Protrustech Corporation Ltd

East District, Taiwan

Protrustech Corporation Ltd

East District, Taiwan
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Chiang Y.-C.,National Chung Hsing University | Huang C.-T.,ProTrusTech Co. | Wang W.H.,ProTrusTech Co. | Chang C.-C.,National Chung Hsing University
Faraday Discussions | Year: 2017

This manuscript describes the preparation of water soluble aggregation-induced emission enhancement (AIEE)-based fluorescent organic nanoparticles (FONs). The fluorescence diversity of the FONs was investigated in the presence of silver nanowires. We observed that the emission of the FONs can be enhanced by mixing with the nanowires, which is believed to originate from resonance between the emission of the FONs and the surface plasmon resonances of the metal surface. That is, the AIEE phenomenon was promoted according to the metal-enhanced fluorescence (MEF) mechanism that can be used to build up a novel double emission enhancement (DEE) platform and to extend the range of AIEE applications. The systemic fluorescence enhancement, lifetime and photostability were measured and the AIEE-MEF evaluation and the interaction between the FONs and nanowires were discussed based on the obtained spectral data and SEM and fluorescent microscopy images. © The Royal Society of Chemistry 2017.


Ko C.-T.,National Taiwan University | Han Y.-Y.,National Taiwan University Hospital | Han Y.-Y.,National Taiwan University | Chen C.-H.,Protrustech Corporation Ltd | And 3 more authors.
Journal of Physical Chemistry C | Year: 2013

High-performance plasmonic ZnO/Al2O3 spacer/nano-Pt/Al2O3/substrate multilayer structures were prepared by atomic layer deposition, in which the localized surface plasmons (LSP) were supported by the uniformly dispersed nanostructured Pt (nano-Pt) layer and a precise Al2O3 spacer was introduced to suppress luminescence quenching. Over 100-fold enhancement of photoluminescence from the ZnO emitter, which facilitates the observation of significant quantum confinement effect in the nanoscale ZnO layer as thin as ∼2 nm, was achieved. The giant plasmonic enhancement can be deduced from the optimized Al2O3 spacer thickness, which leads to the reduced coupling with nonradiative high-order LSP modes as well as the overlap between the LSP resonance wavelength and the luminescence/absorbance spectra of the ZnO emitter. This plasmonic multilayer structure with high enhancement, accuracy, tunability, uniformity, and reproducibility can be further applied in sensitive bioassays/biosensing and efficient solid-state lighting. © 2013 American Chemical Society.


Chuang S.-H.,National University of Kaohsiung | Lin H.-C.,National University of Kaohsiung | Chen C.-H.,Protrustech Corporation Ltd
Journal of Alloys and Compounds | Year: 2012

Hafnium oxide powders were synthesized using the sol-gel method and further subjected to microwave treatment (MT) or conventional heat treatment (CT). The HfO 2 powders were transformed into a monoclinic phase with a small crystallite size when using MT at 350 °C and CT at 450 °C. Both methods gave products possessing photoluminescence (PL) emission bands at approximately 415 and 523 nm. Furthermore, the intensity of the PL was found correlate to the treatment temperature and to the concentration of oxygen vacancies in the powders. © 2012 Elsevier B.V. All rights reserved.


Lin M.C.,National Taiwan University | Lin M.C.,Taipei Medical University | Nien L.-W.,National Taiwan University | Chen C.-H.,Protrustech Corporation Ltd | And 3 more authors.
Applied Physics Letters | Year: 2012

An approach was proposed to characterize nanoscale ultrathin films using surface enhanced Raman scattering (SERS). Raman spectroscopy of the TiO 2 film as thin as ∼2 nm, which was prepared by atomic layer deposition, was obtained by depositing a nanostructured Au layer on the film surface. Red-shift in the extinction spectrum of the nanostructured Au layer was observed with increasing TiO 2 film thickness, ascribed to the increase in effective refractive index of the substrate slab and coupled plasmon resonance. This SERS technique can be applied to investigate a variety of solid-state ultrathin films in nanosclae materials and devices in future studies. © 2012 American Institute of Physics.


Chen L.-Y.,National Taiwan University of Science and Technology | Yin Y.-T.,National Taiwan University of Science and Technology | Chen C.-H.,Protrustech Corporation Ltd | Chiou J.-W.,National Taiwan University
Journal of Physical Chemistry C | Year: 2011

In this study, ZnO nanowire arrays were prepared using a hydrothermal method. During growth, polyethyleneimine (PEI) and ammonia were added to adjust the structure and optical properties of the ZnO nanowires. Emission analysis revealed visible photoluminescence emissions from ZnO nanowires produced under various growth conditions. To correlate the relationship between visible emissions and structural defects in ZnO nanowires, we employed X-ray absorption spectroscopy (XAS) to characterize the coordination number and bond length of the ZnO nanowires. On the basis of analytical results, we determined that the red emission is attributed to interstitial zinc defects (Zni) and the yellow emission is attributed to interstitial oxygen defects (Oi). © 2011 American Chemical Society.


Chien J.-F.,National Taiwan University | Chen C.-H.,Protrustech Corporation Ltd | Shyue J.-J.,National Taiwan University | Shyue J.-J.,Academia Sinica, Taiwan | And 2 more authors.
ACS Applied Materials and Interfaces | Year: 2012

Nitrogen-doped ZnO (ZnO:N) films were prepared by remote plasma in situ atomic layer doping. X-ray photoelectron and absorption near-edge spectroscopies reveal the presence of Zn-N bond and a decrease in strength of the O 2p hybridized with Zn 4s states, which are consistent with the decrease of electron concentration in ZnO:N films with increasing nitrogen content and indicate the formation of acceptor states by occupation of oxygen sites with nitrogen. Linear dependence between the nitrogen content and the atomic layer doping percentage indicates the electrical properties and local electronic structures can be precisely controlled using this atomic layer doping technique. © 2012 American Chemical Society.


Tsai M.K.,Tungnan University | Huang C.C.,Tungnan University | Lee Y.C.,Tungnan University | Yang C.S.,Tatung University | And 4 more authors.
Journal of Luminescence | Year: 2012

In this study, we present morphology control investigations on zinc oxide (ZnO) nanorods synthesized by microwave heating of a mixture of zinc nitrate hexahydrate and hexamethylenetetramine (HMTA) precursors in deionized water (DI water). To study the morphology and structural variations of the obtained ZnO nanorods in different molar ratio of zinc nitrate hexahydrate to HMTA, X-ray diffraction (XRD), scanning electron microscopy (SEM) images, Raman scattering, and photoluminescence (PL) spectroscopy were measured. XRD and SEM images are utilized to examine the crystalline quality as well as the morphological properties of the ZnO nanorods. It is found that morphology control can be achieved by simply adjusting the reactant concentrations and the molar ratio of zinc nitrate hexahydrate to HMTA. Raman scattering and PL spectroscopy measurements were demonstrated to study the size- and shape-dependent optical response of the ZnO nanorods. The Raman scattering result shows that the intensity of LO mode at around 576 cm-1 decreases with the increase in the molar ratio of zinc nitrate hexahydrate to HMTA, indicating the reduction of defect concentrations in the synthesized ZnO nanorods. Room temperature PL spectrum of the synthesized ZnO nanorods reveals an ultraviolet (UV) emission peak and a broad visible emission. An enhancement of UV emission appears in the PL spectra as the molar ratio of zinc nitrate hexahydrate to HMTA increases, indicating that the defect concentration of the synthesized ZnO nanorods can be reduced by increasing the molar ratio. © 2011 Elsevier B.V. All rights reserved.


Chen L.-Y.,National Taiwan University of Science and Technology | Yang P.-A.,National Taiwan University of Science and Technology | Tseng C.-H.,National Taiwan University of Science and Technology | Hwang B.-J.,National Taiwan University of Science and Technology | And 2 more authors.
Applied Physics Letters | Year: 2012

CdSe xS 1-x quantum dots (QDs) were synthesized by a simple one-injection non-coordinate solvent method. The composition distribution of Se and S and the internal structures of the CdSe xS 1-x QDs can be tuned by the Se/S molar ratio. To investigate the internal structure of CdSe xS 1-x QD, x-ray absorption spectroscopy was used to examine the distribution of Se and S inside CdSe xS 1-x QDs. © 2012 American Institute of Physics.


Chen L.-Y.,National Taiwan University of Science and Technology | Chen C.-H.,Protrustech Corporation Ltd | Tseng C.-H.,National Taiwan University of Science and Technology | Lai F.-L.,National Taiwan University of Science and Technology | And 2 more authors.
Chemical Communications | Year: 2011

The photoluminescence quantum yield (PL-QY) of ternary colloidal CdSe xS1-x quantum dots (QDs), which were prepared by a one-injection method, enhances with increasing S content. The possible enhancement mechanism was explored by structural analysis via X-ray absorption near edge structure (XANES) and extended X-ray absorption fine structure (EXAFS). Both found that the enhancement of PL-QY of ternary CdSe xS1-x QDs strongly correlated with self-formed core/shell conformation in the non-coordination solution. © 2011 The Royal Society of Chemistry.


Patent
Protrustech Co. | Date: 2015-10-05

An integrated Raman spectrum measurement system and a modularized laser module are provided. The modularized laser module includes a laser emitter and an axis adjustment mechanism. The laser emitter is configured to emit a laser beam. The axis adjustment mechanism is connected to the laser emitter and configured to adjust at least two parameters of axis and orientation of the laser emitter. A beam splitter is disposed on the path of the laser beam. A signal collection unit is for collecting at least a part of a signal light from the beam splitter, wherein the signal light is converting by an object after receiving the part of the laser beam.

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