Annop Klamchuen

National Nanotechnology Center, Thailand | NANOTEC · Nano-Characterization Laboratory

This study focused on enhancing the sensitivity and selectivity to detect melamine by utilizing a photoelectrochemical method. This was achieved by combining a melamine-imprinted polymer with a CuO/g-C3N4 nanocomposite, which was synthesized through chemical precipitation and calcination. The resulting nanocomposite exhibits improved carrier mobili...

Triboelectric nanogenerators (TENGs) have gained significant attention as promising energy-harvesting devices that convert mechanical energy into electrical energy through charge separation induced by friction and electrostatic induction. In this study, we explore the utilization of biowaste shrimp shell-extracted chitin nanofiber (ChNF) as a viabl...

An understanding regarding impacts of growth-related myopathies, i.e., white striping (WS) and wooden breast (WB), on the quality of dietary protein from cooked chicken breast is still limited. This study aimed at comparing protein content and in vitro protein digestion and estimating the in vitro protein digestibility corrected amino acid score (P...

Rapid and sensitive detection of Dengue virus remains a critical challenge in global public health. This study presents the development and evaluation of a Zinc Oxide nanorod (ZnO NR)-surface-integrated microfluidic platform for the early detection of Dengue virus. Utilizing a seed-assisted hydrothermal synthesis method, high-purity ZnO NRs were sy...

Transition metal nitrides (TMN) are promising material alternative to replace noble metals in the field of plasmonic applications, especially surface‐enhanced Raman spectroscopy (SERS). Here we demonstrate a practical surface enhanced Raman spectroscopy (SERS) substrate using zirconium nitride (ZrN) thin films grown by reactive gas‐timing (RGT) rf...

Silicene, with its unique two-dimensional layered Si nanosheets, has been attracting increasing attention in recent years. This is due to its graphene-like structure and outstanding anode properties. There have been a few experimental studies of anodes in lithium-ion batteries (LIBs). The main problems are limited material resources and complicated...

This study systematically investigates the influence of antimony (Sb) species on the electrical properties of Sb-doped zinc oxide (SZO) thin films prepared by pulsed laser deposition in an oxygen-rich environment. The Sb species-related defects were controlled through a qualitative change in energy per atom by increasing the Sb content in the Sb2O3...

Melamine contamination in food and beverages affects short- and long-term health. In this work, enhanced sensitivity and selectivity in photoelectrochemical determination for melamine detection was achieved using copper(ii) oxide (CuO) combined with a molecularly imprinted polymer (MIP). A CuO nanomaterial was used to achieve MIP surface modificati...

Based on that chain packing which is associated with the number of entanglements per chain and thereby chain length is an influential factor closely related to the properties of polymeric coating film, the nanothin film of zinc oxide (ZnO) nanofiller–incorporated polystyrene (PS) coated on Si substrate important to electronic packaging for protecti...

Zr-W-Ti thin films were deposited by magnetron co-sputtering technique with varied Ti-sputtering power between 25 and 150 W. The effect of Ti-sputtering power on their physical and mechanical properties was investigated. As a results of FE-SEM, XPS, AFM, XRD, and HR-TEM investigations, the Ti-sputtering power affected the Ti-containing structure of...

Transparent electrode (TE) is considered as one of the fundamental components in the optoelectronics. The surface of TE layer plays a crucial role in the charge-transport characteristics. Herein, a systematic investigation on the morphological properties of the laser-ablated aluminum-doped zinc oxide (AZO) films as a TE material prepared from vario...

Hot-electron transfer between an electrode surface and an adsorbate is potentially useful in numerous electrochemical technologies, especially those operating at room temperature. Although challenging, estimation of the parameters controlling such a transfer process is fundamentally important to electrode design and utilization. Herein, nanothin Au...

Of late, air pollution in Asia has increased, particularly in built-up areas due to rapid industrialization and urbanization. The present study sets out to examine the impact that pollution can have on the health of people living in the inner city of Bangkok, Thailand. Consequently, in 2021, fine particulate matter (PM2.5) and coarse particulate ma...

In this study, we investigate the structural and optical property of alternative plasmonic titanium nitride nanorods (TiN-NRs) films. The TiN-NRs films were deposited by reactive high-power impulse magnetron sputtering (R-HiPIMS) with glancing angle deposition (GLAD) technique at room temperature. The effect of operating pressure on the film crysta...

In this study, p-type spinel CuCo2O4 nanomaterials with abundant oxygen vacancies were synthesized by a facile one-step solution combustion method, and their sensing characteristics have been investigated. The p-type CuCo2O4 sensor shows a high response of 11 to 1 ppm O3 and low responses (< 2) to various interference gases (100 ppm NH3, NO2, SO2,...

Rich Interfaces in C/SiOx Nanocomposite Anodes In article number 2200303, Yutthanakon Kanaphan, Annop Klamchuen, Nonglak Meethong, and co‐workers reveal the roles of interface in C/SiOx nanocomposite anodes for Li‐ion batteries (LIBs) by experiments and first‐principles calculations. Rich interfaces between carbon and SiOx provide additional storag...

Chicken meat from spent laying hens (SHs) has been considered as nutritive as the meat of commercial broilers (CBs) based on chemical composition. High insoluble collagen in SH meat might reduce protein digestibility and bio-accessibility compared to CB meat. This study aimed at comparing the in vitro protein digestibility of CB and SH cooked breas...

Improving manganese oxides as cathodic catalysts in direct methanol/hydrogen peroxide fuel cells by incorporation of Cu and Fe to promote oxygen reduction (OR) and hydrogen peroxide reduction (HPR) is reported. The Cu‐incorporated and Fe‐incorporated MnxOy were prepared by impregnation and solvothermal processes. From XRD, XPS, and XAS analyses, th...

Silica is a promising anode material for high-energy lithium-ion batteries (LIBs), but it suffers from several problems. The main issue is low electrical conductivity, which limits its practical applications. Fabricating silica–carbon nanocomposites (C/SiO2) can significantly enhance the electrochemical performance of these materials. In this work,...

The purpose of this study was to develop monodispersed polystyrene particles as certified reference materials in accordance with the ISO 17034: 2016 and the ISO Guide 35. It can play a significant role especially during the COVID-19 pandemic since several covering items such as filtering facepiece respirators or medical masks must be investigated f...

Zinc oxide (ZnO) nanowires have shown their potential in isolation of cancer-related biomolecules such as extracellular vesicles (EVs), RNAs, and DNAs for early diagnosis and therapeutic development of diseases. Since the function of inorganic nanowires changes depending on their morphology, previous studies have established strategies to control t...

Films of zinc oxide (ZnO), with thickness ranging from 100-400 nm and perforated by pores, are fabricated using variable angle magnetron sputtering and characterized using X-ray fluorescence (XRF) and scanning electron microscopy (SEM). The nanopores of such films make them suitable for gas-sensors and other applications, but the effective surface...

In this study, to enhance selective and sensitive salbutamol detection based on the carbon plate electrode was modified with the novel-molecularly imprinted polymer (MIP) combined with reduced graphene oxide (RGO). RGO/MIP was prepared by polymerization containing methacrylic acid as a monomer and salbutamol as a template. The modified electrode wa...

Most commercial rechargeable battery types suffer from several drawbacks, including high cost, toxic and hazardous materials, poor performance and general non-sustainability. Aluminium-ion batteries (AIBs), with aluminium as the most common metal in the Earth's crust, can theoretically overcome almost all these shortcomings. However, the intercalat...

Ni-doped WO3 nanorod films were fabricated via a reactive magnetron cosputtering with a glancing angle deposition technique. The crystal structure and surface morphology were observed using grazing incident X-ray diffraction and field emission Scanning Electron Microscopy, respectively. The chemical compositions and oxidation state of each element...

The performance of a metal-enhanced fluorescence (MEF) substrate is fundamentally based on the orientation of the metal nanostructures on a solid substrate. In particular, two-dimensional (2D) periodic metallic nanostructures exhibit a strong confinement of the electric field between adjacent nanopatterns due to localized surface plasmon resonance...

This study successfully demonstrated the tailoring properties of hafnium nitride (HfN) thin films via reactive gas-timing (RGT) RF magnetron sputtering for surface-enhanced Raman spectroscopy (SERS) substrate applications. The optimal RGT sputtering condition was investigated by varying the duration time of the argon and nitrogen gas sequence. The...

Novel molecularly imprinted polymers (MIPs) represent a selectively recognized technique for electrochemical detection design. This rapid and simple method prepared via chemical synthesis consists of a monomer crosslinked with an initiator, whereas low sensitivity remains a drawback. Nanomaterials can improve charge transfer for MIP surface modific...

In this work, we systematically investigated the Zr-W-Ti nanostructured metallic glasses (NMGs) thin films on silicon (Si) wafer substrate fabricated via multitarget co-sputtering with oblique angle deposition (OAD) technique. By varying the substrate angles (θs) from 0° to 55°, the evolution of Zr-W-Ti NMGs from dense to nanocolumnar and nanorod f...

Kinetic approaches are commonly used to evaluate the thermal stability of motor oils. Hence it is crucial to identify the optimal kinetic method to gain the acceptable accuracy of the result. Thermal stability of motor oil was studied under a thermal degradation time of 12 months with thermogravimetric analysis (TGA) and differential scanning calor...

In this work, the origin of long-term stability in the silver nanorods (Ag NRs) feasible for surface-enhanced Raman spectroscopy (SERS) substrate was investigated. The Ag NRs films were deposited on silicon wafer substrates by magnetron sputtering with the glancing-angle deposition (GLAD) technique. It was found that the background contamination in...

In this work, the reactive magnetron co-sputtering with oblique angle deposition (OAD) was used for preparing NiWO nanorod films. The influence of the sputtering power of Ni target on the microstructural, morphology, and chemical composition of the NiWO nanorod films were investigated. The grazing incident X-ray diffraction (GIXRD) pattern indicate...

In this research, antimony doped ZnO (SZO) thin films with various doping content have been grown on a c-Al2O3 substrate by pulsed laser deposition. The effect of the applied electric field on the bandgap of SZO thin films was studied by electroreflectance (ER) spectroscopy using a capacitor-type geometry. Hall effect measurements indicate that the...

RNA analytical platforms gained extensive attention recently for RNA-based molecular analysis. However, the major challenge for analyzing RNAs is their low concentration in blood plasma samples, hindering the use of RNAs for diagnostics. Platforms that can enrich RNAs are essential to enhance molecular detection. Here, we developed the annealed ZnO...

The present study aimed at assessing the impact of lysine restriction performed during different feeding phases on growth performances, meat quality traits and technological properties as well as on the incidence and severity of breast muscle abnormalities. For this purpose, a total of 945 one-day-old Ross 308 male chicks was randomly divided into...

In this work, the surface modification using a two-steps plasma etching has been developed for enhancing energy conversion performance in polytetrafluoroethylene (PTFE) triboelectric nanogenerator (TENG). Enhancing surface area by a powerful O2 and Ar bipolar pulse plasma etching without the use of CF4 gas has been demonstrated for the first time....

In this work, a facile and controllable method to fabricate high-density silver nanofilaments (Ag NFs) from β-silver sulfide (β-Ag2S) for surface-enhanced Raman scattering (SERS) substrates was reported. The β-Ag2S crystal structure affects the growth of Ag NF significantly. The optimal silver nanofilaments with a density of 5.93 × 10⁹ NF/cm ² and...

Antibacterial materials containing biocides suffer from the fact that biocides are usually quickly released and hence display a limited antibacterial ability over a long period of time. To overcome this problem, the antibacterial agent 6-chloropurine is conjugated to a monomer via a hemiaminal ether linkage. The functional monomer is then reacted w...

Aluminium-ion batteries (AIBs) are a promising energy storage system due to their significant advantages of low cost, high anode capacity and safety. Nevertheless, the critical challenge limiting AIB performance is an inadequate cathode capacity that diminishes their cell energy density. To overcome this limitation, it is important to develop novel...

Carbon nanotube/polydimethylsiloxane composite micropillar (CNT/PDMS MP) arrays were successfully fabricated using non-lithographic silicon nanowire (SiNW) arrays as a template for performance enhancement of triboelectric nanogenerators (TENG). The CNT/PDMS MP arrays were obtained by pouring CNT/PDMS composites on the SiNW arrays and peeled off. Su...

Alumina thin films were prepared by pulsed DC reactive magnetron sputtering using operating pressures that were varied from 3 - 20 mTorr. The films were immersed in DI water at temperatures of 55 ˚C and 65 ˚C for 30 min to study their hydrolysis corrosion behaviors. Unlike bulk crystalline Al2O3 materials, sputtered alumina films fabricated at oper...

In this study, the non-lithography fabrication of nanoflake aluminum oxide (Al2O3) film with omnidirectional broadband antireflection properties was demonstrated. The nanoflake Al2O3 films on glass slide and silicon wafer substrates were sequentially prepared by reactive magnetron sputtering and surface modification with alkali-treatment and hot wa...

In this study, blade-coating deposition was investigated for the ability to prepare thin films of unmodified sunscreens on substrates. The effect of rheological behavior on film thickness prepared by blade coating deposition was examined by employing four sunscreen formulations (SF1–SF4) with different amount of gelling agent as a model system. The...

Gluten is a protein found in cereal grain such as wheat, barley, and rye. A small amount of gluten causes an autoimmune disease that leads to damage in the digestive system as well as a skin body system. The detection of gluten in food attracts tremendous attention. Surface modification by molecularly imprinted polymers electrode has been studied f...

Ar&H 2 plasma treatment was proposed to enhance the response of p-CuAlO 2 sensor toward volatile organic compounds. Comprehensive defect characterizations indicate a substantial increase of surface unsaturated oxygen vacancy (VO) defects...

Dynamic in-situ spectroscopic ellipsometry (iSE) was employed to investigate the growth mechanism of the tantalum oxide (TaO) film on silicon wafer substrate deposited by reactive gas-timing RF magnetron sputtering compared with conventional reactive sputtering. The effect of reactive gas timing parameter on physical structure and optical property...

The amorphous tantalum oxynitride (TaOxNy) thin films were prepared on silicon (100) substrates by magnetron sputtering system with different techniques of conventional reactive sputtering and reactive gas-timing (RGT). The films were studied via spectroscopic ellipsometry (SE) measured in the range of 0.75–5.0 eV with 0.025 eV interval at 70° inci...

In this work, we report on the mixed bipolar and unipolar resistive switching behavior in ZnO nanowires observed through conductive atomic force microscopy measurements on an individual nanowire. Both bipolar and unipolar resistive switching in ZnO nanowires are size-independent, suggesting that the switching is due to conductive filaments with dim...

Catalytic transfer hydrogenation (CTH) of biomass-derivatives to value-added chemicals using metal-based catalysts is a promising process in biorefinery since it does not require high pressure of expensive and flammable hydrogen gas (H2). However, an activation of these catalysts using H2 treatment prior to the CTH process limits this advantage. He...

Thermoelectric generation capable of delivering reliable performance in the low-temperature range (< 150 °C) for large-scale deployment has been a challenge mainly due to limited properties of thermoelectric materials. However, realizing interdependence of topological insulators and thermoelectricity, a new research dimension on tailoring and using...

The gluten protein is found in some rice and flour. The allergy of gluten, a little bit of gluten in diet cause long-term damage and dangerous to the body. Even tiny amounts of gluten in diet may bring enormous symptoms. The rapid and simple method for gluten detection is molecularly imprinted polymers (MIP) combined with electrochemical analysis....

Surface treatment of titanium (Ti) surface has been extensively studied to improve its properties for biomedical applications, including hydrophilicity, corrosion resistance, and tissue integration. In this present work, we present the effects of thermal oxidation as surface modification method on metallic titanium (Ti). The Ti foils were oxidized...

Tungsten trioxide (WO3) nanoplates were grown employing a low cost acid treatment method. Firstly, the tungsten oxide hydrate (WO3·H2O) nanoplates were grown on silicon wafer and glass slide substrate at different HNO3 temperature from 60 to 90°C. The as prepared were the tungsten oxide hydrate (WO3·H2O), then transformed into monoclinic WO3nanopla...

High-performance recyclable SERS substrates with well-ordered hybrid nanostructure gold nanoparticles (Au NPs) decorated on titanium dioxide nanorods (TiO2 NRs) were successfully prepared by combining two methods. The TiO2 NRs were fabricated by electron-beam evaporation with glancing-angle deposition (GLAD) technique, then the Au NPs were decorate...

Here, the dependence of growth time on the growth behavior, morphology and photoelectrochemical (PEC) properties of ZnOnanorods (ZnO-NRs) as a photoanode are demonstrated. Vertical-aligned ZnO-NRs with c-axis perpendicular to substrate were accomplished via seed-assisted hydrothermal technique at the growth time varying between 0.5 and 24h. Growth...

The semicontinuous gold film, enabling various electronic applications including development of surface-enhanced Raman scattering (SERS) substrate, is investigated using conductive atomic force microscopy (CAFM) and Kelvin probe force microscopy (KPFM) to reveal and investigate local electronic characteristics potentially associated with SERS gener...

Here we demonstrate a novel device structure design to enhance a converting electrical output of triboelectric device through piezoelectric effect as called piezo-induced triboelectric (PIT) device. By utilizing the piezo-potential of ZnO NWs embedded into PDMS layer attached on the top electrode of conventional triboelectric device (Au/PDMS-Al), t...

Spectroscopic ellipsometry (SE) was used to characterize the effect of the CO2/SiH4 ratios on the p-type hydrogenated microcrystalline silicon oxide (p-μc-SiOx:H) thin films. The p-μc-SiOx:H thin films were fabricated by very high frequency plasma-enhanced chemical vapor deposition (VHF-PECVD) method on the soda-lime glass substrates. The CO2/SiH4...

This article provides an approach to improve and control crystal phases of the sputtering vanadium oxide (VxOy) thin films by post-thermal annealing process. Usually, as-deposited VxOy thin films at room temperature are amorphous phase: post-thermal annealing processes (400 °C, 2 hrs) under the various nitrogen (N2) pressures are applied to improve...

In this work, highly transparent and highly conductive thin films of Al-doped ZnO (AZO) are achieved by pulsed laser deposition (PLD). By changing substrate temperature in the range of room temperature to 500°C during the deposition process, the preferential growth direction of AZO crystal is controlled and, therefore, the surface morphology, optic...

Growths of the indium tin oxide (ITO) nanorod films have been demonstrated by ion-assisted electron-beam evaporation with the glancing-angle deposition technique based on variation in deposition rate. Investigations have been performed on nanostructured ITO films deposited on ITO-coated commercial substrates in comparison to bare substrates. The ph...

Here we show a rational strategy to fabricate single crystalline NiO nanowires via a vapor-liquid-solid (VLS) route, which essentially allows us to tailor the diameter and the spatial position. Our strategy is based on the suppression of the nucleation at vapor-solid (VS) interface, which promotes nucleation only at the liquid-solid (LS) interface....

Here we demonstrate a powerful technique to fabricate high quality Zn3N2 thin films at room temperature and without any applying additional energy sources as called reactive gas-timing (RGT) rf magnetron sputtering. The single phase of Zn3N2 film formation can be obtained only when the reactive pulse-gas of N2 is utilized. We find that selecting a...

In this paper, we demonstrate a novel technique, as called reactive gas-timing (RGT) rf magnetron sputtering, to control and design an optical band engineering of TaON thin films without an external heating substrate temperature and post annealing treatment process. The influence of the oxygen intervals ranged from 5 to 60 s on deposition rate, che...

Here we demonstrate a special technique to control a texture orientation of silver (Ag) thin films via using gas-timing (GT) rf magnetron sputtering. By utilizing GT technique, a dense structure and a high ratio of (111)/(200) of Ag films could be obtained without any applying additional energy sources. We found that the GT technique not only provi...

Metal oxide nanowires hold great promise for various device applications due to their unique and robust physical properties in air and/or water and also due to their abundance on Earth. Vapor-liquid-solid (VLS) growth of metal oxide nanowires offers the high controllability of their diameters and spatial positions. In addition, VLS growth has appli...

Here we demonstrate the controllability on morphology of hydrothermal ZnO nanowires through the critical concentration for nucleation. When Zn ion concentration is relatively low, the nucleation process preferentially occurs on the (0001) plane, promoting nanowire growth. In contrast, for relatively high Zn ion concentration, the () plane emerges,...

Analyzing sizes of DNA via electrophoresis using a gel has played an important role in the recent, rapid progress of biology and biotechnology. Although analyzing DNA over a wide range of sizes in a short time is desired, no existing electrophoresis methods have been able to fully satisfy these two requirements. Here we propose a novel method using...

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Single crystalline metal oxide nanowires formed via a vapor-liquid-solid (VLS) route provide a platform not only for studying fundamental nanoscale properties but also for exploring novel device applications. Although the crystal phase variation of metal oxides, which exhibits a variety of physical properties, is an interesting feature compared wit...

Photoassisted atomic switches (PASs) are those produced using photoconductive organic materials. However, the use of solid photoconductive materials and the formation of a large Ag conductive bridge lead to the formation of large voids during the shrinking of Ag conductive bridges; this may degrade the performance of PASs. A low-melting-point organ...

We demonstrated the DNA separation by using the three dimensional Christmas-tree nanowire chips embedded in the microfluidic system to enhance the separation range and decrease the time consuming also. We synthesize the Christmas-tree nanowire by decorating Au catalyst along the nanowires structure by sputtering and growing the branch of nanowires...