A5052855757- Diamond and Carbon-based Materials Research
- Semiconductor materials and devices
- Metal and Thin Film Mechanics
- Graphene research and applications
- Carbon Nanotubes in Composites
- ZnO doping and properties
- Advancements in Battery Materials
- Gold and Silver Nanoparticles Synthesis and Applications
- Anodic Oxide Films and Nanostructures
- Advanced Battery Materials and Technologies
- Advanced Battery Technologies Research
- High-pressure geophysics and materials
- Force Microscopy Techniques and Applications
- Nanowire Synthesis and Applications
- Electronic and Structural Properties of Oxides
- Advanced biosensing and bioanalysis techniques
- Plasmonic and Surface Plasmon Research
- Plasma Diagnostics and Applications
- Advanced Surface Polishing Techniques
- Copper Interconnects and Reliability
- Optical Coatings and Gratings
- Physics of Superconductivity and Magnetism
- Ga2O3 and related materials
- Graphene and Nanomaterials Applications
- Magnetic and transport properties of perovskites and related materials
National Cheng Kung University
2016-2025
Auburn University
1999-2014
Bar-Ilan University
2014
University of St Andrews
2014
Argonne National Laboratory
2014
Tokyo Institute of Technology
2014
United Microelectronics (Taiwan)
2012
Institute of Microelectronics
2008-2011
National University of Kaohsiung
2009
National Cheng Kung University Hospital
2008
Details are given of an experimental study field emission characteristics diamond-coated Mo electrodes: in particular, a transparent anode imaging technique was used to monitor the spatial distribution individual centres. This has revealed important fact that substantial can be obtained at fields as low 5 MV m-1. In order investigate physical nature process, comparative been made from electrode and bulk carbon graphite electrode. Significantly, it found both graphite-rich diamond film...
Dye-sensitized solar cells (DSSCs) were fabricated using a quasialigned one-dimensional zinc oxide (ZnO) nanostructure. The ZnO nanostructures grown on indium tin (ITO) coated glass substrate via thermal chemical vapor deposition (CVD). It has been considered that CVD is not suitable for the growth of nanostructure ITO/glass due to high processing temperature. However, we have demonstrated densely populated can be prepared by double-source double-tube process. power conversion efficiency our...
We report on the observation of ultraviolet lasing in optically pumped ZnO nanonails synthesized by thermal chemical vapor deposition method. The threshold was found to be 17MWcm−2. Very sharp emission peaks (full width at half maximum 0.08nm) were observed spectrum, indicating a high Q factor cavity formed hexagonally shaped nanonail head. analysis spectra strongly suggests whispering gallery mode from head single nanonail.
In this paper results are presented from an investigation of the growth ionization in nitrogen, a uniform electric field, starting one or more initiatory electrons. The electrons described by distribution function f(vrt) while ions assumed stationary. electron is obtained with use Monte Carlo methods, taking into account, self-consistently, collective effects due to space-charge field generated and ions. From kinetic investigation, we have gained insight avalanche-to-streamer transition role...
High-quality Co-doped ZnO single crystalline films with a wide range of carrier concentration and good reproducibility have been grown by molecular beam epitaxy. After the systematic studies magnetic transport properties films, we suggest that there are two distinct ferromagnetic mechanisms in different conductivity regimes. In insulating regime, carriers tend to be localized, favoring formation bound polarons, which leads ferromagnetism. metallic however, most weakly localized free...
Nanodiamonds (NDs) are considered to be relatively safe carbon nanomaterials used for the transmission of DNA, proteins and drugs. The feasibility utilizing NDs deliver CRISPR-Cas9 system gene editing has not been clearly studied. Therefore, in this study, we aimed use as carriers components designed introduce mutation RS1 associated with X-linked retinoschisis (XLRS). ND particles a diameter 3 nm were functionalized by carboxylation surface covalently conjugated fluorescent mCherry protein....
Details are given of an experimental study the characteristics field-induced electron emission from 15 mm diameter CVD diamond films deposited on Mo substrate. Three dedicated techniques have been used to characterize process: (i) 'transparent anode imaging' technique for recording spatial distributions sites and total current-voltage (I-V) characteristic, (ii) 'anode probe hole' measuring I-V characteristic individual sites, (iii) 'field spectroscopy' studying energy distribution emitted...
Postgrowth annealing was carried out to investigate the photoluminescence of zinc oxide (ZnO) nanorods synthesized using a thermal chemical vapor deposition method. The observed change in after processes strongly suggests that positively charged impurity ions or interstitial Zn are recombination centers for green luminescence present sample. A model based on interplay between band bending at surface and migration proposed, which satisfactorily explains photoluminescence.
Silver-YBa2Cu3O6+x superconductor ohmic contacts with specific contact resistance on the order of 10−8 Ω cm2 have been demonstrated. Alloying in O2 at 500 °C enhances conductivity by two orders magnitude.
Metallic (Co, Ga)-codoped ZnO single crystalline films have been grown by molecular beam epitaxy. Besides room temperature ferromagnetism, the anomalous hall effect (AHE) due to spin-orbit interaction was also found. The small AHE signals match quantitatively with magnetic hysteresis and can be correspondent intrinsic ferromagnetism in a true diluted oxide charge carrier spin polarization. Both saturation magnetization significantly enhanced additional doping, revealing that is mediated films.
The electronic properties of vertically aligned ZnO nanorods have been investigated using micro-Raman spectroscopy. concentration and mobility the charge carriers were determined via Raman line shape analysis longitudinal-optical-phonon-plasmon coupled mode. local laser heating stress effects considered when analyzing spectra. carrier are 84.8cm2∕Vs 3.8×1017cm−3, respectively. As a comparison, undoped bulk also obtained from analysis. is about 20% lower than that ZnO, which can be attributed...
Science and technology are presented for novel nitrogen-incorporated ultrananocrystalline diamond (N-UNCD) encapsulated NG/copper anode UNCD coatings that may enable next generation Li-ion batteries (LIBs) with potential 10x longer lifetime superior performance than current LIBs. N-UNCD films (∼5–10 nm grain size) exhibit electrical conductivity extreme resistance to chemical corrosion, providing respect uncoated anodes.
The detection of adenine molecules at very low concentrations is important for biological and medical research applications. This paper reports a silver-based surface-enhanced Raman scattering (SERS) sensor with limit molecules. Clusters closely packed silver nanoparticles on surfaces discrete ball-like copper bumps partially covered graphene are deposited by immersion in nitrate. These clusters exhibit abundant nanogaps between nanoparticles, where plasmonic coupling induces high local...
We report on strong plasmonic coupling from silver nanoparticles covered by hydrogen-terminated chemically vapor deposited single-layer graphene, and its effects the detection identification of adenine molecules through surface-enhanced Raman spectroscopy (SERS). The high resistivity graphene after subjecting to remote plasma hydrogenation allows induced local electromagnetic fields among penetrate thus enhances SERS efficiency adsorbed film. layer protects reactive harsh environments...
Nitrogen-incorporated ultrananocrystalline diamond (N-UNCD) and multi-layer-graphene-like hybrid carbon films have been synthesized by microwave plasma enhanced chemical vapor deposition (MPECVD) on oxidized silicon which is pre-seeded with nanoparticles. MPECVD of N-UNCD nanodiamond seeds produces a base layer, from structures nucleate grow perpendicularly to form standing platelets. High-resolution transmission electron microscopy Raman scattering measurements reveal that these platelets...
Ubiquitous mobile electronic devices and rapidly increasing electric vehicles demand a better lithium ion battery (LIB) with more durable higher specific charge storage capacity than traditional graphite-based ones. Silicon is among the most promising active media since it exhibits ten times of capacity. However, alloying by silicon dissociation silicon-lithium alloys induce high volume changes result in pulverization. The loss electrical contacts current collector anode causes rapid decay....
The stochastic evolution in space of an electron avalanche has been investigated with the use Monte Carlo methods. From these investigations we have obtained energy distribution as a function distance from cathode and size, f(n,\ensuremath{\epsilon},x); probability for P(n,x); ionization probability, per unit at x, electrons belonging to size n, ${\ensuremath{\alpha}}_{s}$(n,x). We believe that this is first time any information presented on f(n,\ensuremath{\epsilon},x)...