A5086943411- Electrochemical sensors and biosensors
- 2D Materials and Applications
- Conducting polymers and applications
- Nanowire Synthesis and Applications
- Advanced biosensing and bioanalysis techniques
- MXene and MAX Phase Materials
- Electrochemical Analysis and Applications
- Electrocatalysts for Energy Conversion
- Gas Sensing Nanomaterials and Sensors
- Semiconductor materials and devices
- Advanced Photocatalysis Techniques
- Molecular Junctions and Nanostructures
- ZnO doping and properties
- Metal and Thin Film Mechanics
- Analytical Chemistry and Sensors
- Transition Metal Oxide Nanomaterials
- Advanced battery technologies research
- Anodic Oxide Films and Nanostructures
- Semiconductor materials and interfaces
- Silicon Nanostructures and Photoluminescence
- Ferroelectric and Piezoelectric Materials
- Thin-Film Transistor Technologies
- Electrical and Thermal Properties of Materials
- Copper-based nanomaterials and applications
- Fuel Cells and Related Materials
Korea Institute of Industrial Technology
2020-2023
Sungkyunkwan University
2007-2020
Suwon Research Institute
2015
Institute of Nanotechnology
2013-2014
Gyeongsang National University
2001
By plasma-enhanced chemical vapor deposition, a molybdenum disulfide (MoS2 ) thin film is synthesized directly on wafer-scale plastic substrate at below 300 °C. The carrier mobility of the films 3.74 cm(2) V(-1) s(-1) . Also, humidity successfully detected with MoS2 -based sensors fabricated flexible substrate, which reveals its potential for sensing devices.
Alkaline electrolysis is one of the most promising among gas-to-power technologies to produce hydrogen energy where oxygen evolution reaction (OER) plays an important role. It has recently been demonstrated that OER activity layered double hydroxide (LDH) could be enhanced by accommodating more abundant active sites offer optimal binding energies between intermediates. Here, we report a study nickel iron hydroxides varying Ni:Fe atomic ratio Ni1–xFex-LDH induce changes their physiochemical...
A few-layered molybdenum disulfide (MoS2) thin film grown by plasma enhanced chemical vapor deposition was etched using a CF4 inductively coupled plasma, and the possibility of controlling MoS2 layer thickness to monolayer over large area substrate investigated. In addition, damage contamination remaining surface after etching possible method for recovery also The results from Raman spectroscopy atomic force microscopy showed that one exposure 20 s an initial incubation time s, i.e., number...
Abstract This paper reports a biosensor based on MoS 2 -graphene (MG) composite that can measure the parathyroid hormone (PTH) concentration in serum samples from patients. The interaction between PTH and MG was analysed via an electrochemical sensing technique. functionalized using l -cysteine. Following this, could be covalently immobilized electrode. properties of were evaluated scanning electron microscopy, high-resolution transmission X-ray diffraction, Raman spectroscopy, photoelectron...
Molybdenum oxide (MoO3) has gained immense attention because of its high electron mobility, wide band gap, and excellent optical catalytic properties. However, the synthesis uniform large-area MoO3 is challenging. Here, we report wafer-scale α-MoO3 by plasma oxidation Mo deposited on Si/SiO2. was oxidized O2 in a enhanced chemical vapor deposition (PECVD) system at 150 °C. It found that synthesized had highly crystalline structure. For as-synthesized sensor, observed current change when...
Bulk layers of MoS<sub>2</sub> were synthesized <italic>in situ</italic> on a polymer substrate at low temperature for electrochemical biosensing.
In this work, we prepared spinel-type NiCo2O4 (NCO) nanopowders as a low-cost and sensitive electrochemical sensor for nonenzymatic glucose detection. A facile simple chemical bath method to synthesize the NCO is demonstrated. The effect of pH annealing temperature on formation mechanism nanoparticles was systematically investigated. Our studies show that different pHs precursor solution during synthesis result in intermediate phases relating reactions nanoparticles. Different morphologies...
Abstract Herein, a layer of molybdenum oxide (MoO x ), transition metal (TMO), which has outstanding catalytic properties in combination with carbon‐based thin film, is modified to improve the hydrogen production performance and protect MoO acidic media. A film graphene transferred onto layer, after structure doped N S atoms at room temperature using plasma doping method modify electronic intrinsic material. The oxygen functional groups increase interfacial interactions electrical contacts...
Exploring bifunctional electrocatalysts to lower the activation energy barriers for sluggish electrochemical reactions both oxygen evolution reaction (OER) and reduction (ORR) are of great importance in achieving consumption higher conversion efficiency future storage system. Despite excellent performance precious metal-based OER ORR, their high cost scarcity hamper large-scale industrial application. As alternatives electrocatalysts, development earth-abundant efficient catalysts with...
Graphene has become to be the most spotlighted material because it remarkable characteristics and advantages. Despite of these advantages, is difficult apply semiconductor devices low on/off ratio respectively with zero band-gap. However, since molybdenum disulfide (MoS 2 ) band gap 1.96 eV in bulk state as well similar property graphene, can devices. Moreover single layer MoS high mobility 200cm /v -1 s over 10 8 . usually synthesized by Chemical Vapor Deposition (CVD) under relatively...
A novel conducting copolymer based on amidoxime groups, polypyrrole and graphene oxide was synthesized by in situ copolymerization usin g two monomers. The monomer, amidoxime-pyrrole, amidoximation of 1-(2-cyanoethyl) pyrrole. other GO-pyrrole, prepared via esterification between –COOH GO –NH 2 1-(3-aminopropyl) conductive ability the [Formula: see text]-conjugated system backbone. able to be used as an effective sorption material for preconcentration recovery uranium. maximum adsorption...
We investigated the effect of specific surface area on electrochemical properties NiCo2O4 (NCO) for glucose detection. NCO nanomaterials with controlled areas were prepared by additive-assisted hydrothermal synthesis, and self-assembled nanostructures urchin-, pine-needle-, tremella-, flower-like morphologies obtained. The novelty this method is systematic control chemical reaction routes assisted addition different additives during which results in spontaneous formation various without any...
We report on the sensitive detection of glucose using silicon nanowire array field-effect-transistor ( SiNW -FET) upon illumination. The uniformly distributed and size-controlled SiNWs were fabricated by "top-down" approach. -FET device was evaluated for in range 100–900 mg/dL. shows enhanced sensitivity 0.988 ± 0.030 nA (mg/dl) -1 illumination at 480 nm light as compared to without 0.486 0.014 (mg/dL) . presented is fast, stable well bio analyte, hence can be utilized biological sensing platform.
Graphene was chemically aminated via cycloaddition. Aziridine-ring linkages were formed by covalently modifying the C-C double bonds in graphene. The graphene presents an enhanced hydrophilicity, contact angle with water decreases from 80.5 degrees to 58.5 degrees. And conductivity of exhibits exponential decay as reaction time increase. If is 90 min, resistance increased -32 Ω -2744 Ω. Because amino group has good biocompatibility, designed for use enzyme sensor platform, such glucose based...