A5035408607- Semiconductor materials and devices
- 2D Materials and Applications
- Nanowire Synthesis and Applications
- Ga2O3 and related materials
- ZnO doping and properties
- Electrocatalysts for Energy Conversion
- Anodic Oxide Films and Nanostructures
- Advanced Photocatalysis Techniques
- MXene and MAX Phase Materials
- Advanced battery technologies research
- Transition Metal Oxide Nanomaterials
- Graphene research and applications
- Gas Sensing Nanomaterials and Sensors
- Nitric Oxide and Endothelin Effects
- Body Composition Measurement Techniques
- Thermal Regulation in Medicine
- Phase-change materials and chalcogenides
- Metallic Glasses and Amorphous Alloys
- TiO2 Photocatalysis and Solar Cells
- Perovskite Materials and Applications
- Fuel Cells and Related Materials
- Cardiovascular Function and Risk Factors
- Semiconductor materials and interfaces
- Advancements in PLL and VCO Technologies
- Magnetic properties of thin films
National Yunlin University of Science and Technology
2018-2024
Kaohsiung Chang Gung Memorial Hospital
2022
National Yang Ming Chiao Tung University
2006-2016
Karolinska Institutet
2015
National University of Singapore
2014
Institute of Atomic and Molecular Sciences, Academia Sinica
2013-2014
Massachusetts General Hospital
2001
Harvard University
2001
The monolayer transition metal dichalcogenides have recently attracted much attention owing to their potential in valleytronics, flexible and low-power electronics, optoelectronic devices. Recent reports demonstrated the growth of large-size two-dimensional MoS2 layers by sulfurization molybdenum oxides. However, a selenide has still been challenge. Here we report that introduction hydrogen reaction chamber helps activate selenization WO3, where WSe2 flakes or thin films can be successfully...
Due to its high carrier mobility, broadband absorption, and fast response time, the semi-metallic graphene is attractive for optoelectronics. Another two-dimensional semiconducting material molybdenum disulfide (MoS2) also known as light- sensitive. Here we show that a large-area continuous MoS2 monolayer achievable using CVD method transferable onto MoS2. We demonstrate photodetector based on graphene/MoS2 heterostructure able provide photogain greater than 10(8). Our experiments...
Monolayer molybdenum disulfide (MoS2) has become a promising building block in optoelectronics for its high photosensitivity. However, sulfur vacancies and other defects significantly affect the electrical optoelectronic properties of monolayer MoS2 devices. Here, highly crystalline diselenide (MoSe2) monolayers have been successfully synthesized by chemical vapor deposition (CVD) method. Low-temperature photoluminescence comparison MoSe2 reveals that shows much weaker bound exciton peak;...
<b><i>Objective:</i></b> To investigate the causes of fever in subarachnoid hemorrhage (SAH) and examine its relationship to outcome. <b><i>Background:</i></b> Fever adversely affects outcome stroke. Patients with SAH are at risk for cerebral ischemia due vasospasm (VSP). In these patients, may be both caused by, potentiate, VSP-mediated brain injury. <b><i>Methods:</i></b> The authors prospectively studied patients admitted a neurologic intensive care unit nontraumatic SAH, documenting...
Molybdenum sulfide has recently attracted much attention because of its low cost and excellent catalytical effects in the application hydrogen evolution reaction (HER). To improve HER efficiency, many researchers have extensively explored various avenues such as material modification, forming hybrid structures or modifying geometric morphology. In this work, we reported a significant enhancement electrocatalytic activity MoSx via growing on Tetracyanoquinodimethane (TCNQ) treated carbon...
Low-temperature growth of self-organized ZnO nanorods on Si substrate is achieved using anodic aluminum oxide and atomic layer deposition at 250°C without catalyst or seed layer. Photoluminescence spectrum indicates that the nanorod arrays exhibit a blue∕green luminescence 480nm. In addition, demonstrate excellent field-emission properties with turn-on electric field 6.5Vμm−1 threshold 9.8Vμm−1, which are attributed to perfectly perpendicular alignment substrate.
This study investigated Schottky- and ohmic-contact effects upon the photoresponses of ITO/TiO2/Si Ti/TiO2/Si nanotube-based photodiodes. The TiO2 tube arrays were fabricated by atomic layer deposition (ALD) shaped an anodic aluminum oxide (AAO) template on a p-type Si substrate. contact area between electrode (Ti or ITO) TiO2's tip was varied tuning tube's inner wall thickness with ALD, providing direct systematic probe heterojunction photodiodes' responses. Results show that diode exhibits...
TiO2 thin films and nanotube arrays were fabricated on Si quartz substrates by atomic layer deposition (ALD) with the application of anodic aluminum oxide (AAO) template at 400°C. In particular, thickness film wall nanotubes can be controlled precisely using ALD technique. The photoluminescence (PL) characteristic was improved increased thickness. However, for arrays, decrease thickness, higher PL intensity obtained. Compared exhibited a better performance due to larger surface area. Owing...
Excessive vascular cell proliferation is an important component of pulmonary hypertension (PH). Perlecan the major heparan sulfate (HS) proteoglycan in extracellular matrix. It binds growth factors, including FGF2, and either restricts or promotes proliferation. In this study, we have explored effects perlecan HS deficiency on development hypoxia-induced PH. normoxia, Hspg2Δ3/Δ3 mice, deficient HS, had reduced pericytes muscularization intra-acinar vessels. Pulmonary angiography revealed a...
Abstract The heterojunction effects of TiO 2 nanotubes on photoconductive characteristics were investigated. For ITO/TiO /Si diodes, the photocurrent is controlled either by (p-n junction) or ITO-TiO (Schottky contact). In short circuit (approximately 0 V) condition, -Si dominates photocarrier transportation direction due to its larger space-charge region and potential gradient. detailed transition process was investigated with a time-dependent photoresponse study. results showed that diode...
In this study, we report a facile approach to prepare dense arrays of MoS2 nanoribbons by combining procedures micromolding in capillaries (MIMIC) and thermolysis thiosalts ((NH4)2MoS4) as the printing ink. The obtained had thickness reaching low 3.9 nm, width ranging from 157 465 length up 2 cm. with an extremely high aspect ratio (length/width) ∼7.4 × 10(8) were achieved. pattern can be printed on versatile substrates, such SiO2/Si, sapphire, Au film, FTO/glass, graphene-coated glass....
2-Dimensional (2-D) TiO2 thin films and 1-dimensional (1-D) nanotube arrays were fabricated on Si quartz substrates using atomic layer deposition (ALD) with an anodic aluminum oxide (AAO) template at 400 °C. The film thickness the tube wall can be precisely controlled ALD approach. intensities of absorption spectra enhanced by increase in walls. A blue-shift was observed for a decrease 1-D 2-D nanostructure thicknesses, indicating change energy band gap size nanostructures. Indirect direct...
Self-aligned TiO2 nanotube arrays can be fabricated by atomic layer deposition (ALD) and anodic oxide template (AAO) on Si or quartz substrates. In this study, we compare the hetero-junction effects optical characteristics of for cases with AAO stayed intact after was etched away selectively. Due to space confinement effect that occur only in TiO2/AAO nanotubes, photoluminance intensity material is enhanced about 5 times nanotubes compared nanotubes. On contrary, under 0 V bias, quantum...
The growth rate and the mechanism are investigated by examining results of scanning electron microscope (SEM) X-ray photoelectron spectroscopy (XPS) on TiO2 nanorods fabricated in second anodization process through nanopores anodic aluminum oxide. Due to strong electric field 1.86 GV/m 1.33 GV/m, average ultra-fast 250 nm/s is observed, abrupt increase height reaches 85.2% its destined early stage 0.6 s. Then decreases when decays with height, it interrupted dielectric breakdown under an...
Self-organized anodic titanium dioxide nanorod arrays were fabricated using a two-stage anodization method from superimposed Ti-Al layers deposited on quartz substrates. The morphology of nanorods could be controlled by the anodizing conditions aluminum (first stage) and layer (second stage). first stage process controls diameter density second height nanorods. Therefore, we fabricate with desired aspect ratio under specific conditions. Furthermore, used TiO2 as field ionization anode gas...
The growth mechanism of nanorods fabricated by the anodization Ti films using a mask anodic aluminum oxide is investigated examining rate and morphology nanorods. It found that within first at decreases abruptly to after . In addition, diameter larger near top than root A proposed explain these interesting phenomena.
This paper demonstrates a 4-GHz monolithic SiGe heterojunction bipolar transistor (HBT) quadrature voltage controlled oscillator (QVCO) using superharmonic coupling topology. The VCO at 4.17 GHz has phase noise of -116 dBc/Hz 1MHz offset frequency, output power -6 dBm and the figure merit (FOM) -179 dBc/Hz. core current consumption is 3.2 mA 3V supply voltage. die size about 1.4 mm times 1.2
Nanostructures, such as nanodots and nanorods, have been fabricated by the anodization process with an aid of anodic aluminum oxide (AAO) for several decades. However, tubular nanostructures not reported using AAO-assistant technology until now. In this study, we successfully synthesized self-organized TixWyO nanotubes cap structures first time a two-step from Al-coated TiW alloy layers. The were observed only in shaped pores AAO large enough pore size, otherwise would become solid rods due...