A5084900830- Ion-surface interactions and analysis
- Electron and X-Ray Spectroscopy Techniques
- Advanced Electron Microscopy Techniques and Applications
- nanoparticles nucleation surface interactions
- Semiconductor materials and devices
- X-ray Spectroscopy and Fluorescence Analysis
- Silicon Nanostructures and Photoluminescence
- Advanced Materials Characterization Techniques
- Nuclear Physics and Applications
- Advanced Chemical Physics Studies
- Microstructure and mechanical properties
- High-pressure geophysics and materials
- Integrated Circuits and Semiconductor Failure Analysis
- Intermetallics and Advanced Alloy Properties
- Aluminum Alloy Microstructure Properties
- Nuclear Materials and Properties
- Nanofabrication and Lithography Techniques
- High-Temperature Coating Behaviors
- Boron and Carbon Nanomaterials Research
- Neuroscience and Neural Engineering
- Magnesium Alloys: Properties and Applications
- Anodic Oxide Films and Nanostructures
- Neural dynamics and brain function
- Nanowire Synthesis and Applications
- Characterization and Applications of Magnetic Nanoparticles
Yonsei University
2024-2025
First Affiliated Hospital of Henan University
2025
National Institute for Materials Science
2003-2012
Research Institute of Industrial Science and Technology
2011
Indian Institute of Science Bangalore
2004
Okayama University of Science
1990
University of Science and Technology Beijing
1990
University of California, Los Angeles
1983
United States Department of Veterans Affairs
1983
To explore the effectiveness of modified Lemaire procedure in anterior cruciate ligament reconstruction (ACLR) patients with a highly positive pivot shift test. The clinical data 18 (ACL) rupture and test between April 2020 September 2022 were retrospectively analyzed. There 13 males 5 females an average age 28.3 years (range, 17-41 years). Causes injury included 11 cases direct violence injury, including 6 traffic accident 4 sports 1 case falling injury; 7 indirect all injury. All had...
In situ high-resolution electron microscopy has been used to observe nanoprecipitates of crystalline Xe in faceted cavities Al during coalescence induced by 1.0 MeV irradiation at 300 K. Atomic-level fluctuations cavity facets result shape changes and precipitate motion leading coalescence. There is no apparent elastic interaction between precipitates separated as little 0.5 nm. After coalescence, conforms plastic deformation without melting shape. Cavity volume, not surface area, conserved...
Effects of 1 MeV electron irradiation on Xe precipitates in Al, formed by ion implantation, have been observed situ high-voltage transmission microscopy. Individual undergo melting and recrystallization, migration which leads to coalescence, shape changes. These processes are driven the production defects without either cascade defect or introduction additional atoms. Precipitate is due an irradiation-induced surface diffusion process Xe/Al interfaces. Coalescence close enhanced directed...
Various neural probes that can provide highly precise stimulation and prevent cellular damage interference have been used to stimulate systems such as the brain spine. These are designed be micron-sized; therefore, they mechanically fragile high impedances. Mechanical fragility overcome using flexible probes, which suitable for long-term applications. However, impedance of these is most important property considered electrical stimulation, being lowered via diverse methods several...
An expression for the Laplace pressure associated with a cuboctahedral (tetrakaidodecahedral) void having {111} and {200} facets is derived, which includes anisotropy of facet energies. The result compared experiment at 300 K equilibrium size largest Xe nanocrystal, constrained within such voids in Al. From Al-Xe interfacial tensions are deduced by setting corresponding calculated equal to melting K, obtained from empirical bulk compression data. These tension values 1.05 J m 2} 1.10 2...
gamma(')-Fe4N was subjected to electron irradiation with the dose rate of 6.8 x 10(23)e m(-2) s(-1) in a 400 kV transmission microscope. The first situ observation formation Fe3O4 (O) on Fe4N (gamma(')) orientation relationship [100](O) parallel [100](gamma(')) and <001>(O) <001>(gamma(')) has been made inside microscope basic column vacuum (5-6) 10(-5) Pa. A mechanism is proposed involving electron-stimulated dissociation Fe-N chemical bonds, desorption nitrogen from surface, adsorption...
The structure of porous Si samples prepared by conventional photoexcited electrochemical etching in hydrofluoric acid solution is presented. Strain enhanced cracking was evidenced at the surface sample, which synthesized higher incidence angle light. Combined modes carbon-fluorine and/or oxygen related impurities, and silicon-oxides are revealed from Fourier transform infrared investigation. A resonant feature ∼467 nm, originating a strong coupling localized excitons Si/SiO2 interfacial...
Journal Article Xe precipitates at grain boundaries in Al under 1 MeV electron irradiation Get access Charles W. Allen, Allen * 1Argonne National LaboratoryArgonne, IL 60439 USA *To whom correspondence should be addressed. E-mail: allen@aaem.amc.anl.gov Search for other works by this author on: Oxford Academic PubMed Google Scholar Minghui Song, Song 2National Research Institute MetalsTsukuba, Ibaraki 305-0003, Japan Kazuo Furuya, Furuya Robert C. Birtcher, Birtcher Kazutaka Mitsuishi,...
A phase transformation in γ-TiAl intermetallic alloy was found to be induced with 50keV Xe-ion irradiation-implantation at doses larger than 2.2 x 1018 ions m-2 room temperature. The structure and the chemical composition of were investigated high-resolution transmission electron microscopy energy-dispersive X-ray spectroscopy. zones have sizes up about several tens nanometres. has a hexagonal = 0.286 nm c 0.462nm. crystallographic orientation relationship between (P) gamma-TiAl matrix is...
Ion beams are widely used for micro/nanostructure fabrication with unique features of the energetic processes. In this work, we present a self-assembled nanostructure by ion irradiation patterned strain/stress field. The field is introduced micro-Vickers indentation to amorphous SiO2 (load = 100 mN). After 60 keV Cu− ions, nanogrooves (width from 150 250 nm) were created at edge. Under constant flux, nanogroove size linearly increased fluence 2 × 1016 1.2 1017 ions cm−2. Comparison indented...