Browsing by Issue Date, starting with "2014-01-21"

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氟硫化物黃光螢光材料、製備方法及其白光發光二極體
(2014-01-21)
陳登銘
;
吳昀錚
本發明揭露一種新穎的氟硫化物黃光螢光材料，其具有(A1-x-yCexBy)2Ca1-zSrzF4S2化學通式及四方晶系結構。其中的A及B可為除了Ce之外之相異的稀土金屬，且x、y、z的數值範圍分別為0<x≦1，0≦y≦1與0≦z≦1。另揭露上述螢光材料之製備方法及其白光發光二極體之應用。
結合矽奈米線閘極二極體之感測元件、製造方法及其檢測系統
(2014-01-21)
許鉦宗
;
陳振嘉
本發明係揭露一種結合矽奈米線閘極二極體之感測元件、製造方法及其檢測系統。此感測元件包含一矽奈米線閘極二極體、一頓化層以及一微流道。頓化層包覆此矽奈米線蕭特基二極體且具有一經修飾之表面，微流道與頓化層接合。當一待測樣品透過該微流道接觸此經修飾之表面時，矽奈米線閘極二極體係相對應地產生一電性訊號，如電流值、電阻值或電導值變化，藉此此電性訊號之變化以檢測待測樣品之存在。
Triplet superconductivity in 3D Dirac semi-metal due to exchange interaction
(2014-01-21)
Rosenstein, Baruch
;
Shapiro, B. Ya
;
Li, Dingping
;
Shapiro, I.
;
電子物理學系
Conventional phonon-electron interaction induces either triplet or one of two (degenerate) singlet pairing states in time reversal and inversion invariant 3D Dirac semi-metal. Investigation of the order parameters and energies of these states at zero temperature in a wide range of values of chemical potential mu, the effective electron-electron coupling constant. and Debye energy T-D demonstrates that when the exchange interaction is neglected the singlet always prevails, however, in significant portions of the (mu, lambda, T-D) parameter space the energy difference is very small. This means that interactions that are small, but discriminate between the spin singlet and the spin triplet, are important in order to determine the nature of the superconducting order there. The best candidate for such an interaction in the materials under consideration is the exchange (the Stoner term) characterized by constant lambda(ex). We show that at values of lambda(ex), much smaller than ones creating Stoner instability to ferromagnetism lambda(ex) similar to 1, the triplet pairing becomes energetically favored over the singlet ones. The 3D quantum critical point at mu = 0 is considered in detail. This can be realized experimentally in optically trapped cold atom systems.
粒子顯示器之顯示三色之畫素驅動結構之顯色方法
(2014-01-21)
范士岡
;
許青翔
;
邱誠樸
;
莫啟能
;
江美昭
本發明關於粒子顯示器之顯示三色之畫素驅動結構及其顯色方法。畫素驅動結構包括一第一基板；一第一電極層設於第一基板；一粒子溶液，設於第一電極層之一側，且具有第一顏色溶液、複數第二顏色正電粒子及複數第三顏色負電粒子；一第二電極層設於粒子溶液之一側；一第二基板設於第二電極層；及一交直流電源供應器電性連接於第一及第二電極層。顯色方法之步驟為施加一交流電壓以顯示出第一顏色；施加一第一直流電壓以顯示出第三顏色；及施加一第二直流電壓以顯示出第二顏色。本發明讓畫素驅動結構顯示三色，使電子紙顯示之畫面具色彩多樣性。
Method for dynamically setting environmental boundary in image and method for instantly determining human activity
(2014-01-21)
Song Kai-Tai
;
Chen Wei-Jyun
The present invention provides a method for dynamically setting an environmental boundary in an image and a method for instantly determining human activity according to the method for dynamically setting the environmental boundary. The method for instantly determining human activity includes the steps of retrieving at least an initial environmental image with a predetermined angle, and calculating a boundary setting equation of an object and an environmental boundary in the initial environmental image; retrieving a dynamic environmental image having the object by using a movable platform, and figuring out a new environmental boundary; determining a human image in the dynamic environmental image, recording retention time of the human image, and determining a human posture; and determining human location according to the environmental boundary in the dynamic environmental image and the human image, and instantly determining the human activity.
可調式電極植入系統及其可調式電極植入裝置
(2014-01-21)
蔡德明
;
徐建華
本發明係揭露一種可調式電極植入系統及其可調式電極植入裝置，可調式電極植入系統包含一可調式電極植入裝置及一調整裝置。調整裝置係用以調整可調式電極植入裝置之位置。可調式電極植入裝置包含一植入本體、多個電極與多個磁性體。電極分布於植入本體，並根據一控制訊號來提供多個刺激電流；磁性體則依序結合於電極。調整裝置包含一控制單元、一激磁單元與至少一磁力單元。控制單元係用以自多個磁性體中選擇至少一待移動磁性體，激磁單元則激磁待移動磁性體以產生一磁極；最後，磁力單元產生一磁場來驅動磁極，進而移動植入本體。
紅光和綠光之氟硫化物螢光材料、製備方法與其白光發光二極體裝置
(2014-01-21)
陳登銘
;
吳昀錚
本發明揭露一系列紅光與綠光之氟硫化物之螢光材料、製備方法與其白光發光二極體裝置。紅光與綠光之氟硫化物之螢光材料具有(A1-x-yCexBy)SF的化學通式，其中A與B為三價金屬離子，且0<x≦0.1與0≦y≦1。上述A為稀土金屬，B為稀土金屬或第13族金屬。
生理訊號蒐集單元及其探頭
(2014-01-21)
邱俊誠
;
黃煜傑
一種生理訊號蒐集單元，搭配一生理訊號量測設備量測一覆蓋有毛髮之受測部位的生理訊號，並包含一彈性束縛體及至少一探頭。彈性束縛體供套戴於受測部位，開設有穿孔。探頭包括一圍繞界定出一通孔的電路基板，及設於該電路基板的電連接器與訊號蒐集元件。電路基板的外徑大於等於該彈性束縛體之穿孔的孔徑。使用時，受測部位之毛髮成束地穿伸於該電路基板的通孔，電路基板穿過穿孔而夾設於彈性束縛體與受測部位之間，訊號蒐集元件接觸該受測部位皮膚，該生理訊號量測設備導接電連接器且控制訊號蒐集元件運作而取得生理訊號。
The Elusive Three-Coordinate Dicationic Hydrido Boron Complex
(2014-01-22)
Chen, Wen-Ching
;
Lee, Ching-Yu
;
Lin, Bo-Chao
;
Hsu, Yu-Chen
;
Shen, Jiun-Shian
The formation of a hitherto unknown three-coordinate dicationic hydrido boron complex is described. Interestingly, supporting ligand carbodicarbene gave unprecedented reaction with BH3 without using more highly electrophilic Lewis acid precursors. Spectroscopic, crystallographic, and computational analysis was performed to understand the electronic features of these species.
Reducing Regioisomers of Fullerene-Bisadducts by Tether-Directed Remote Functionalization: Investigation of Electronically and Sterically Isomeric Effects on Bulk-Heterojunction Solar Cells
(2014-01-22)
Liao, Ming-Hung
;
Lai, Yin-Yu
;
Lai, Yu-Ying
;
Chen, Yen-Ting
;
Tsai, Che-En
C-60 bis-adduct containing a mixture of regio-isomers with different LUMO energy levels and steric geometries could greatly affect the morphological and bulk properties. To investigate the regio-isomer effect on solar cell performance, we have successfully designed and synthesized a regio-selective 4-acetatephenyl-4'-methylphenylmethano C-60 bis-adduct (S-APM-CBA) by "tether-directed remote functionalization" strategy and a random 4-acetatephenyl-4'-methylphenylmethano C-60 bis-adduct denoted as R-APM-CBA by traditional cyclopropanation. The dramatic reduction in the number of regio-isomers in S-APM-CBA is confirmed by the H-1 NMR and HPLC measurements and theoretical calculation. Compared to the R-APM-CBA-based device with a J(sc) of 6.63 mA/cm(2), an FF of 44.3% and a PCE of 2.46%, the device using S-APM-CBA yielded a much lower J(sc) of 1.48 mA/cm(2), an FF of 32.2%, and a PCE of 0.38%. Consistently, the electron-only device using S-AMP-CBA exhibited lower electron mobility than the R-AMP-CBA-based device. These results imply that the electronic shallow-trap effect ascribed to the LUMO energy variations turned out to be insignificant in the AMP-CBA system. The lower efficiency and mobility of S-AMP-CBA might due to the assumption that the most probable trans-4-III isomer in S-AMP-CBA prevents the intermolecular facial contact of fullerenes, thereby hindering the electron transporting. Furthermore, the nanomorphology of S-AMP-CBA and R-AMP-CBA active layers could be different because of their different three-dimensional structures. This research demonstrated that steric effect of regio-isomers in a given C-60 bis-adduct is more crucial than electronic shallow-trap effect.
Method For Selecting Transmitting Points In A Communication System
(2014-01-23)
Huang Chung-Jung
;
Sung Chih-Sheng
;
Lee Ta-sung
The present invention provides a method for identifying a specific number of communicating points having relatively smallest accumulated path values from a plurality of transmitting points for a receiving point in a communication system. The method includes steps of: (a) defining a first coordination of each of the plurality of transmitting points and the receiving point on a complex plane; (b) transferring the first coordination of the receiving point to a second coordination thereof, in which the second coordination of the receiving point is near an origin of the complex plane; and (c) identifying the specific number of transmitting points having relatively smallest accumulated path values based on the second coordination of the receiving point.
Ultrahigh-Gain Photodetectors Based on Atomically Thin Graphene-MoS2 Heterostructures
(2014-01-23)
Zhang, Wenjing
;
Chuu, Chih-Piao
;
Huang, Jing-Kai
;
Chen, Chang-Hsiao
;
Tsai, Meng-Lin
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) is also known as light-sensitive. Here we show that a large-area and continuous MoS2 monolayer is achievable using a CVD method and graphene is transferable onto MoS2. We demonstrate that a photodetector based on the graphene/MoS2 heterostructure is able to provide a high photogain greater than 108. Our experiments show that the electron-hole pairs are produced in the MoS2 layer after light absorption and subsequently separated across the layers. Contradictory to the expectation based on the conventional built-in electric field model for metal-semiconductor contacts, photoelectrons are injected into the graphene layer rather than trapped in MoS2 due to the presence of a perpendicular effective electric field caused by the combination of the built-in electric field, the applied electrostatic field, and charged impurities or adsorbates, resulting in a tuneable photoresponsivity.
New free-air and Bouguer gravity fields of Taiwan from multiple platforms and sensors
(2014-01-25)
Hwang, Cheinway
;
Hsu, Hung-Jui
;
Chang, Emmy T. Y.
;
Featherstone, W. E.
;
Tenzer, Robert
We construct 1' x 1' grids of free-air and Bouguer gravity anomalies around Taiwan with well-defined error estimates for quality assessment. The grids are compiled from land, airborne and shipbome gravity measurements, augmented with altimeter gravity at sea. Three sets of relative land gravity measurements are network-adjusted and outlier-edited, yielding accuracies of 0.03-0.09 mGal. Three airborne gravity sets are collected at altitudes 5156 and 1620 m with accuracies of 2.57-2.79 mGal. Seven offshore shipborne gravity campaigns around Taiwan and its offshore islands yield shallow-water gravity values with 0.88-2.35 mGal accuracies. All data points are registered with GPS-derived geodetic coordinates at cm-dm accuracies, allowing for precise gravity reductions and computing gravity disturbances. The various datasets are combined by the band-limited least-squares collocation in a one-step procedure. In the eastern mountainous (or offshore) region, Bouguer anomalies and density contrasts without considering the oceanic (or land) topographic contribution are underestimated. The new grids show unprecedented tectonic features that can revise earlier results, and can be used in a broad range of applications. (C) 2013 Elsevier B.V. All rights reserved.
Forming-free bipolar resistive switching in nonstoichiometric ceria films
(2014-01-27)
Ismail, Muhammad
;
Huang, Chun-Yang
;
Panda, Debashis
;
Hung, Chung-Jung
;
Tsai, Tsung-Ling
The mechanism of forming-free bipolar resistive switching in a Zr/CeO (x) /Pt device was investigated. High-resolution transmission electron microscopy and energy-dispersive spectroscopy analysis indicated the formation of a ZrO (y) layer at the Zr/CeO (x) interface. X-ray diffraction studies of CeO (x) films revealed that they consist of nano-polycrystals embedded in a disordered lattice. The observed resistive switching was suggested to be linked with the formation and rupture of conductive filaments constituted by oxygen vacancies in the CeO (x) film and in the nonstoichiometric ZrO (y) interfacial layer. X-ray photoelectron spectroscopy study confirmed the presence of oxygen vacancies in both of the said regions. In the low-resistance ON state, the electrical conduction was found to be of ohmic nature, while the high-resistance OFF state was governed by trap-controlled space charge-limited mechanism. The stable resistive switching behavior and long retention times with an acceptable resistance ratio enable the device for its application in future nonvolatile resistive random access memory (RRAM).
Polarized emission of quantum dots in microcavity and anisotropic Purcell factors
(2014-01-27)
Lee, Yi-Shan
;
Lin, Sheng-Di
;
電子工程學系及電子研究所
;
Department of Electronics Engineering and Institute of Electronics
We study the polarization properties of quantum dot (QD) emission coupled with the fundamental cavity modes. A rotation of polarization axis and a change of polarization degree are observed as the coupling is varied. To explain this observation, we derive an analytical model considering the polarization misalignment between QD dipole and cavity mode field. Our model also provides a new approach to extract the anisotropic Purcell factors by analyzing the polarization of detected quantum dot emission coupled to the cavity mode, which paves the way to develop high-efficiency polarized single photon sources. (C) 2014 Optical Society of America
Resonant modes of 12-fold symmetric defect free photonic quasicrystal
(2014-01-27)
Chen, Minfeng
;
Li, Yun-Jing
;
Cheng, Yuh-Jen
;
Chang, Yai-Chung
;
Chang, Chun-Yen
This work investigates the resonant modes of a 12-fold symmetric defect free photonic quasicrystal (PQC) nanorod array using finite difference time domain (FDTD) simulation. Localized modes can exist in PQC without introducing defects due to the lack of translational symmetry. The resonant modes of the unit cell PQC and the one time expanded PQC from unit cell are systematically examined. The resonant spectrum is that of a single rod modified by the interaction among PQC nanorods. The mode confinement is contributed by guided resonance and destructive interference scattering. The self-scaling similarity of resonant spectrum and mode profile are also investigated. (C) 2014 Optical Society of America
Method for carry estimation of reduced-width multipliers
(2014-01-28)
Liao Yen-Chin
;
Chang Hsie-Chia
A low-error reduced-width multiplier is provided by the present invention. The multiplier can dynamically compensate the truncation error. The compensation value is derived by the dependencies among the multiplier partial products, and thus, can be analyzed according to the multiplication type and the multiplier input statistics.
Elliptic flow from thermal photons with magnetic field in holography
(2014-01-28)
Mueller, Berndt
;
Wu, Shang-Yu
;
Yang, Di-Lun
;
物理研究所
;
丘成桐中心
We compute the elliptic flow v(2) of thermal photons in a strongly coupled plasma with constant magnetic field via gauge/gravity duality. The D3/D7 embedding is applied to generate the contributions from massive quarks. By considering the cases in 2 + 1 flavor super Yang-Mills analogous to the photon production in quark gluon plasma, we obtain the thermal photon v(2), which is qualitatively consistent with the direct photon v(2) measured at the relativistic heavy ion collider at intermediate energy. However, due to the simplified setup, the thermal photon v(2) in our model should be regarded as the upper bound for the v(2) generated by solely a magnetic field in the strongly coupled scenario.
Communication: Three-dimensional model for phonon confinement in small particles: Quantitative bandshape analysis of size-dependent Raman spectra of nanodiamonds
(2014-01-28)
Korepanov, Vitaly I.
;
Witek, Henryk
;
Okajima, Hajime
;
Osawa, Eiji
;
Hamaguchi, Hiro-O
Raman spectroscopy of nano-scale materials is facing a challenge of developing a physically sound quantitative approach for the phonon confinement effect, which profoundly affects the phonon Raman band shapes of small particles. We have developed a new approach based on 3-dimensional phonon dispersion functions. It analyzes the Raman band shapes quantitatively in terms of the particle size distributions. To test the model, we have successfully obtained good fits of the observed phonon Raman spectra of diamond nanoparticles in the size range from 1 to 100 nm. (C) 2014 AIP Publishing LLC.
Coupling between Protein Conformation and Local Unfolding Highlights the Role of Disorder in Protein Function and Suggests a New Target for Tuberculosis Treatment
(2014-01-28)
Morrell, Thomas E.
;
Rafalska-Metcalf, Ilona U.
;
Chu, Jhih-Wei
;
Yang, Haw
;
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