A5011006265- Semiconductor Quantum Structures and Devices
- Chalcogenide Semiconductor Thin Films
- Advanced Semiconductor Detectors and Materials
- Solidification and crystal growth phenomena
- ZnO doping and properties
- Advanced Photocatalysis Techniques
- Quantum Dots Synthesis And Properties
- Advanced Thermoelectric Materials and Devices
- Gas Sensing Nanomaterials and Sensors
- Neural Networks and Applications
- Copper-based nanomaterials and applications
- Semiconductor materials and interfaces
- TiO2 Photocatalysis and Solar Cells
- Thermal properties of materials
- Semiconductor materials and devices
- Silicon and Solar Cell Technologies
- Transition Metal Oxide Nanomaterials
- Ga2O3 and related materials
- Nonlinear Optical Materials Research
- Magnetic Properties and Applications
- Microstructure and Mechanical Properties of Steels
- Thermal Radiation and Cooling Technologies
- Crystallization and Solubility Studies
- Advanced Nanomaterials in Catalysis
- Advanced Sensor and Energy Harvesting Materials
Shizuoka University
2016-2025
Sendai National College of Technology
2009-2023
National Institute of Technology
2015-2023
SRM Institute of Science and Technology
2021
Osaka Institute of Technology
2021
Hamamatsu University
2014-2020
SRM University
2019
Graduate School USA
2015-2018
Institute of Electronics
1999-2018
National Institute of Technology, Nara College
2017
The two-dimensional (2D) transition metal dichalcogenide nanosheet-carbon composite is an attractive material for energy storage because of its high Faradaic activity, unique nanoconstruction and electronic properties. In this work, a facile one step preparation molybdenum disulfide (MoS2) nanosheet-graphene (MoS2/G) with the in situ reduction graphene oxide reported. structure, morphology composition pure MoS2 composites were comparatively analyzed by various characterization techniques....
Silicon germanium alloys (Si80Ge20) have been used in thermoelectric generators for deep space missions to convert radioisotope heat into electricity. This work demonstrates the highest value of figure-of-merit (ZT) ∼1.84 at 1073 K n-type SiGe nanostructured bulk alloys, which is 34% higher than reported record alloys. The optimized samples exhibit a Seebeck coefficient ∼284 μV K−1, resistivity ∼45 μΩ m and thermal conductivity ∼0.93 W m−1 K−1 K. main contributing factor enhanced ZT very low...
Nanoparticle single-phase nickel sulfides such as NiS, NiS<sub>2</sub>, Ni<sub>3</sub>S<sub>4</sub>, and Ni<sub>7</sub>S<sub>6</sub> were prepared from elemental sulfur nitrate hexahydrate, using a temperature-controlled precursor injection method.
Herein, a magnetically separable reduced graphene oxide (rGO)-supported CoFe2O4-TiO2 photocatalyst was developed by simple ultrasound-assisted wet impregnation method for efficient photocatalytic H2 production. Integration of CoFe2O4 with TiO2 induced the formation Ti3+ sites that remarkably optical band gap to 2.80 eV from 3.20 eV. Moreover, addition rGO improved charge carrier separation forming Ti-C bonds. Importantly, CoFe2O4-TiO2/rGO demonstrated significantly enhanced production...
Graphene-ceria (CeO2G) nanocomposites were prepared by using a low-temperature solution process with different weight percentages of graphene, and their electrochemical properties investigated. Structural the studied X-ray diffraction, Raman spectroscopy, FTIR spectral analyses. FE-SEM HRTEM images revealed "wrinkled paper"-like morphology composites. Elemental mapping recorded FE-EPMA technique. XPS analyses binding states elements present in The composite 5% graphene displayed specific...
We report the fabrication and testing of a riboflavin (RF) biosensor based on use Cr doped SnO2 nanoparticles. The Cr–SnO2 nanoparticles with chromium concentration from 0 to 5 wt% were synthesised by microwave irradiation method. Magnetic studies revealed that only 3 nano-SnO2 has ferromagnetic behaviour at room temperature. This modified electrode responded RF linearly over range 0.2 × 10−6 1.0 10−4 M detection limit 107 nM. fabricated sensor showed an excellent anti-interference ability...
The synthesis of nanoparticles has great control over the structural and functional characteristics materials. In this study, CeO2 Ni-CeO2 spherical were prepared using a microwave-assisted method. characterized via thermogravimetry, X-ray diffraction (XRD), Raman, FTIR, scanning electron microscopy (SEM), photoelectron spectroscopy (XPS), vibrating sample magnetometry (VSM) cyclic voltammetry (CV). pure exhibited flake-like morphology, whereas Ni-doped showed morphology with uniform shapes....
2D-layered molybdenum disulfide (MoS<sub>2</sub>) and MoS<sub>2</sub>/TiO<sub>2</sub> nanocomposite were synthesized by a hydrothermal method.
Microstructure, soft magnetic properties, and applications of high resistive Fe-M-O (M=Hf, Zr, rare-earth metals) were studied. The films are composed bcc nanograins amorphous phases with larger amounts M O elements which chemically combine each other. Consequently, the have electrical resistivity. compositional dependence resistivity, structure been almost clarified. For example, magnetization 1.3 T, permeability 1400 at 100 MHz resistivity 4.1 μΩ m simultaneously obtained for as-deposited...
The efficient conversion of heat into electricity using a thermoelectric approach requires high performance materials with the figure merit ZT ≥ 1. Here we report on bulk CuCrSe2, which exhibits very ∼ 1 at 773 K. titled compound an electrical resistivity ∼2.8 mΩ cm, Seebeck coefficient ∼160 μV K−1, together low thermal conductivity ∼7 mW cm−1 K−1 CuCrSe2 is attributed to phonon scattering by various sources such as (i) superionic Cu ions between CrSe2 layers, (ii) nanoscale precipitates in...