Browsing by Issue Date, starting with "2012-12-17"

Now showing 1 - 20 of 34649

Nonequilibrium noise correlations in a point contact of helical edge states
(2012-12-17)
Lee, Yu-Wen
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Lee, Yu-Li
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Chung, Chung-Hou
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電子物理學系
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Department of Electrophysics
We investigate theoretically the nonequilibrium finite-frequency current noise in a four-terminal quantum point contact of interacting helical edge states at a finite bias voltage. Special focus is put on the effects of the single-particle and two-particle scattering between the two helical edge states on the fractional charge quasiparticle excitations shown in the nonequilibrium current noise spectra. Via the Keldysh perturbative approach, we find that the effects of the single-particle and the two-particle scattering processes on the current noise depend sensitively on the Luttinger liquid parameter. Moreover, the Fano factors for the auto-and cross correlations of the currents in the terminals are distinct from the ones for tunneling between the chiral edge states in the quantum Hall liquid. The current noise spectra in the single-particle-scattering-dominated and the two-particle-scattering-dominated regime are shown. Experimental implications of our results on the transport through the helical edges in two-dimensional topological insulators are discussed. DOI: 10.1103/PhysRevB.86.235121
Multinary Selenides with Unusual Coordination Environment of Bismuth
(2012-12-17)
Chung, Ming-Yan
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Lee, Chi-Shen
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應用化學系
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Department of Applied Chemistry
New multinary selenides Ae(3)SnPn(2)Se(8) (Ae = Sr, Ba; Pn = Sb, Bi), Sr8.01Ge2.04Bi7.95Se24, and Sr8YGe2Bi7Se24 were synthesized by solid-state reaction, and their structures were determined by single-crystal X-ray diffraction. These compounds crystallize in orthorhombic space group Pnma (no. 62) for Ae(3)SnPn(2)Se(8) (Ae = Sr, Ba; Pn = Sb, Bi) and in Pna2(1) (no. 33) for Sr8.01Ge2.04Bi7.95Se24 and Sr8YGe2Bi7Se24. The structures feature one-dimensional corner sharing tetrahedral (1)(infinity)[MSe3] units, and one-dimensional edge sharing octahedral (1)(infinity)[M4Se10], packed with the alkaline earth or rare earth cations. Sr8.01Ge2.04Bi7.95Se24 and Sr8YGe2Bi7Se24 contain a triple cell superlattice structure derived from a special arrangement of Bi and Ge in the tetrahedrally coordinated (1)(infinity)[MSe3] chain. Diffuse reflectance spectra and electronic resistivity measurements indicate semiconducting behaviors; the Sr8YGe2Bi7Se24 Seebeck coefficient is -180 mu V/K at 303 K Electronic structure calculations confirm that the electron count for Sr8YGe2Bi7Se24 is optimal for interatomic bonding in the ionic network.
如是英雄：談萊蒙托夫的《當代英雄》
(2012-12-19)
鄢定嘉
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開放教育推動中心
;
Open Education Office
課程首頁本課程是由交通大學新文藝復興閱讀計畫提供。 96 年 8 月當各大學紛紛摩拳擦掌準備迎接新生的同時，交通大學校長吳重雨則因為一則來自於七月份泰晤士報，有關於英國首相布朗公布其夏日讀書清單的新聞中，看到了他對知識的尊重。在這同時，吳重雨校長也思考著，要如何為學生準備追求知識的環境和激發他們對知識的尊重與喜愛。台積電張忠謀董事長曾陳述他 18 歲進入哈佛那一年，博覽文史哲理工經典群籍，至此奠定了他求知的基礎，並借海明威名言，將其改為「哈佛這一年為人生可帶走的盛宴。」吳重雨校長以張董事長的學習為借鏡，認為學生固然能藉由自我閱讀的方式學習到豐沛的知識，但透過名人、大師親臨現場地介紹經典書籍，更能加深學子們對於書籍的認識與興趣，這也是「新文藝復興閱讀計劃」 ( 以下簡稱 : 「經典名著選讀」 ) 活動展開籌劃的緣由。於是，吳重雨校長便積極敦請「交大通識教育委員會」，接手籌備本計劃的相關活動，而該中心也成為實際施行本計畫的策動、開課以及認證單位。至此，期許交大學子藉由閱讀、聽講來提昇人文素養、開拓視野的「新文藝復興閱讀計劃」，就此展開。
Resonant-Enhanced Full-Color Emission of Quantum-Dot-Based Display Technology Using a Pulsed Spray Method
(2012-12-19)
Chen, Kuo-Ju
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Chen, Hsin-Chu
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Tsai, Kai-An
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Lin, Chien-Chung
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Tsai, Hsin-Han
Colloidal quantum-dot light-emitting diodes (QDLEDs) with the HfO2/SiO2-distributed Bragg reflector (DBR) structure are fabricated using a pulsed spray coating method. Pixelated RGB arrays, 2-in. wafer-scale white light emission, and an integrated small footprint white light device are demonstrated. The experimental results show that the intensity of red, green, and blue (RGB) emission exhibited considerable enhancement because of the high reflectivity in the UV region by the DBR structure, which subsequently increases the use in the UV optical pumping of RGB QDs. A pulsed spray coating method is crucial in providing uniform RGB layers, and the polydimethylsiloxane (PDMS) film is used as the interface layer between each RGB color to avoid cross-contamination and self-assembly of QDs. Furthermore, the chromaticity coordinates of QDLEDs with the DBR structure remain constant under various pumping powers in the large area sample, whereas a larger shift toward high color temperatures is observed in the integrated device. The resulting color gamut of the proposed QDLEDs covers an area 1.2 times larger than that of the NTSC standard, which is favorable for the next generation of high-quality display technology.
Epitaxial Magnetic Oxide Nanocrystals Via Phase Decomposition of Bismuth Perovskite Precursors
(2012-12-19)
Bogle, Kashinath A.
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Cheung, Jeffrey
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Chen, Yong-Lun
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Liao, Sheng-Chieh
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Lai, Chih-Hung
The phase instability of bismuth perovskite (BiMO3), where M is a ferromagnetic cation, is exploited to create self-assembled magnetic oxide nanocrystal arrays on oxide supports. Conditions during pulsed laser deposition are tuned so as to induce complete breakdown of the perovskite precursor into bismuth oxide (Bi2O3) and metal oxide (M-Ox) pockets. Subsequent cooling in vacuum volatizes the Bi2O3 leaving behind an array of monodisperse nanocrystals. In situ reflective high energy electron diffraction beam is exploited to monitor the synthesis in real-time. Analysis of the patterns confirms the phase separation and volatization process. Successful synthesis of M-Ox, where M = Mn, Fe, Co, and Cr, is shown using this template-free facile approach. Detailed magnetic characterization of nanocrystals is carried out to reveal the functionalities such as magnetic anisotropy as well as larger than bulk moments, as expected in these oxide nanostructures.
Lens Device and Method of Manufacturing the Same
(2012-12-20)
Hung Kuo-Yung
;
Tseng Fan-Gang
A lens device and a method of manufacturing the same are provided, wherein the lens device includes a transparent substrate, a metal layer, a hydrophobic layer and an aspherical lens. The metal layer is formed on the transparent substrate, and the hydrophobic layer is formed on the metal layer. The metal layer has a first opening, such that an area of the transparent substrate corresponding to the first opening is not covered by the metal layer. The hydrophobic layer has a second opening connected to the first opening, and the second opening is larger than the first opening, such that a portion of the metal layer adjacent to a peripheral edge of the first opening is not covered by the hydrophobic layer. The aspherical lens is formed on the area of the transparent substrate and contacts the portion of the metal layer.
Method and Non-Transitory Computer Readable Medium Thereof for Thermal Analysis Modeling
(2012-12-20)
Chen Chien-Chang
;
Cheng Yu-Ting
A method and a non-transitory computer readable medium thereof for thermal analysis modeling are provided. The method includes establishing an electrothermal network π model on the basis of electronic modules of an electronic system to define a heat source, propagation paths and a common base of the electronic system. Observation points in the electronic system are defined, in which each observation point is located at an isothermal surface enclosing a volume surrounding a reference point, and where the reference point is the heat source or one observation point. A heat conduction temperature difference and a heat convection temperature difference are calculated according to a power density function, a thermal conductivity coefficient and a distance vector between the reference point and each observation point. A temperature distribution is established according to the heat conduction and the heat convection temperature difference and a defined temperature of the common base.
交大e-News第132期
(2012-12-20)
Secretariat
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國立交通大學秘書室
VIDEO OBJECT LOCALIZATION METHOD USING MULTIPLE CAMERAS
(2012-12-20)
LO Kuo-Hua
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CHUANG Jen-Hui
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LIN Horng-Horng
An efficient 3D object localization method using multiple cameras is provided. The proposed method comprises a three-dimensional object localization process that firstly generates a plurality of two-dimensional line samples originated from a pre-calibrated vanishing point in each camera view for representing foreground video objects, secondly constructs a plurality of three-dimensional line samples from the two-dimensional line samples in all the multiple camera views, and thirdly determines three-dimensional object to locations by clustering the three-dimensional line samples into object groups.
可辨識生物特徵的蓋印系統及蓋印圖章的方法
(2012-12-21)
黃經堯
;
程士恒
一種可辨識生物特徵的蓋印系統，包含一蓋印裝置、一生物特徵感測模組、一記憶單元及一控制單元；該蓋印裝置可接受控制而於一可供蓋印出一圖章的蓋印狀態，及一無法蓋印出該圖章的非蓋印狀態之間切換；該生物特徵感測模組是用以感測並擷取一使用該蓋印裝置的使用者的一生物特徵；該記憶單元儲存有一筆特定的特徵資料；該控制單元是用以比對該生物特徵與該特定的特徵資料是否相符，若相符，則控制該蓋印裝置呈該蓋印狀態，若不相符，則控制該蓋印裝置呈非蓋印狀態。
應用於染料敏化太陽能電池之紫質光敏染料
(2012-12-21)
葉鎮宇
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刁維光
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李政緯
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呂學沛
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藍啟銘
本發明係有關於應用於染料敏化太陽能電池之光敏染料，此光敏染料為一基於紫質的鋅金屬錯合物，其通用分子式如式(100)或(200)所示。 100 200 其中A係表示式(111)～(118)其中之一， 111 112 113 114 115 116 117 118 其中Z1~Z10分別獨立地表示為H、Li、Na、或四烷基銨基(其結構如下列的式(120)所示)，其中X1~X4分別獨立地表示CmH2m+1(m=1~6)，其中B、C、D、E係相同或不同的取代基，選自於式(131)~(140)組成的群組，其中，Ra~Rz係獨立地選自於由H、CmH2m+1(m=1~15)、OCpH2p+1(p=1~15)、CH2[OC2H4]nOCH3(n=1~30)、及[OC2H4]qOCH3(q=1~30)組成的群組。
具有非極性三族-氮化物層的多層結構及其製法
(2012-12-21)
李威儀
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陳振芳
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江振豪
一種具有非極性三族-氮化物層的多層結構及其製法，包括在基板上形成複數成核層；以及於該成核層上形成非極性三族-氮化物層，其中，各該複數成核層係獨立選自下式(I)之氮化物： AxB1-xN (I) 式中，A和B係選自B、Al、Ga、IN或Tl之不相同的元素，且0≦x≦1。該複數成核層可有效減緩應力、減少晶格位差、阻擋差排延伸並降低差排密度，故可形成表面平坦且結晶品質佳之三族-氮化物層。
定位定量黏著封裝方法
(2012-12-21)
邱俊誠
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侯冠州
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林君穎
;
張志瑋
有鑑於習知流體自組裝技術利用親疏水性材料來輔助微小元件定位，本發明提出一種定位定量黏著封裝方法，也就是先將液態膠定位方法，本發明先將第一基板劃分出親水性區域與疏水性區域，點上液態膠於第一基板親水區域上，再利用第二基板靠近第一基板，先保留一間隙於兩基板間，使液態膠藉由毛細現象之吸引力流動分佈於親水性區域，最後，選擇是否將第二基板移開或接合第一基板，若選擇後者，可將第二基板做微流道或置容孔之設計，以有助於後段製程時微小晶粒之定位，並且可防止溢膠的情況產生。
串流影音資料傳輸控制方法及其架構
(2012-12-21)
黃經堯
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陳志展
;
李純孝
本發明提供一種串流影音資料傳輸控制方法及其架構，其利用傳輸端一回報傳輸速率改善接收端播放延遲的情況。回報傳輸速率係依據前週期傳輸暫存器之資料剩餘量以及實際傳輸速率而定。而實際傳輸速率則為需求傳輸速率與可用傳輸速率之較小者，其中需求傳輸速率係依據資料剩餘量及回報傳輸速率決定。因此，回報傳輸速率可隨著資料剩餘量的累積而調整，有效改善發生播放延遲的情況。
Anharmonic coupling of the CH-stretch and CH-bend vibrations of chloroform as studied by near-infrared electroabsorption spectroscopy
(2012-12-21)
Nishida, Jun
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Shigeto, Shinsuke
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Yabumoto, Sohshi
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Hamaguchi, Hiro-o
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應用化學系
Combination bands that involve CH- or OH-stretch vibrations appear in the near-infrared (NIR) region (4000-10 000 cm(-1)). Because they arise from anharmonic coupling between the component fundamentals, detailed analysis of the frequency and intensity of NIR combination bands allows one to elucidate the mechanisms behind the vibrational coupling in the condensed phase in terms of mechanical and electrical anharmonicities. Nevertheless, little has been studied, in particular experimentally, on the origin of the combination band intensity. Here, we show that NIR electroabsorption (EA) spectroscopy, which directly probes the effects of an externally applied electric field on a combination band, can shed new light on anharmonic vibrational coupling through determination of the direction of the transition moment for the combination band. We studied the combination band of the CH-stretch (nu(1)) and CH-bend (nu(4)) modes of liquid chloroform. The electric-field induced absorbance change of the nu(1) + nu(4) combination band caused by reorientation of the chloroform molecule was measured at various chi angles, where chi is the angle between the direction of the applied electric field and the polarization of the incident IR light. We were able to detect an absorbance change as small as 5 x 10(-8) for the combination band. Using the NIR EA spectra of the combination band together with those of the CH-stretch and bend fundamentals, the angle between the transition moment for the combination band and the permanent dipole moment was determined experimentally for the first time to be (79 +/- 14)degrees. The present investigation indicates that the contribution of the CH-stretch mode to the mechanical anharmonicity is minor and that the CH-bend mode plays a dominant role in the mechanical part of the vibrational coupling between the two fundamentals. Furthermore, density functional theory calculations show that both the mechanical anharmonicity of the CH-bend mode and the electrical anharmonicity may contribute equally to the anharmonic coupling. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4770264]
Infrared absorption of methanethiol clusters (CH3SH)(n), n=2-5, recorded with a time-of-flight mass spectrometer using IR depletion and VUV ionization
(2012-12-21)
Fu, Lung
;
Han, Hui-Ling
;
Lee, Yuan-Pern
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應用化學系
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應用化學系分子科學碩博班
We investigated IR spectra in the CH- and SH-stretching regions of size-selected methanethiol clusters, (CH3SH)(n) with n = 2-5, in a pulsed supersonic jet using infrared (IR)-vacuum ultraviolet (VUV) ionization. VUV emission at 132.50 nm served as the source of ionization in a time-of-flight mass spectrometer. Clusters were dissociated with light from a tunable IR laser before ionization. The variations in intensity of methanethiol cluster ions (CH3SH)(n)(+) were monitored as the IR laser light was tuned across the range 2470-3100 cm(-1). In the SH-stretching region, the spectrum of (CH3SH)(2) shows a weak band near 2601 cm(-1), red-shifted only 7 cm(-1) from that of the monomer. In contrast, all spectra of (CH3SH)(n), n = 3-5, show a broad band near 2567 cm(-1) with much greater intensity. In the CH-stretching region, absorption bands of (CH3SH)(2) are located near 2865, 2890, 2944, and 3010 cm(-1), red-shifted by 3-5 cm(-1) from those of CH3SH. These red shifts increase slightly for larger clusters and bands near 2856, 2884, 2938, and 3005 cm(-1) were observed for (CH3SH)(5). These spectral results indicate that the S-H center dot center dot center dot S hydrogen bond plays an important role in clusters with n = 3-5, but not in (CH3SH)(2), in agreement with theoretical predictions. The absence of a band near 2608 cm(-1) that corresponds to absorption of the non-hydrogen-bonded SH moiety and the large width of observed feature near 2567 cm(-1) indicate that the dominant stable structures of (CH3SH)(n), n = 3-5, have a cyclic hydrogen-bonded framework. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4770227]
一種生物感測器
(2012-12-21)
孟心飛
;
洪勝富
;
趙宇強
;
洪韻茹
;
蔡佩妤
一種應用於生物感測環境之生物感測器，且為一可在液態環境下進行偵測的固態元件。本發明之生物感測器至少包含生物感測層、發光二極體、以及光偵測二極體；生物感測層於吸收、吸附及/或鍵結來自於生物體內部訊息傳遞時所釋放出的生物物質後，將導致其本身之發光性質之改變，經由發光二極體因激發所產生之光線的作用，致使生物感測層放出螢光；此些螢光經光偵測二極體吸收後，被轉變成可判讀的光電流訊號，進而，藉由光電流訊號之判讀而得知生物體內訊息交換之含意。
具懸浮式奈米通道之電晶體結構與其製造方法
(2012-12-21)
林鴻志
;
蘇俊榮
;
徐行徽
;
李冠樟
一種具懸浮式奈米通道之電晶體結構與其製造方法，其包含有一基底；一位於基底上的側閘極；一覆蓋於基底與側閘極上的介電層；一位於側閘極之側邊的懸浮式奈米線通道，其與介電層間具有一氣隙；以及一源極電極與一汲極電極，其係設置於介電層上且分設於懸浮式奈米線通道的兩端。藉由側閘極之靜電力對懸浮式奈米線通道之吸附或分離，來達到快速改變等效側閘極介電層厚度，而使元件在開關狀態上快速切換或改變通道之起始電壓。
有機光敏性光電裝置
(2012-12-21)
孟心飛
;
洪勝富
;
曾信榮
;
陳恩禎
;
朱家宏
一種有機光敏性之光電裝置，包括陽極；形成於該陽極上之包括供體部和受體部之有機光敏層；形成於該有機光敏層上之電洞阻擋層，使該有機光敏層夾置於該陽極和該電洞阻擋層之間；以及形成於該電洞阻擋層上之陰極，使該電洞阻擋層夾置於該陰極和該有機光敏層之間。此外，視需要地，該電洞阻擋層之最高電子佔據能階(HOMO)大於該供體部之最高電子佔據能階至少0.3eV。本發明之光電裝置有效地抑制暗電流以提升應用於偵測器時的靈敏度。
深度烘焙出的　劉德禮
(2012-12-23)
張芮瑜
;
Department of Communication and Technology
;
傳播與科技學系
「如果我不在家，就是在咖啡館；如果不是在咖啡館，就是在往咖啡館的路上。」這句話被文青掛在嘴邊、被作家寫進書。劉德禮，不是一個附庸風雅的文人雅士，卻成為這句話的寫照。是一名咖啡師，也是一間咖啡館的主人。