethynylene core, functionalized with acenes of increasing length that extend conjugation perpendicular to the path of tunneling electrons. In the Mechanically Controlled Break Junction (MCBJ) experiment, multiple conductance plateaus w...

Despite their ubiquity, self-assembled monolayers (SAMs) of thiols on coinage metals are difficult to study and are still not completely understood, particularly with respect to the nature of thiol-metal bonding. Recent advances in molecular electronics has highlighted this deficiency due to the sensitivity of tunneling charge-transport to the subt...

This study describes the modulation of tunneling probabilities in molecular junctions by switching one of two parallel intramolecular pathways. A linearly conjugated molecular wire provides a rigid framework that allows a second, cross‐conjugated pathway to be effectively switched on and off by protonation, affecting the total conductance of the ju...

Manipulating conductance in parallel molecular pathways is a crucial element in molecular electronics. We explore intramolecular parallel pathways with different bond topology, in form of a quantum circuit, in tunneling junctions comprising self‐assembled monolayers. We employ quantum‐interference switching/gating with an acid, without any structur...

Molecular tunneling junctions should enable the tailoring of charge-transport at the quantum level through synthetic chemistry but are hindered by the dominance of the electrodes. We show that the frontier orbitals of molecules can be decoupled from the electrodes, preserving their relative energies in self-assembled monolayers even when a top-cont...

This paper describes an experimental approach to eliminating the loss of reversibility that surface-bound spiropyrans exhibit when swithced with light. Although such fatigue can be controlled in other contexts, on surfaces, the photochromic compounds are held in close proximity to each other and relatively few molecules modulate the properties of a...

Correction for ‘Systematic experimental study of quantum interference effects in anthraquinoid molecular wires’ by Marco Carlotti et al. , Nanoscale Adv. , 2019, DOI: 10.1039/c8na00223a.

In order to translate molecular properties in molecular-electronic devices, it is necessary to create design principles that can be used to achieve better structure-function control oriented toward device fabrication. In molecular tunneling junctions, cross-conjugation tends to give rise to destructive quantum interference effects that can be tuned...

Molecular tunneling junctions should enable the tailoring of charge-transport at the quantum level through synthetic chemistry, but are hindered by the dominance of the electrodes. We show that the frontier orbitals of molecules can be decoupled from the electrodes, preserving their relative energies in self-assembled monolayers even when a top-con...

This paper describes large‐area molecular tunneling junctions comprising self‐assembled monolayers of redox‐active molecules that exhibit two‐terminal bias switching. The as‐prepared monolayers undergo partial charge‐transfer to the underlying metal substrate (Au, Pt or Ag) that converts their cores from a quinoid to hydroquinoid form. The resultin...

This paper describes large‐area molecular tunneling junctions comprising self‐assembled monolayers of redox‐active molecules that exhibit two‐terminal bias switching. The as‐prepared monolayers undergo partial charge‐transfer to the underlying metal substrate (Au, Pt or Ag) that converts their cores from a quinoid to hydroquinoid form. The resultin...

Quantum interference effects (QI) are of interest in nano-scale devices based on molecular tunneling junctions because they can affect conductance exponentially through minor structural changes. However, their utilization requires the prediction and deterministic control over the position and magnitude of QI features, which remains a significant ch...

This paper examines the relationship between mechanical deformation and the electronic properties of self-assembled monolayers (SAMs) of the oligothiophene 4-([2,2':5',2'':5'',2'''-quaterthiophen]-5-yl)butane-1-thiol (T4C4) in tunneling junctions using conductive probe atomic force microscopy (CP-AFM) and Eutectic Ga-In (EGaIn.) We compared shifts...

Carbon Quantum Dots, or just Carbon Dots (C-Dots) are a recently discovered new class of fluorescent materials from the nano-carbon family. These C-Dots have come forth as potential competitors for inorganic quantum dots (QDs) and other toxic, heavy-metal based materials, because of their characteristics like low toxicity, elemental abundance and b...

In this report, we demonstrate the use of a facile inkjet printing technology for materials like carbon nanoparticles and their composites. We report the development of a highly fluorescent, UV-active, invisible ink, based on carbon-dots (Cdots) and it’s composite. The Cdots used in the ink were prepared using ethylenediamine and citric acid, using...