A5042557120- Gas Sensing Nanomaterials and Sensors
- Analytical Chemistry and Sensors
- Advanced Chemical Sensor Technologies
- Muon and positron interactions and applications
- Advanced ceramic materials synthesis
- Catalytic Processes in Materials Science
- Transition Metal Oxide Nanomaterials
- Mesoporous Materials and Catalysis
- Electrochemical Analysis and Applications
- Atomic and Molecular Physics
- Acoustic Wave Resonator Technologies
- Water Quality Monitoring and Analysis
- ZnO doping and properties
- Plasma Diagnostics and Applications
- Anodic Oxide Films and Nanostructures
- Spectroscopy and Laser Applications
- Synthesis and properties of polymers
- Crystallography and Radiation Phenomena
- Magnesium Oxide Properties and Applications
- Advanced Nanomaterials in Catalysis
- Aerogels and thermal insulation
- Electrocatalysts for Energy Conversion
- Plasma Applications and Diagnostics
- Glass properties and applications
- Bone Tissue Engineering Materials
Nagasaki University
2016-2025
Graduate School USA
2012-2018
High Energy Accelerator Research Organization
2011
Tokyo University of Marine Science and Technology
2008
The University of Tokyo
1994-2007
Massachusetts Institute of Technology
2004-2006
Ricoh (Japan)
2005
Materials Science & Engineering
1999-2004
Tohoku University
2004
Kyushu University
1995-1997
Diode-type gas sensors using an anodized TiO2 film and Pt electrodes modified with Au (Au(n)/Pt/TiO2 (n: sputtering time of Au, 0–120 (s))) have been fabricated their H2-sensing properties investigated in this study. The surface modification the electrode Au(n) drastically improved H2 response dry air. Au(20)/Pt/TiO2 sensor showed largest air among all tested, was close to that N2. clearly increased increase humidity, wet comparable N2, especially under higher humidified atmosphere (e.g.,...
YSZ-based potentiometric sensors employing thin CeO2-added Au sensing electrodes (SEs) were fabricated by using a spin-coating method, and effects of the CeO2 addition on their toluene properties examined. The sensor response (ΔE) to 50 ppm 8 wt% SEs tended decrease with an increase in number cycles (x: 5, 10, 15; i.e., thickness SEs). However, ΔE 24 showed opposite behavior what was observed for SEs. thickest SE 15) largest (e.g., ca. 212 mV toluene) at 450 °C among all examined responded...
Chemical and physical synthesis routes were combined to prepare macroporous CaCu3Ti4O12 thin films by pulsed laser deposition onto poly(methyl methacrylate) (PMMA) microsphere templated substrates. These showed remarkably enhanced gas sensitivity compared with control deposited on untreated substrates, demonstrating the virtues of combining film vapor (PVD) techniques in concert colloidal templates produce structures inorganic surface activity for applications chemical sensors, catalysts, fuel cells.
Gas adsorption properties of semiconductor-type gas sensors using porous (pr-) In2O3 powders loaded with and without 0.5 wt % Au (Au/pr-In2O3 pr-In2O3 sensors, respectively) at 100 °C were examined by diffuse reflectance infrared Fourier transform spectroscopy, the effect loading onto on NO2-sensing discussed in this study. We found following: resistance Au/pr-In2O3 sensor dry air is lower than that sensor; DRIFT spectra both show a broad positive band between 1600 1000 cm–1 (reference: N2...
A series of perovskite‐type manganites, (Ln = lanthanoids or Y), were examined for their electrode‐catalytic activities to reduce oxygen in alkaline solution. Polarization experiments using gas diffusion‐type electrodes revealed that the catalytic activity differed significantly with a change Ln, being order . This coincides decreasing ionic radius
In this work, PdOx-CuOx co-loaded porous WO3 microspheres were synthesized with varying loading levels by ultrasonic spray pyrolysis (USP) using polymethyl methacrylate (PMMA) as a vehicle template. The as-prepared sensing materials and their fabricated sensor properties characterized X-ray analysis, nitrogen adsorption, electron microscopy. gas-sensing studied toward methyl mercaptan (CH3SH), hydrogen sulfide (H2S), dimethyl (CH3SCH3), nitric oxide (NO), dioxide (NO2), methane (CH4),...