A5075527108- Strong Light-Matter Interactions
- Quantum Dots Synthesis And Properties
- Semiconductor Quantum Structures and Devices
- Quantum and electron transport phenomena
- Chalcogenide Semiconductor Thin Films
- Gold and Silver Nanoparticles Synthesis and Applications
- Plasmonic and Surface Plasmon Research
- Cold Atom Physics and Bose-Einstein Condensates
- Mechanical and Optical Resonators
- Perovskite Materials and Applications
- Semiconductor materials and devices
- Spectroscopy and Quantum Chemical Studies
- Advanced biosensing and bioanalysis techniques
- Thermal Radiation and Cooling Technologies
- ZnO doping and properties
- Nanocluster Synthesis and Applications
- 2D Materials and Applications
- Adsorption and biosorption for pollutant removal
- Photonic and Optical Devices
- Integrated Circuits and Semiconductor Failure Analysis
- Nanoparticle-Based Drug Delivery
- Advanced Nanomaterials in Catalysis
- Molecular Junctions and Nanostructures
- Luminescence and Fluorescent Materials
- Photorefractive and Nonlinear Optics
Taiwan Semiconductor Manufacturing Company (Taiwan)
2022
Michigan State University
2013-2020
DEVCOM Army Research Laboratory
2016-2018
Mitre (United States)
2018
National Taiwan University
2005-2017
National Chung Hsing University
2017
National Central University
2017
Lawrence Berkeley National Laboratory
2000-2016
University of Waterloo
2015-2016
National Yang Ming Chiao Tung University
2015
Go for gold: As-prepared insulin–Au nanoclusters (NCs) show intense red fluorescence, excellent biocompatibility, and preservation of natural insulin bioactivity in lowering the blood-glucose level. Their versatility applications is demonstrated by fluorescence imaging, X-ray computed tomography, insulin–inhibitor interactions (see picture; IDE=insulin-degrading enzyme).
Highly uniform Fe3O4/SiO2 core/shell nanoparticles functionalized by phosphorescent iridium complexes (Ir) have been strategically designed and synthesized. The Fe3O4/SiO2(Ir) nanocomposite demonstrates its versatility in various applications: the magnetic core provides capability for resonance imaging great enhancement of spin-orbit coupling complex makes it well suited labeling simultaneous singlet oxygen generation to induce apoptosis.
The tuning of CdSe quantum dot (QDs) sizes, and consequently their corresponding two-photon absorption (TPA) cross section, has been systematically investigated. As the size (diameter) dots increases, TPA section is found to be empirically related via a power-law proportionality 3.5+/-0.5 5.6+/-0.7 diameters CdTe QDs, respectively. results are tentatively rationalized theoretical model excitation properties in system incorporating excitons defects.
The effects of metal coating on the near-band-edge emission ZnO thin films have been studied by photoluminescence and atomic force microscopy. Large enhancement in intensity has observed from when they are capped Ag while negligible effect is seen Au-coated films. In addition, found to increase with thickness eventually saturates at 200nm. By introducing MgO as a spacer between ZnO, shown decrease increasing thickness, which suggests presence local fields induced surface plasmons. As energy...
Based on 15-crown-5 functionalized CdSe/ZnS quantum dots (QDs), we report a novel fluorogenic sensor to probe K+ ions in H2O; recognition of can be achieved via the Förster type energy transfer between two different color QDs, so that [K+] order 10(-6) M promptly detected.
Abstract A new series of quadrupolar type two‐photon absorption (2PA) chromophores 3 – 9 bearing a core arylamine‐[ , c ]phenazine‐arylamine motif are synthesized in high yields. Palladium‐catalyzed Stille coupling and CN reactions utilized to prepare target chromophores. Detailed characterization systematic studies these molecules, including fluorescence emission, conducted. These compounds found exhibit very large 2PA cross section values, for example, ∼7000 GM at 800 nm 8 toluene....
Trifunctional uniform nanoparticles comprising a manganese nanocrystal core and functionalized mesoporous silica shell (MnO@mSiO2(Ir)@PEG, where Ir is an emissive iridium complex PEG polyethylene glycol) have been strategically designed synthesized. The T1 signal can be optimized by forming hollow (H-MnO@mSiO2(Ir)@PEG) via novel facile etching process, for which the mechanism has discussed in detail. Systematic investigation on correlation longitudinal relaxation (T1) versus shapes porosity...
Structural colors and photoluminescence have been widely used for anti-counterfeiting security applications. We report the first time use of CdS quantum dot (QD)-functionalized cellulose nanocrystals (CNCs) as building blocks to fabricate nanothin films via layer-by-layer (LBL) self-assembly Both negatively- positively-charged CNC/QD nanohybrids with a high colloidal stability narrow particle size distribution were prepared. The controllable LBL coating process was characterized by scanning...
A novel nanocomposite device, which consists of liquid crystals and semiconductor nanorods, has been designed fabricated. It reveals a very unique useful behavior in that the polarization emission from nanorods can be controlled by an external bias. The large magnitude anisotropy 0.63 quantitatively interpreted well terms dielectric contrast between crystal. Our approach is quite general, applicable to other nanomaterials, it utilizes currently mature crystal display technology. results open...
A record high PCE of up to 3.2% demonstrates that the efficiency hybrid solar cells (HSCs) can be boosted by utilizing a unique mono-aniline end group PSBTBT-NH2 as strong anchor attach CdTe nanocrystal surfaces and simultaneously exploiting benzene–1,3-dithiol solvent–vapor annealing improve charge separation at donor/acceptor interface, which leads efficient transportation in HSCs. Detailed facts importance specialist readers are published "Supporting Information". Such documents...
Abstract Our goal was to analyze the changes in morphology and physiological function (phagocytosis, migratory capabilities, humoral cellular response, nitric oxide secretion) of murine macrophages after labeling with a clinically used superparamagnetic iron (SPIO), ferucarbotran. In SPIO‐treated macrophages, nanoparticles were taken up cytoplasm accumulated membrane‐bound organelle. Macrophage proliferation viability not modified SPIO labeling. Phagocytic decreased only 10 µg Fe/mL SPIO,...
Emission enhancement from ZnO thin films coated with Al∕AlOx has been studied by photoluminescence spectroscopy. While Al exhibits a moderate on ZnO, the introduction of an ultrathin AlOx spacer can increase luminescence significantly. By examining dependence light emission Al∕AlOx∕ZnO thickness, we found, other than surface plasmon mediation, short-ranged nonradiative channel that plays crucial role in determining overall is also present. Based simple analytical model, it found process...
We report ab initio calculations of the spin splitting uppermost valence band (UVB) and lowermost conduction (LCB) in bulk atomically thin GaS, GaSe, GaTe, InSe. These layered monochalcogenides appear four major polytypes depending on stacking order, except for monoclinic GaTe. Bulk few-layer $ε$- $γ$-type, odd-number $β$-type InSe crystals are noncentrosymmetric. The splittings UVB LCB near $Γ$-point Brillouin zone finite, but still smaller than those a zinc-blende semiconductor such as...
The rational design and synthesis of CdSe/CdTe/ZnTe (core-shell-shell) type-II quantum dots are reported. Their photophysical properties investigated via the interband CdSe-->ZnTe emission its associated relaxation dynamics. In comparison to strong CdSe (core only) (lambda(max) approximately 550 nm, Phi(f) 0.28), a moderate CdSe-->CdTe 1026 1.2 x 10(-3)) rather weak 1415 1.1 10(-5)) resolved for structure (3.4/1.8/1.3 nm). Capping CdSe/CdTe with ZnTe results in distant electron-hole...
Based on the enhanced electron–hole recombination rate generated by surface plasmon (SP) waves of Au nanoparticles (NPs) and electrons transferred from CdSe quantum dots (QDs) to NPs, we propose a mechanism elucidate luminescent behavior in nanocomposites. With our proposed model, enhancement spectrally integrated PL intensity can be manipulated up factor ∼33, largest value ever reported. Our study used clarify ambiguity controlling light emission quenching semiconductor nanocrystals coupled...
Abstract We demonstrate optically induced switching between bright and dark charged divacancy defects in 4 H -SiC. Photoluminescence excitation time-resolved photoluminescence measurements reveal the conditions for such charge conversion. For an energy below 1.3 eV (above 950 nm), PL is suppressed by more than two orders of magnitude. The recovered presence a higher repump laser with time-averaged intensity less 0.1% that field. Under 2.33 (532 increases rapidly, time constant 30 μs. By...