A5109096729- Metal and Thin Film Mechanics
- Diamond and Carbon-based Materials Research
- Microstructure and mechanical properties
- Semiconductor materials and devices
- Aluminum Alloys Composites Properties
- Metallic Glasses and Amorphous Alloys
- Iron oxide chemistry and applications
- Advanced materials and composites
- Soil and Unsaturated Flow
- Magnetic properties of thin films
- Advanced Materials Characterization Techniques
- nanoparticles nucleation surface interactions
- Catalytic Processes in Materials Science
- Geological formations and processes
- Electrodeposition and Electroless Coatings
- Metal Alloys Wear and Properties
- Metallurgy and Material Forming
- Intermetallics and Advanced Alloy Properties
- Bone Tissue Engineering Materials
- Ion-surface interactions and analysis
- Magnetic Properties and Synthesis of Ferrites
- Advancements in Battery Materials
- Electrospun Nanofibers in Biomedical Applications
- Electron and X-Ray Spectroscopy Techniques
- Nanoplatforms for cancer theranostics
University of Maryland, College Park
2015-2024
Center for Nanoscale Science and Technology
2010-2019
Park University
2019
Kyoto Institute of Technology
2013
JEOL (United States)
2013
National Taiwan University
2013
University of California, Los Angeles
2003-2009
University of California, Irvine
2003-2005
Irvine University
2003
Northwestern University
1990-2002
A chemical vapor deposition (CVD) process modified with trapping method has been used to synthesize n-type ZnO nanowires high carrier concentration without incorporating impurity dopants. With this method, a spatial variation of synthesis condition was created and the donors were directly introduced into during process. Electron microscopy electrical transport studies show that having distinct morphologies properties obtained at different locations in CVD system. The elucidates effect...
Abstract Glioblastoma (GBM) is hard to treat due cellular invasion into functioning brain tissues, limited drug delivery, and evolved treatment resistance. Recurrence nearly universal even after surgery, chemotherapy, radiation. Photodynamic therapy (PDT) involves photosensitizer administration followed by light activation generate reactive oxygen species at tumor sites, thereby killing cells or inducing biological changes. PDT can ablate unresectable GBM sensitize tumors chemotherapy....
Abstract This study revealed that osteoblasts generate harder, stiffer, and more delamination-resistant mineralized tissue on titanium than the culture polystyrene, associated with modulated gene expression, uniform mineralization, well-crystallized interfacial calcium-phosphate layer, intensive collagen deposition. Knowledge of this titanium-induced alteration osteogenic potential leading to enhanced intrinsic biomechanical properties provides novel opportunities implications for...
The initiation and reaction mechanism of nano-Al thermites in rapid heating environments is investigated this work. A semiconductor-based grid/stage was used, capable situ a sample from room temperature to 1473 K, at rate 106 K/s, inside an electron microscope. Nano-Al rapidly heated transmission microscope, before after images indicate that the aluminum migrates through shell, consistent with diffusion-based mechanism. nano-Al/WO3 composite then scanning results reactive sintering occurring...
ZrN and ZrSiN films were prepared in an rf sputtering apparatus that has a pair of targets facing each other (referred to as the target—type sputtering). Films deposited on silicon wafers without bias application or substrate heating order examine only effect addition transition metal nitride films. The contents zirconium, nitrogen, determined with electron probe microanalyzer. transmission microscopy studies carried out x-ray diffraction. For high resolution observation, field emission type...
Abstract The iron nanowires can be fabricated via the process in which sodium borohydride reduces salts external magnetic field. are found to covered by passivated layers of oxide prevent oxidation nanowires. In this process, boron will include average length and diameter is around 1.2 micrometers 60 nanometers, respectively. According ICP results, contents B Fe about 1.98 wt% 87.04 wt%, respectively, A wide variety equipment used investigate morphological, microchemical, structural...
In this study two series of morphological fatigue tests were con-ducted with a disk machine for TiN coated rollers as well uncoated rollers. Surface examinations showed that 1 mu;m surfaces underwent principally elastic deformation without coating debonding. However, heavily deformed even after shorter contact cycle. For the rollers, cross-sectional micrographs revealed presence many near-surface microcracks at an asperity scale nearly parallel to surface. It is believed these are initiated...
Analytical electron microscopy has revealed the structure of thin films thermally evaporated Au on atomic layer deposition (ALD) TiO2 deposited glass substrates. An 11 nm thick film was at 200 °C with 417 ALD cycles using tetrakisdimethylamido titanium and H2O precursors. The comprised small particles diameters ∼15 or less grown by Volmer-Weber growth mechanism layer. Transmission analysis showed that it amorphous had Ca atoms incorporated into probably from lime substrate. effect included...
TiAlN/a-C nano-composite coatings were synthesized by a reactive co-sputtering process to investigate the effects of sputtering conditions on microstructure and mechanical properties. Coating films deposited square plates Si high speed steel (ANSI M2) TiAl (pulsed-d.c. sputtering) C (d.c. targets using "Facing Target-type Sputtering" system at an atmosphere with mixture Ar N2 but without hydrocarbon gas. The structure was investigated means XRD, XPS HRTEM GIF (Gatan Imaging Filter)....
Precise structural design of a host-guest complex was carried out from the aspects size and location guest (anatase particles), remaining open space host (mesoporous silica). The anatase particles successfully controlled (3, 5 8 nm) during preparation, size-controlled nanoparticles were preferentially encapsulated into mesopores with diameter nm. Due to precise control particles, dependent photoluminescence quantum dots observed for first time. change in porosity mesoporous silica by...
So far, it has been proven that the magnetic-field-induced (MFI) synthesis is a process which mainly leads to formation of magnetic metallic one-dimensional nanostructures. Taking advantage this method, new procedures allow manufacture bimetallic iron–cobalt wire-like nanochains with Fe0.75Co0.25, Fe0.50Co0.50, and Fe0.25Co0.75 compositions are demonstrated in work. They were produced through simple one-step chemical co-reduction three different mixtures containing proper amount Fe2+ Co2+...
Externally applied magnetic fields have been used in this study to fabricate bamboo-like iron nanowires with or without a layer of Poly(methyl methacrylate) (PMMA). The hybrid PMMA/Fe were synthesized via hard X-ray synchrotron radiation polymerization various treatment parameters. results XRD show that an oxide formed on the surface nanowires. Fe2O3 and Fe3O4 phases coexist irradiation. After irradiation, phase transformed into Fe3O4, which stabilized XAS proved transformation. TGA analysis...
The application of magnetic nanocrystalline powders as radar absorption materials is increasingly attracting R&D interest. Severe agglomeration and mass production, however, are critical issues for practical nanoparticles. In the present study, iron nanowires with varying amounts nickel addition (0, 1, 10, 30, 50 wt%) were synthesized via direct reduction salts aid strong NdFeB magnets. yield rate these Ni-added (NiFe NWs) exceeded 1 g/min, making them suitable was feasible production....