Browsing by Issue Date, starting with "2013-03-15"

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Growth, dielectric properties, and memory device applications of ZrO2 thin films
(2013-03-15)
Panda, Debashis
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Tseng, Tseung-Yuen
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電子工程學系及電子研究所
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Department of Electronics Engineering and Institute of Electronics
In the advancement of complementary metal-oxide-semiconductor device technology, SiO2 was used as an outstanding dielectric and has dominated the microelectronics industry for the last few decades. However, with the recent size downscaling, ultrathin SiO2 is no longer suitable. ZrO2 has been introduced as a high-k dielectric to replace SiO2. This paper reviews recent progress of ZrO2 thin films as dielectric layers for volatile dynamic random access memory ( DRAM) applications and as a gate dielectric for CMOS devices. Materials and electrical properties of ZrO2 films obtained by different deposition methods are compared. The effects of different top and bottom electrodes, and different doping elements, on ZrO2 dielectric properties are described. Applications discussed include the use of ZrO2 in Ge and SiGe nanocrystal-embedded nonvolatile flash memory devices. ZrO2 films as charge trapping layers in SOZOS (poly-Si/SiO2/ZrO2/SiO2/Si) and TAZOS (TaN/Al2O3/ZrO2/SiO2/Si) based nonvolatile flash memory stacks, and bipolar, unipolar, and nonpolar ZrO2-based resistive switching memory devices are also briefly discussed. The impact of electrode materials, metal nanocrystals, metal implantation, metal doping, metal layers, and oxide ion conductor buffer layer on resistive switching properties and switching parameters of emerging ZrO2-based resistive switching memory devices for high speed, low power, nanoscale, nonvolatile memory devices are briefly reviewed. A roadmap of the applications of ZrO2 thin film in future low power, nanoscale microelectronic device applications is realized from this review. (c) 2013 Elsevier B.V. All rights reserved.
Characteristics of high-water-uptake activated carbon/Nafion hybrid membranes for proton exchange membrane fuel cells
(2013-03-15)
Chien, Hung-Chung
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Tsai, Li-Duan
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Lai, Chien-Ming
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Lin, Jiunn-Nan
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Zhu, Chao-Yuan
A cost-effective and high-throughput method for producing high-water-uptake membranes is developed by combining high-porosity and superior-surface-area activated carbon with Nation. The resultant activated carbon/Nafion hybrid composite exhibits high water uptake and an improved proton conductivity, which can be exploited in a proton exchange membrane fuel cell (PEMFC). This hybrid membrane displays a superior performance to that of the commercial Nation 211 when used in fuel-cell measurements. Electrochemical impedance spectroscopy (EIS) is used to simulate the changes in resistance during the operation of the fuel cells and conclusively explains the improved performance of the composite membranes. (C) 2012 Elsevier B.V. All rights reserved.
Growth of N-Glycyl-L-Valine (GV) single crystal and its spectral, thermal and optical characterization
(2013-03-15)
Janarthanan, S.
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Samuel, R. Sugaraj
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Rajan, Y. C.
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Suresh, P.
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Thangaraj, K.
A nonlinear optical crystal of N-Glycyl-L-Valine (GV) single crystals was grown by slow evaporation solution growth technique from an aqueous solution. The unit cell parameters and the crystal structure were determined by single crystal X-ray diffraction study. The Fourier transform infrared (FTIR) and proton nuclear magnetic resonance (H-1 NMR) spectral studies were carried out to identify the functional groups of the grown crystals. The ultraviolet visible near infrared (UV-Vis-NIR) spectrum was recorded to study the optical transparency of the grown crystal. The thermogravimetric (TG) and differential thermal (DTA) analyses revealed the thermal stability of the sample. The presence of second harmonic generation (SHG) for the grown crystal was confirmed by Kurtz-Perry powder technique. (C) 2012 Elsevier B.V. All rights reserved.
12 GHz passive harmonic mode-locking in a 1.06 mu m semiconductor optical amplifier-based fiber laser with figure-eight cavity configuration
(2013-03-15)
Chen, Hou-Ren
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Lin, Kuei-Huei
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Tsai, Chih-Ya
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Wu, Hsiao-Hua
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Wu, Chih-Hsuan
We report the generation of passively harmonic mode-locked pulses using a 1.06 mu m semiconductor optical amplifier (SOA) in a figure-eight laser configuration operated in the all-normal-dispersion regime. Different orders of harmonic mode-locking can be obtained from 30 MHz to 12.02 GHz by changing the injection current of the SOA from 80 to 660 mA together with the adjustment of polarization controllers. The highest pulse repetition rate increases almost linearly with the SOA current. As SOA current is set to 660 mA, we obtain the intracavity power of 46 mW at the highest repetition rate of 12.02 GHz, corresponding to the 1202th harmonic of the fundamental mode-locking frequency. To our best knowledge, this is the lowest intracavity power to generate the highest repetition rate with a passively mode-locked laser in the all-normal-dispersion regime. (C) 2013 Optical Society of America
The burn-in test scheduling problem with batch dependent processing time and sequence dependent setup time
(2013-03-15)
Pearn, W. L.
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Hong, J. S.
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Tai, Y. T.
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工業工程與管理學系
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Department of Industrial Engineering and Management
The burn-in test scheduling problem (BTSP) is a variation of the complex batch processing machine scheduling problem, which is also a generalisation of the liquid crystal injection scheduling problem with incompatible product families and classical identical parallel machine problem. In the case we investigated on the BTSP, the jobs are clustered by their product families. The product families can be clustered by different product groups. In the same product group, jobs with different product families can be processed as a batch. The batch processing time is dependent on the longest processing time of those jobs in that batch. Setup times between two consecutive batches of different product groups on the same batch machine are sequentially dependent. In addition, the unequal ready times are considered in the BTSP which involves the decisions of batch formation and batch scheduling in order to minimise the total machine workload without violating due dates and the limited machine capacity restrictions. Since the BTSP involves constraints on unequal ready time, batch dependent processing time, and sequence dependent setup times, it is more difficult to solve than the classical parallel batch processing machine scheduling problem with compatible product families or incompatible product families. These restrictions mean that the existing methods cannot be applied into real-world factories directly. Consequently, this paper proposes a mixed integer programming model to solve the BTSP exactly. In addition, two efficient solution procedures which solve the BTSP are also presented.
Direct observation of quasi-coherent thermal emission by a three-dimensional metallic photonic crystal
(2013-03-15)
Hsieh, Mei-Li
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Bur, James
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Kim, Yong-Sung
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Lin, Shawn-Yu
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光電工程學系
We report a direct observation of a quasi-coherent thermal emission from a heated three-dimensional photonic-crystal sample. While the sample was under Joule heating, we observed multiple oscillations in its emission interferogram and deduced a coherent length of L-coh congruent to 20-40 mu m, 5-10 times longer than that of a blackbody at comparable wavelengths. The observed, relatively long coherent length is attributed to coupling of thermal emission into lossy Bloch modes that oscillate coherently over a distance determined by decay length and the slow light nature of Bloch modes at the band-edges. (C) 2013 Optical Society of America
Improved DNA detection by utilizing electrically neutral DNA probe in field-effect transistor measurements as evidenced by surface plasmon resonance imaging
(2013-03-15)
Chen, Wen-Yih
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Chen, Hon-Chen
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Yang, Yuh-Shyong
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Huang, Chun-Jen
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Chan, Hardy Wai-Hong
Intensive efforts have been focused on the development of ultrasensitive DNA biosensors capable of quantitative gene expression analysis. Various neutralized nucleic acids have been demonstrated as alternative and attractive probe for the design of a DNA chip. However, the mechanism of the improvements has not been clearly revealed. In this investigation, we used a newly developed neutral ethylated DNA (E-DNA), a DNA analog with the "RO-P-O" backbone (wherein R could be methyl, ethyl, aryl, or alkyl group) obtained from synthetic procedures, and a silicon nanowire (SiNW) field-effect transistor (FET) to evaluate the difference in DNA detection performance while using E-DNA and DNA as probes. It is demonstrated that using the E-DNA probe in the FET measurement could have a significantly enhanced effect upon the detection sensitivity. Surface plasmon resonance imaging (SPRi) was used to evidence the mechanism of the improved detection sensitivity. SPRi analysis showed the amounts of probe immobilization on the sensor surface and the hybridization efficiency were both enhanced with the use of E-DNA. Consequently, neutral ethylated DNA probe hold a great promise for DNA sensing, especially in the electrical-based sensor. (C) 2012 Elsevier B.V. All rights reserved.
Photoluminescent Gold Nanoclusters as Sensing Probes for Uropathogenic Escherichia coli
(2013-03-15)
Chan, Po-Han
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Ghosh, Bhaswati
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Lai, Hong-Zheng
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Peng, Hwei-Ling
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Mong, Kwok Kong Tony
Glycan-bound nanoprobes have been demonstrated as suitable sensing probes for bacteria containing glycan binding sites. In this study, we demonstrated a facile approach for generating glycan-bound gold nanoclusters (AuNCs). The generated AuNCs were used as sensing probes for corresponding target bacteria. Mannose-capped AuNCs (AuNCs@Mann) were generated and used as the model sensors for target bacteria. A one-step synthesis approach was employed to generate AuNCs@Mann. In this approach, an aqueous solution of tetrachloroauric acid and mannoside that functionized with a thiol group (Mann-SH) was stirred at room temperature for 48 h. The mannoside functions as reducing and capping agent. The size of the generated AuNCs@Mann is 1.95 +/- 0.27 nm, whereas the AuNCs with red photoluminescence have a maximum emission wavelength of similar to 630 nm (lambda(excitation) = 375 nm). The synthesis of the AuNCs@Mann was accelerated by microwave heating, which enabled the synthesis of the AuNCs@Mann to complete within 1 h. The generated AuNCs@Mann are capable of selectively binding to the urinary tract infection isolate Escherichia coli J96 containing the mannose binding protein FimH expressed on the type 1 pili. On the basis of the naked eye observation, the limit of detection of the sensing approach is as low as similar to 2 x 10(6) cells/mL.
Analysis of optical properties in cylindrical dielectric photonic crystal
(2013-03-15)
Hu, Chung-An
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Wu, Chien-Jang
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Yang, Tzong-Jer
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Yang, Su-Lin
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電子物理學系
In this work, theoretical formulas for the H-polarization electromagnetic propagation in a cylindrical multilayer structure (CMS) are given. The relationships between two modes, H- and E-polarization are pointed out. With the derived formulae, we present the numerical results for three model structures such as the single cylindrical interface, the single cylindrical slab, and the cylindrical photonic crystal (CPC). In the single cylindrical interface, it is found that there exists a Brewster starting radius at which a minimum reflectance is attained in H-polarization. In the single cylindrical slab, the result illustrates that the reflectance response in the wavelength domain contains the oscillating and nonoscillating regions. As for the CPC, we find the PBG structure at zero azimuthal mode number is very similar to that of planar photonic crystal. The PBG, however, can be strongly influenced by increasing the azimuthal mode number in a CPC. (C) 2012 Elsevier B.V. All ights reserved.
Three-dimensional analyses of stress singularities at the vertex of a piezoelectric wedge
(2013-03-15)
Huang, C. S.
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Hu, C. N.
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土木工程學系
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Department of Civil Engineering
The electroelastic singularities at the vertex of a rectilinearly polarized piezoelectric wedge are investigated using three-dimensional piezoelasticity theory. An eigenfunction expansion approach is combined with a power series solution technique to find the asymptotic solutions at the vertex of the wedge by directly solving the three-dimensional equilibrium and Maxwell's equations in terms of the displacement components and electric potential. This study is the first to address the problems in which the polarization direction of the piezoelectric material is not necessarily either parallel to the normal of the mid-plane of wedge or in the mid-plane. The correctness of the proposed solution is verified by convergence studies and comparison with the published results that are based on generalized plan strain assumption. The solution is further employed to study comprehensively the effect of the direction of polarization on the electroelastic singularities of wedges that contain a single material (PZT-5H), bounded piezo/isotropic elastic materials (PZT-5H/Si), or piezo/piezo materials (PZT-5H/PZT-4). (C) 2012 Elsevier Inc. All rights reserved.
A Novel Diketopyrrolopyrrole (DPP)-Based [2]Rotaxane for Highly Selective Optical Sensing of Fluoride
(2013-03-15)
Raju, Mandapati V. Ramakrishnam
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Lin, Hong-Cheu
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材料科學與工程學系
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Department of Materials Science and Engineering
A novel [2]rotaxane based on an orthogonal H-bonded motif and 3,6-di(thiophen-2-yl)pyrrolo[3,4-c]pyrrole-1,4(2H,5H)-dione (DPP) with controlled topicity was successfully constructed, displaying excellent stimulated responses toward anion and solvent polarity. The preorganized host selectively recognized F- with high optical sensitivity and reversibility via enhanced positive cooperativity and noncovalent interaction by evidence of a shorter fluorescence lifetime.
Label-free detection of DNA hybridization using transistors based on CVD grown graphene
(2013-03-15)
Chen, Tzu-Yin
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Phan Thi Kim Loan
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Hsu, Chang-Lung
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Lee, Yi-Hsien
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Wang, Jacob Tse-Wei
The high transconductance and low noise of graphene-based field-effect transistors based on large-area monolayer graphene produced by chemical vapor deposition are used for label-free electrical detection of DNA hybridization. The gate materials, buffer concentration and surface condition of graphene have been optimized to achieve the DNA detection sensitivity as low as 1 pM (10(-12) M), which is more sensitive than the existing report based on few-layer graphene. The graphene films obtained using conventional PMMA-assisted transfer technique exhibits PMMA residues, which degrade the sensing performance of graphene. We have demonstrated that the sensing performance of the graphene samples prepared by gold-transfer is largely enhanced (by 125%). (C) 2012 Elsevier B.V. All rights reserved.
三維積體電路
(2013-03-16)
陳冠能
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李世偉
一種三維積體電路,其包括一第一晶圓及一第二晶圓。第一晶圓包括一第一導電圖樣。第二晶圓包括一第二導電圖樣,且電性連接第一導電圖樣。其中第一晶圓與第二晶圓的位移量係根據第一導電圖樣及第二導電圖樣的電阻値來決定。
微藻養殖模組
(2013-03-16)
林志生
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邱聖壹
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高千雅
一種用於減碳與產製生物質之微藻養殖模組，包括第一光生物反應器組、第二光生物反應器組、氣體切換裝置以及控制單元。氣體切換裝置連通至第一光生物反應器組及第二光生物反應器組。控制單元耦接並控制氣體切換裝置，藉此在第一預定時間內，將廢氣通入第一光生物反應器組，並將一空氣通入第二光生物反應器組，之後在第二預定時間內，將廢氣通入第二光生物反應器組，並將空氣通入第一光生物反應器組。其中，第一光生物反應器組及第二光生物反應器組中包括微藻株。
跟著紅氣球去旅行
(2013-03-17)
張芮瑜
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Department of Communication and Technology
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傳播與科技學系
《紅氣球之旅》是一部由台灣導演侯孝賢執導的西方電影，透過東方人的視角，觀看巴黎一個尋常家庭的生活瑣事，劇中透過手偶的表演傳達東西文化融合，是一部溫馨又可愛的小品。
創業新能力　臺灣思佈局
(2013-03-17)
林妍君
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Department of Communication and Technology
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傳播與科技學系
中華青創總會對臺灣人民進行問卷調查，得出未來五大民眾看好的趨勢產業，以及創業者所需具備的五項要素。
幸福劇本　自己寫
(2013-03-17)
王紹容
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Department of Communication and Technology
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傳播與科技學系
〈My Cherie Amour〉是派特結婚時的主題曲，浪漫動人的旋律本該和美好的回憶相連，但在他親眼見到前妻偷情還放著這首歌時，他徹底崩潰，發狂似地把對方打到重傷，派特因此被判得進精神病院休養。
走出傳統　張莉娜
(2013-03-17)
龔霈鏵
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Department of Communication and Technology
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傳播與科技學系
「就是因為因緣際會看到那一張室內設計圖，我才知道自己想走的是這一條路。」張莉娜當時的家庭還是比較傳統，而一直要等到了大學之後，她才發現自己的路，不在傳統的道路上。
你們給的「原」本山滋味
(2013-03-17)
謝昌錡
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Department of Communication and Technology
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傳播與科技學系
如果人生還有一次機會，我會奮不顧身地再經歷這一切。在這裡要感謝的人太多了，就感謝座落在這裡的這幾座山吧！我愛你們，所以我會珍惜。
What are you wear today
(2013-03-17)
廖敏廷
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Department of Communication and Technology
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傳播與科技學系
翻開衣櫥，拿出屬於你的特色褲子，不僅時穿又展現性格。決定做自己，為自己的時尚裝扮。