A5012883535- Nuclear Materials and Properties
- Nuclear reactor physics and engineering
- Nuclear materials and radiation effects
- Radioactive element chemistry and processing
- Fusion materials and technologies
- Silicon Nanostructures and Photoluminescence
- Semiconductor materials and devices
- Nanowire Synthesis and Applications
- Thin-Film Transistor Technologies
- Radioactive contamination and transfer
- Nuclear Engineering Thermal-Hydraulics
- Chemical Synthesis and Characterization
- Physics of Superconductivity and Magnetism
- Advanced materials and composites
- Supercapacitor Materials and Fabrication
- Superconducting and THz Device Technology
- Recycling and utilization of industrial and municipal waste in materials production
- Boron Compounds in Chemistry
- Clay minerals and soil interactions
- Ferroelectric and Piezoelectric Materials
- Intermetallics and Advanced Alloy Properties
- Silicon and Solar Cell Technologies
- Advancements in Solid Oxide Fuel Cells
- Advanced Battery Materials and Technologies
- Advanced Condensed Matter Physics
Texas A&M University
2010-2023
Argonne National Laboratory
2010-2016
Centre National de la Recherche Scientifique
1992-2010
Institut Néel
2010
European Science Foundation
1999
We report on a detailed analysis of the superconducting properties boron-doped silicon films grown along 001 direction by gas immersion laser doping. The doping concentration ${c}_{B}$ has been varied up to $\ensuremath{\sim}10\text{ }\text{at}\text{.}\text{ }%$ increasing number shots 500. No superconductivity could be observed down 40 mK for level below $\ensuremath{\sim}2\text{ }%$. critical temperature ${T}_{c}$ then increased steeply reach $\ensuremath{\sim}0.6\text{ }\text{K}$...
In situ synchrotron radiation measurements of porous silicon (PS) strain have been performed during ultrahigh vacuum (UHV) thermal annealing. For a p+ sample, the initial lattice expansion shifts toward contraction above 270 °C in relation with hydrogen desorption. p− variation is similar to that one, but effects five times larger: after desorption, large (>1.5%) and inhomogeneous. both cases, most these strains are elastic as an HF etch re-establishes narrow diffraction peak....
Time-dependent transient currents were studied at elevated temperatures (200–220°C) in amorphous barium titanate thin film capacitors. Current transients display a peak whose time position varies with applied voltage and temperature. The response is analyzed through space charge limited current theories. Extracted drift mobilities are the 10−11–10−12cm2V−1s−1 range show an activation energy of 1eV. phenomena associated oxygen vacancies migration BaTiO3.
In situ boron-doped hydrogenated silicon films plasma-deposited on various conductive substrates (including transparent oxides glass) have been anodized in hydrofluoric acid solutions and subsequently electrochemically oxidized an aqueous electrolyte. At room temperature, the resulting layers yield visible photoluminescence electroluminescence intensities spectral shapes similar to those of p-type crystalline porous obtained same way. The results demonstrate technological feasibility...
Considerable work is focused on the development of molten salt fueled nuclear reactors. The treatment spent fuel in these systems has unique waste management issues. These typically halogen-based salts are known to be water soluble various degrees. In addition leachability issues, radiolysis may destabilize when they solid form. FLiBe, a favored candidate for fluoride-salt-fueled reactor applications, presents significant challenges. Conversion FLiBe fluorapatite an effective means stabilize...
The loading and kinetics of uptake for the inorganic ion-exchange material, α-zirconium phosphate, Zr(HPO4)2•H2O, were investigated with ions relevant to targeted alpha therapy including natural Cs+ (as a surrogate 221Fr), Bi3+ 213Bi), La3+ 225Ac). narrow interlayer spacing α-phase (d = 7.6 Å) was found not be advantageous respect rapid ion exchange, while converting material hydrated Na-phase 12.2 allowed exchange proceed more quickly, reaching equilibrium in under an hour. High achieved...
Two of the experiment vehicles being developed for Versatile Test Reactor (VTR) are presented here. The first is a rabbit system that will enable rapid insertion small test capsules into high fast flux VTR core relatively short durations. concept development includes construction/demonstration near-full-scale in deep-water pool to demonstrate functionality, operations and initial procedures, validation thermal-hydraulic modeling. In addition, modeling efforts underway simulate thermal...