A5075151896- Diamond and Carbon-based Materials Research
- Electrochemical Analysis and Applications
- Analytical Chemistry and Sensors
- Electrochemical sensors and biosensors
- Semiconductor materials and devices
- Silicon and Solar Cell Technologies
- Electrocatalysts for Energy Conversion
- Thin-Film Transistor Technologies
- Silicon Nanostructures and Photoluminescence
- Fuel Cells and Related Materials
- TiO2 Photocatalysis and Solar Cells
- Semiconductor materials and interfaces
- Advanced Photocatalysis Techniques
- Supercapacitor Materials and Fabrication
- Catalytic Processes in Materials Science
- Conducting polymers and applications
- Gas Sensing Nanomaterials and Sensors
- Silicon Carbide Semiconductor Technologies
- Molecular Junctions and Nanostructures
- Electronic and Structural Properties of Oxides
- Metal and Thin Film Mechanics
- Polymer Nanocomposite Synthesis and Irradiation
- Semiconductor Lasers and Optical Devices
- Anodic Oxide Films and Nanostructures
- Polyoxometalates: Synthesis and Applications
Yamaguchi University
2013-2025
Science & Technology Park (Czechia)
2020
Saitama University
2016-2017
Keio University
2003-2008
Kanagawa Academy of Science and Technology
2006-2008
Tokyo University of Science
2007-2008
The University of Tokyo
1976-2003
Okayama University
2002
Electrochemical properties of nanoporous honeycomb diamond electrodes in an aqueous electrolyte were investigated. Highly ordered structures fabricated by etching the microwave plasma‐deposited films using oxygen plasma. The exhibited a wide electrochemical potential window (ca. 2.5V), similar to unetched film. From impedance measurements, capacitance film was found be (geometric area), which is ca. 200 times greater than that for unetched, as‐deposited surface. results obtained with...
Interdigitated microarray electrodes were developed based on boron-doped amorphous carbon (B-a-C-IDA) that shows extremely higher overpotential for H2 and O2 evolution.Highly sensitive microanalysis of redox analytes with standard potentials than evolution was achieved by B-a-C-IDA.The amplification the oxidation current derived from cycling observed at generator electrode B-a-C-IDA in measurement applying reduction potential to collector (dual mode measurement).For Ce 3+/4+ a 1.6 V,...
Tungsten oxide-based photochromic films that change reversibly in air between colorless-transparent the dark and blue under UV irradiation were prepared by using methylcellulose as a film matrix various dispersants. Alpha-hydroxyl acid such glycolic (GA) or glyceric (GlyA) is best dispersant because it can make transparent adding small quantity much less than of 3-hydroxypropionic ethylene glycol. Fourier-transform infrared spectra Raman indicate strong interaction exists WO3 GA GlyA. The...
Carbon nanotube/nanohoneycomb diamond (CNT-NANO) composite electrodes were fabricated by introducing multiwalled carbon nanotubes into the pores of nanohoneycomb 400 nm diam using chemical vapor deposition method. The electrochemical behavior these was examined with cyclic voltammetry, impedance, and galvanostatic measurements in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" id="ML1" overflow="scroll"> <mml:msub> <mml:mi mathvariant="normal">LiClO</mml:mi>...
To develop the capability to create diamond electrodes with greater functionality, covalent modification was carried out on homoepitaxial single-crystal electrode surfaces. (100) and (111) boron-doped were first prepared homoepitaxially, then subjected oxidative treatments, functional groups oxidized surfaces analyzed by employing X-ray photoelectron spectroscopy (XPS). Based results, we conclude that both singly doubly bonded oxygen generated anodically treated surfaces, whereas only...
Boron-doped diamond (BDD) surfaces were photochemically modified with vinylferrocene (VFC), and the analyzed both qualitatively quantitatively by electrochemical techniques. VFC-modified BDD (VFC-BDD) was prepared ultraviolet (254 nm) irradiation of hydrogen-terminated in mesitylene, acetonitrile, or n-alkane solutions VFC. Cyclic voltammetry (CV) results indicated facile electron transfer between ferrocenyl groups substrate. The surface coverage polycrystalline single-crystal (100) also...
An attempt was made to make use of chemical modification the diamond surface control adsorption Au nanoparticles (AuNPs) on this via self-assembly. AuNPs prepared with a citrate reduction method (c-AuNP) and mercaptoacetic acid (MAA)-modified (MAA-AuNP) were not adsorbed onto hydrogen-terminated oxygen-terminated boron-doped (BDD) surfaces. On other hand, c-AuNP MAA-AuNP found be in homogeneous, well-dispersed fashion NH2-terminated SH-terminated BDDs silane coupling method. It also that...
Crystal-face-selective adsorption of Au nanoparticles (AuNPs) was achieved on polycrystalline boron-doped diamond (BDD) surface via the self-assembly method combined with a UV/ozone treatment. To best our knowledge, this is first report crystal-face-selective an inorganic solid surface. Hydrogen-plasma-treated BDD samples and those followed by treatment for 2 min or longer showed almost no AuNP after immersion in solution prepared citrate reduction method. However, treated 10 s their (111)...
The nanostructured tungsten(VI) oxide (WO3)/cellulose derivatives (cellulose (CE) and triacetyl cellulose (TACE)) hybrid films were prepared by a solution-dipping adsorption process, their structure optical properties have been investigated. Various techniques, including isotherm, transmission electron microscopy (TEM), X-ray diffraction (XRD), atomic force (AFM), energy-dispersive spectroscopy (EDX), in situUV-Vis absorption, situ total internal reflection Raman spectroscopy, used for the...
Phosphorus-doped (P-doped) polycrystalline diamond thin films were deposited on a conductive Si substrate by microwave plasma-enhanced chemical vapor deposition (MWCVD), using liquid source containing phosphorus atoms. The then used as electrodes for the electrochemical reduction of carbon dioxide (CO2) dissolved in aqueous solution. P-doped electrode exhibited approximately 1 V higher overpotential hydrogen evolution reaction than conventional boron-doped (B-doped) an electrolyte. A...
The hybrid electrochemical treatment for persistent organometallic complexes [Cu–ethylenediaminetetraacetic acid (EDTA)] that was a combination of the reduction recovery center metal as nanoparticles and oxidative decomposition organic ligand attempted using potential cycling at oxygen-terminated boron-doped diamond (BDD) electrode. In step organo-metal complex in from , by stepping up anodic limit to region oxygen evolution reaction, reionization electrodeposited Cu could be suppressed...