A5102994467- Ion-surface interactions and analysis
- Electron and X-Ray Spectroscopy Techniques
- Surface and Thin Film Phenomena
- Advanced Chemical Physics Studies
- nanoparticles nucleation surface interactions
- Semiconductor materials and devices
- Advanced Materials Characterization Techniques
- Semiconductor materials and interfaces
- X-ray Spectroscopy and Fluorescence Analysis
- Metal and Thin Film Mechanics
- Integrated Circuits and Semiconductor Failure Analysis
- Nuclear Physics and Applications
- Electronic and Structural Properties of Oxides
- X-ray Diffraction in Crystallography
- Silicon and Solar Cell Technologies
- Catalytic Processes in Materials Science
- Theoretical and Computational Physics
- Magnetic properties of thin films
- Crystallization and Solubility Studies
- ZnO doping and properties
- Quantum, superfluid, helium dynamics
- Atomic and Molecular Physics
- Superconducting Materials and Applications
- Chemical and Physical Properties of Materials
- Polymer Nanocomposite Synthesis and Irradiation
Osaka Metropolitan University
2022-2024
Osaka Prefecture University
2009-2020
Liberal Arts University
2016
Laboratory of Racing Chemistry
2012
RIKEN
2012
Bruker (United States)
2011
Surface (Brazil)
2011
Osaka City University
2008
Graduate School USA
2006
Toshiba (Japan)
2005
Hydrogen adsorption on a clean Si(100)-2\ifmmode\times\else\texttimes\fi{}1 surface has been studied by the high-energy ion- beam method (6-MeV ${F}^{3+}$) combined with low-energy electron diffraction. We report that (1) saturation coverage of hydrogen kept at room temperature is 1.85\ifmmode\pm\else\textpm\fi{}0.18 monolayers (ML), and (2) first 1-ML adsorbs rather quickly, leading to 2\ifmmode\times\else\texttimes\fi{}1-H phase, while more beyond 1 ML occurs very slowly, approaching...
We have investigated the growth of 3 monolayers (ML) Ag on Cu(111) for substrate temperatures from 170 through 640 K by using time flight-impact collision ion scattering spectroscopy (TOF-ICISS). Also, scanning tunneling microscopy (STM) topographs were taken after deposition 0.8 ML atoms at room temperature (RT). observed that above 300 K, two different types epitaxial exist:...
A high-energy H+ microbeam generated by tapered glass capillary optics was applied to a single Escherichia coli cell, in order evaluate the effects of irradiation on activity flagellar motor and cell growth real time. The tethered cells stopped with an average ion fluence 2.0 × 1012 protons/cm2. When lower dose attached substrate, elongated which seemed ready divide, divided into two daughter cells; however, did not elongate, neither further division occur.
Impact-collision ion-scattering spectroscopy, low-energy electron diffraction, and Rutherford backscattering spectroscopy have been used to analyze the $\mathrm{Ni}{111}\ensuremath{-}(\sqrt{3}\ifmmode\times\else\texttimes\fi{}\sqrt{3})R30\ifmmode^\circ\else\textdegree\fi{}\ensuremath{-}\mathrm{Pb}$ structure. It was found that annealing Pb-covered Ni surfaces with an initial coverage of 0.45 ML gives rise a stable The experimental data computer simulations support structural model for...
Polycrystalline tungsten surfaces were irradiated at room temperature with two kinds of nitrogen ions—N+ and N2+—at 2.5 keV by using an ion beam apparatus. Results X-ray photoelectron spectroscopy (XPS) experiments performed synchrotron radiation SPring-8 showed that upon irradiation the sample either kind ion, full widths half maximum (FWHM) W 4f7/2 4f5/2 peaks broadened 35.8 eV 37.8 eV—which correspond to WO3 binding energies—increased slightly; this indicated formation nitride subsurface...
The growth of multilayers Au atoms on Ni(111) has been mainly investigated by using time-of-flight-type impact-collision ion-scattering spectroscopy. We found that only two different types epitaxial exist: $\mathrm{Au}[112\mathrm{\ifmmode\bar\else\textasciimacron\fi{}}]\mathrm{\ensuremath{\parallel}}\mathrm{Ni}[112\mathrm{\ifmmode\bar\else\textasciimacron\fi{}}]$ (normal mode) and...
The nanostructuring process of Ag atoms on the Ni(111) surface was investigated in two different ways: (1) use a morphological change caused by Pb deposition onto Ag-covered and (2) Volmer-Weber growth mode depositions Pb-covered surface. In case (1), preexisting layer transformed into three-dimensional islands (nanocrystals) during at room temperature: nanocrystals were directly surrounded monoatomic layer. (2), nanoparticles formed not bare surface, but layer: particles found to be mobile...
High-quality crystals of β-FeSi 2 are ion-beam synthesized on the surface a floating-zone(FZ)-grown Si wafer, and superconducting quantum interference device (SQUID) ESR measurements performed. semiconductors exhibit paramagnetic properties, Weiss temperature is positive near room temperature. The magnetic susceptibility changes anomalously with
The surface of a CoO(111) single crystal was treated with vacuum ultraviolet (VUV) light at wavelength 172 nm without heat treatment. We studied the structural analysis before and after VUV irradiation in air using low-energy atom scattering spectroscopy. primary beam 3 keV-4He0, backscattered 4He particles from Co atoms were detected microchannel plate detector. compared experimental spectra to simulation results, results demonstrated that rock-salt transformed spinel Co3O4(111)...
The large sized and flat polycrystalline (beta) -FeSi<SUB>2</SUB>/n- Si heterojunction can be formed by a triple energy implantation method the sample annealing at 800 degrees C. -FeSi<SUB>2</SUB> gains show good crystalline characteristics, photoluminescence peak 0.81 eV 4.2 K optical direct band-gap of 0.84 eV. -FeSi<SUB>2</SUB>/n-Si shows diode characteristics high photovoltaic sensitivity for IR light. These results support that ion beam synthesized is promising sensitive materials.