A5049957160- Semiconductor materials and devices
- Electronic and Structural Properties of Oxides
- Supercapacitor Materials and Fabrication
- Advancements in Battery Materials
- ZnO doping and properties
- Ferroelectric and Piezoelectric Materials
- Quantum Dots Synthesis And Properties
- Advancements in Solid Oxide Fuel Cells
- Electrocatalysts for Energy Conversion
- Transition Metal Oxide Nanomaterials
- Advanced battery technologies research
- Conducting polymers and applications
- Microwave Dielectric Ceramics Synthesis
- Ga2O3 and related materials
- Advanced Battery Materials and Technologies
- Fuel Cells and Related Materials
- Corrosion Behavior and Inhibition
- Catalytic Processes in Materials Science
- Advanced Photocatalysis Techniques
- Silicon Nanostructures and Photoluminescence
- TiO2 Photocatalysis and Solar Cells
- Advanced ceramic materials synthesis
- Magnesium Alloys: Properties and Applications
- Magnetic and transport properties of perovskites and related materials
- Advanced Battery Technologies Research
National Taiwan University of Science and Technology
2014-2024
National Taiwan University
2006-2011
American Ceramic Society
1991-2010
Institute of Nuclear Energy Research
2009
National Taiwan Ocean University
2006
Institute of Atomic and Molecular Sciences, Academia Sinica
2004
National Taipei University of Technology
1994
University of Notre Dame
1984-1986
A dense inner layer is highly valued among the surface coatings created through plasma electrolytic oxidation (PEO) treatment, because PEO coating has been troubled by inherent porosity since its conception. To produce favored structure, a proven technique to prompt soft sparking transition, which involves sudden decrease in light and acoustic emissions, drop anodic voltage under controlled current mode. Typically these phenomena occur an electrolyte of sodium silicate potassium hydroxide,...
Abstract Raman spectroscopy (RS) has been used as a technique for the characterization of well‐aligned IrO 2 and RuO nanocrystals (NCs) grown on number different oriented substrates under various conditions. The NCs were via metalorganic chemical vapor deposition reactive magnetron sputtering. relative intensity three strongest Raman‐active modes, namely, A 1 g , B E depends orientation to determine preferred growth direction NCs. redshifts asymmetric linewidth broadening features with...
Tilted SnO2 nanowires (SnO2NW) have been grown and aligned on the sapphire (SA) substrate of orientation (100) or (110). Their structural spectroscopic features are studied using scanning electron microscopy, transmission X-ray diffraction, Raman spectroscopy, with emphasis wire roots. On SA(100) substrate, (001) facet preferentially matches plane. The longitudinal crystal grows in [101] direction enclosing facets {010} {101̅}, which perpendicular to form its rectangular cross-section....
Structural electrodes of anhydrous RuO2 vertical nanorods encased in hydrous have been prepared via chemical vapor deposition (CVD) followed by electrochemical deposition. The composite structures are studied using scanning electron microscopy, transmission X-ray diffraction, and photoelectron spectroscopy. capacitive properties measured cyclic voltammetry impedance In a miniaturized configuration, the CVD grown structure provides connecting backbone paths open channels for ion migration to...
A thin film of novel hierarchical structure, suitable for supercapacitor applications, has been developed through combining conductive multi-wall carbon nanotubes (MWCNTs) and square IrO(2) (IrO(2)NT) nanometer size. Synthesis this structure with open porosity is performed by depositing short tubes densely along the long wires nanotube on a substrate stainless steel. tube rutile grows in [001] direction, an opening at its top, surrounded very walls. The addition MWCNT template increases...
Iridium dioxide (IrO2) nanorods with pointed tips have been grown on Si(100) and transition-metal-coated-Si(100) substrates, via metal–organic chemical vapor deposition (MOCVD), using (MeCp)Ir(COD) as the source reagent. The as-deposited were characterized field-emission scanning electron microscopy (FESEM), transmission (TEM), X-ray diffraction (XRD) photoelectron spectroscopy (XPS). FESEM micrographs revealed that majority of are a wedge shape in cross section converge at top; occasionally...
The electrochemical properties of RuO2/LNO and RuO2/SA electrodes made RuO2 rods plates nanometre size on LiNbO3(100) sapphire(0001) substrates are investigated. Both grown vertically using chemical vapor deposition. electrode has a higher electrolyte/solid surface area compared with the electrode. When immersed in H2SO4 acid, voltammograms both exhibit chemisorption pseudocapacitive characteristics single crystal. features decrease after repeated cyclic voltammetry (CV) sweeps, become more...
We report on the preparation and field-emission properties of vertically aligned conductive IrO2 nanorods. The unique geometrical features nanorods, including nanosized structure self-assembled sharp tip, exhibit a strong effect field enhancement (β∼40 000), which result in low threshold (Eth∼0.7 V/μm) defined at beginning emission. A turn-on for driving current 10 μA/cm2 is about 5.6 V/μm, comparable with carbon nanotube, diamond, amorphous carbon. potential using nanorods as an emitter...
Well-aligned densely-packed rutile TiO(2) nanocrystals (NCs) have been grown on sapphire (SA) (100) and (012) substrates via metal-organic chemical vapor deposition (MOCVD), using titanium-tetraisopropoxide (TTIP, Ti(OC(3)H(7))(4)) as a source reagent. The surface morphology well structural spectroscopic properties of the as-deposited NCs were characterized field-emission scanning electron microscopy (FESEM), transmission (TEM), selected-area diffractometry (SAED), x-ray diffraction (XRD)...
Abstract The interstitial pressure buildup and the internal stresses on skeleton of a cylindrical green body during burnout are analyzed numerically. intrinsic kinetics pyrolysis is coupled with Carman‐Kozeny equation or slip‐flow model Wakao Smith to evaluate distribution. stress distributions before failure estimated from elasticity theory. tensile, their maxima located at center cylinder. tangential larger than radial stress. effects size, specific surface area, pressurized atmosphere...
Upper and lower reciprocal variational principles have been used to estimate the effective conductivity (or diflusivity)across beds of randomly dispersed fibers with orientations distributed in two three dimensions. Estimated thermal conductivities fiber glass insulation, graphite-epoxy reinforced composite materials, as well diffusivities several fibrous materials agree measured values.
We review the results of synthesis IrO2 nanocrystals (NCs) on different substrates via metal-organic chemical vapour deposition (MOCVD) using (MeCp)(COD)Ir as source reagent. The surface morphology, structural and spectroscopic properties as-deposited NCs were characterized field emission scanning electron microscopy (FESEM), transmission (TEM), selected-area diffractometry (SAD), x-ray (XRD), photoelectron spectroscopy (XPS) Raman spectroscopy. roles for formation various textures...
The structural features and catalytic activities of PtIr electrocatalysts derived from vertical IrO2 nanotubes (IrO2NT) 1100 nm in height 80−100 diameter have been studied using scanning electron microscopy, transmission X-ray powder diffraction, cyclic voltammetry toward COad methanol oxidation. Lattice oxygen IrO2NT is removed under high-vacuum thermal annealing to facilitate nucleation 3−5 Ir grains subsequent synthesis catalyst on the tube walls. Interestingly, apparent dimensions...
Silicon carbide (SiC) porous substrates, containing alumina (Al 2 O 3 ) dopant levels of 3, 5, and 8 wt%, are prepared by slip casting sintering in the temperature range 1450°–1800°C. The linear shrinkage, bulk density, pore size sintered substrate increase as amount increase. A large β‐phase SiC is transformed to α‐phase if concentration 5 or wt%. flexural strength doped with wt% Al higher than that ; however, Weibull modulus former lower. composite membranes improved selectivity fabricated...