Browsing by Issue Date, starting with "2016-06-09"

Now showing 1 - 20 of 17091

Label-free Chemical Imaging of Fungal Spore Walls by Raman Microscopy and Multivariate Curve Resolution Analysis
(2016-06-09)
Noothalapati, Hemanth
;
Sasaki, Takahiro
;
Kaino, Tomohiro
;
Kawamukai, Makoto
;
Ando, Masahiro
Fungal cell walls are medically important since they represent a drug target site for antifungal medication. So far there is no method to directly visualize structurally similar cell wall components such as alpha-glucan, beta-glucan and mannan with high specificity, especially in a label-free manner. In this study, we have developed a Raman spectroscopy based molecular imaging method and combined multivariate curve resolution analysis to enable detection and visualization of multiple polysaccharide components simultaneously at the single cell level. Our results show that vegetative cell and ascus walls are made up of both alpha- and beta-glucans while spore wall is exclusively made of alpha-glucan. Co-localization studies reveal the absence of mannans in ascus wall but are distributed primarily in spores. Such detailed picture is believed to further enhance our understanding of the dynamic spore wall architecture, eventually leading to advancements in drug discovery and development in the near future.
黃唯洲不忘初衷的第三代經營者
(國立交通大學客家文化學院, 2016-06-10)
陳冠維
「工作，千萬別忘了初衷！」這是黃唯洲每天提醒自己的話。
Junction-less poly-Ge FinFET and charge-trap NVM fabricated by laser-enabled low thermal budget processes
(2016-06-13)
Huang, Wen-Hsien
;
Shieh, Jia-Min
;
Shen, Chang-Hong
;
Huang, Tzu-En
;
Wang, Hsing-Hsiang
A doping-free poly-Ge film as channel material was implemented by CVD-deposited nano-crystalline Ge and visible-light laser crystallization, which behaves as a p-type semiconductor, exhibiting holes concentration of 1.8 x 10(18) cm(-3) and high crystallinity (Raman FWHM similar to 4.54 cm(-1)). The fabricated junctionless 7 nm-poly-Ge FinFET performs at an I-on/I-off ratio over 10(5) and drain-induced barrier lowering of 168mV/ V. Moreover, the fast programming speed of 100 mu s-1 ms and reliable retention can be obtained from the junctionless poly-Ge nonvolatile-memory. Such junctionless poly-Ge devices with low thermal budget are compatible with the conventional CMOS technology and are favorable for 3D sequential-layer integration and flexible electronics. Published by AIP Publishing.
Observation of reflection feedback induced the formation of bright-dark pulse pairs in an optically pumped semiconductor laser
(2016-06-13)
Tsou, C. H.
;
Liang, H. C.
;
Huang, K. F.
;
Chen, Y. F.
;
電子物理學系
It is experimentally demonstrated that the tiny reflection feedback can lead the optically pumped semiconductor laser (OPSL) to be operated in a self-mod-locked state with a pulse train of bright-dark pulse pairs. A theoretical model based on the multiple reflections in a phase-locked multi-longitudinal-mode laser is developed to confirm the formation of bright-dark pulse pairs. The present finding can offer an important insight into the temporal dynamics in mode-locked OPSLs. (C)2016 Optical Society of America
Photoelectrochemical degradation of dye wastewater on TiO2-coated titanium electrode prepared by electrophoretic deposition
(2016-06-13)
Liu, Ching-Fang
;
Huang, C. P.
;
Hu, Chi-Chang
;
Juang, Yaju
;
Huang, Chihpin
The degradation of azo dye Orange G (OG) on TiO2/Ti electrode was studied using a photoelectrocatalytic system. TiO2/Ti electrode was prepared by electrophoretic deposition (EPD) process. Results of surface analyses, namely, X-ray diffraction (XRD), SEM, X-ray photoelectron spectroscopy (XPS), and linear sweep voltammetry (LSV), revealed that the optimal EPD condition was a deposition potential of 180 V for 1 min and annealed at 350 degrees C. The TiO2/Ti electrode was used as photoanode and a graphite cathode for the degradation of OG. The coupling effect of photocatalytic and electrochemical oxidation processes was evaluated in terms of the decolorization of OG. The degradation of OG increased in the following increasing order: photocatalysis < electrochemical oxidation < photoelectrochemical degradation. A decolorization of 54.3% was achieved at an applied current density of 75 A cm(-2). The degradation of Orange G follows the first-order kinetics in those three treatment processes, which suggests the participation of OH radicals in the decolorization reaction. (C) 2016 Elsevier B.V. All rights reserved.
謝羽杰玩味陶瓷帶領品嘗客韻
(國立交通大學客家文化學院, 2016-06-14)
謝采妤
苗栗的陶瓷文化存在已久，然而卻逐漸沒落，謝羽杰抱持著初生之犢不畏虎的決心，踏上回鄉之路，一展藝術長才，為家鄉陶瓷產業添上新的色彩。
van der Waal Epitaxy of Flexible and Transparent VO2 Film on Muscovite
(2016-06-14)
Li, Chien-I
;
Lin, Jheng-Cyuan
;
Liu, Heng-Jui
;
Chu, Ming-Wen
;
Chen, Hsiao-Wen
Vanadium dioxide (VO2) is a compelling candidate for next-generation electronics beyond conventional silicon-based devices due to the exhibition of a sharp metal insulator transition. In this study, in order to realize functional VO2 film for flexible electronics, the growth of VO2 film directly on a transparent and flexible muscovite via van der Waals epitaxy is established. The heteroepitaxy and structural transition of VO2 films on muscovite are examined by a combination of high resolution X-ray diffraction, transmission electron microscopy, and Raman spectroscopy. The unique metal insulator transition of VO2 is further revealed with a change in electrical resistance over 10(3) and a more than 50% variation of optical transmittance. Furthermore, due to the nature of muscovite, the VO2/muscovite heterostructure possesses superior flexibility and optical transparence. The approach developed in this study paves an intriguing way to fabricate functional VO2 film for the applications in flexible electronics.
Selective killing of cancer cells by nanoparticle-assisted ultrasound
(2016-06-14)
Kosheleva, Olga K.
;
Lai, Tsung-Ching
;
Chen, Nelson G.
;
Hsiao, Michael
;
Chen, Chung-Hsuan
Background: Intense ultrasound, such as that used for tumor ablation, does not differentiate between cancerous and normal cells. A method combining ultrasound and biocompatible gold or magnetic nanoparticles (NPs) was developed under in vitro conditions using human breast and lung epithelial cells, which causes ultrasound to preferentially destroy cancerous cells. Results: Co-cultures of BEAS-2B normal lung cells and A549 cancerous lung cells labeled with green and red fluorescent proteins, respectively, were treated with focused ultrasound beams with the addition of gold and magnetic nanoparticles. There were significantly more necrotic A549 cells than BEAS-2 cells when gold nanoparticles were added to the culture medium [(50.6 +/- 15.1) vs. (7.4 +/- 2.9) %, respectively, P < 0.01]. This selective damage to cancer cells was also observed for MDA-MB231 breast cancer cells relative to MCF-10A normal breast cells after treatment with magnetic nanoparticles. Conclusions: The data obtained for different cell lines indicate that nanoparticle-assisted ultrasound therapy (NAUT) could be an effective new tool for cancer-specific treatment and could potentially be combined with conventional methods of cancer diagnosis and therapy to further increase the overall cancer cure rate.
Self-assembled tri-, tetra- and penta-ethylene glycols as easy, expedited and universal interfacial cathode-modifiers for inverted polymer solar cells
(2016-06-14)
Cao, Fong-Yi
;
Lai, Yu-Ying
;
Chen, Yung-Lung
;
Cheng, Yen-Ju
;
應用化學系
Non-conjugated triethylene glycol (3-EG), tetraethylene glycol (4-EG) and pentaethylene glycol (5-EG) are presented as new cathode modification materials to achieve high-performance inverted-PCSs. By spin-coating from a non-chlorinated solvent, these small molecules can self-assemble on ITO via surface coordination and hydrogen bonding to form an ultra-thin layer. Theoretical simulations reveal that the coordination of oxygen atoms in the EG molecules to indium moieties on the ITO surface is the major mechanism in inducing interfacial dipoles, thereby reducing the work function (W-F) of ITO for efficient electron collection. Based on the PBDTTT-EFT:PC71BM blend, the bulk heterojunction device using the 5-EG layer exhibited a higher short-circuit current density (J(sc)) of 15.27 mA cm(-2), fill factor (FF) of 0.69, and power conversion efficiency (PCE) of 8.46%, which are better than those of the corresponding devices using either inorganic ZnO or non-conjugated poly(ethylene oxide) (PEO) as the cathode buffer layer. More importantly, this simple and expedited strategy is also demonstrated to be universally applicable to various p-type conjugated polymers. The EG oligomers with well-defined chemical structures have the advantages of easy availability, simple processability and good device reproducibility, which are crucial keys for future commercialization using large-scale roll-to-roll production.
詹立堅生活的創造家
(國立交通大學客家文化學院, 2016-06-14)
洪若華
木頭的沉著穩重、一圈圈不規則的紋路、大自然特有的外貌及氣味，到了詹立堅的手中創造出絕無僅有的性格。家具，不就是每天在家跟自己相處的東西嗎？詹立堅的「小詹牌」木工產品追求的是：實用性為要，品質與美感兼備。而創造，正是他隨時在做的事情。
Enhanced electrical properties and field emission characteristics of AZO/ZnO-nanowire core-shell structures
(2016-06-14)
Huang, Jheng-Ming
;
Tsai, Shang-You
;
Ku, Ching-Shun
;
Lin, Chih-Ming
;
Chen, San-Yuan
The electrical properties and field-emission characteristics of ZnO nanowires (ZnO-NWs) fabricated using a vapor-liquid-solid method were systematically investigated. In particular, we explored the effects of Al-doped ZnO (AZO) films (thickness 4-100 nm) deposited on ZnO-NWs using an atomic layer deposition (ALD) method on the optoelectronic properties. The results show that the sheet resistance of net-like ZnO-NW structures can be significantly improved, specifically to become similar to 1/1000 of the sheet resistance of the as-grown ZnO-NWs, attaining less than 10 Omega Sq(-1). The emission current density measured at the maximum field was roughly quadrupled relative to that of the as-grown ZnO-NWs. The data of the enhanced field-emission characteristics show that, with the ALD system, the AZO films of small resistance are readily coated on a structure with a high aspect ratio and the coating radius is controlled relative to the turn-on voltage and current density. The ultrathin AZO film from a one-monolayer coating process also significantly improved emission properties through modification of the effective work function at the AZO/ZnO-NW surface.
戴銘億電機畢業回鄉種苗
(國立交通大學客家文化學院, 2016-06-14)
鄒嘉正
一個烏雲密佈的關西週五，一位農民揮汗壓著手中小小的幼苗，細心檢查着幼苗情況。每次下雨前後，戴銘億總會來到育苗場，檢查溫室的防災措施，那怕一場大雨也會毀掉他全部的心血，他對幼苗無微不至的呵護，使幼苗能夠茁壯成長。
彭國岳點亮創業夢守護小農心田
(國立交通大學客家文化學院, 2016-06-14)
廖婕宏
甫走入創業這行時，有人問起：「你創業是玩真的還是好玩？」彭國岳爽朗的說：「當然是好玩啊！當作是線上遊戲，才有熱情一直玩下去。」
60-GHz Millimeter-wave Over Fiber with Directly Modulated Dual-mode Laser Diode
(2016-06-14)
Tsai, Cheng-Ting
;
Lin, Chi-Hsiang
;
Lin, Chun-Ting
;
Chi, Yu-Chieh
;
Lin, Gong-Ru
A directly modulated dual-mode laser diode (DMLD) with third-order intermodulation distortion (IMD3) suppression is proposed for a 60-GHz millimeter-wave over fiber (MMWoF) architecture, enabling new fiber-wireless communication access to cover 4-km single-mode-fiber (SMF) and 3-m wireless 16-QAM OFDM transmissions. By dual-mode injection-locking, the throughput degradation of the DMLD is mitigated with saturation effect to reduce its threshold, IMD3 power and relative intensity noise to 7.7 mA, -85 dBm and -110.4 dBc/Hz, respectively, providing huge spurious-free dynamic range of 85.8 dB/Hz(2/3). This operation suppresses the noise floor of the DMLD carried QPSK-OFDM spectrum by 5 dB. The optical receiving power is optimized to restrict the power fading effect for improving the bit error rate to 1.9 x 10(-3) and the receiving power penalty to 1.1 dB. Such DMLD based hybrid architecture for 60-GHz MMW fiber-wireless access can directly cover the current optical and wireless networks for next-generation indoor and short-reach mobile communications.
古侑盛琉戀客家竹東子弟創立工作室
(國立交通大學客家文化學院, 2016-06-14)
黃譓安
看著窗外的風景呼嘯而過，午後的新竹客運紡錘梭似的沿著光復路劃開寧靜的街頭。在新竹竹東五豐街口下車後，不確定地拐進幾個尋常人家的巷口，舊式灰矮平房夾道相迎，鋪著柏油的地毯指向的目的地是這片單一景色裡的一抹繽紛──「琉戀璃品手創工坊」招牌。
張景禹築夢踏實的馬戲團人生
(國立交通大學客家文化學院, 2016-06-14)
黃若涵
2016年5月19日，天氣晴朗、氣溫偏高，一走進窄窄的新竹市文昌街，各式各樣的招牌林立，在這之中有一個小小的正方形招牌上面寫著DRAWOHS----幾個瘦瘦的黑字，很有個性地嵌在白色的背景裡，雖然不是最顯眼的，但富有設計感的招牌讓人看了一眼就忘不了。
羅有助無毒友善養好蛋
(國立交通大學客家文化學院, 2016-06-14)
黃靖雅
從貼著「防疫期間，請勿進入」的大門望進去，一片讓人放鬆的翠綠長草，坐落這之間，矗立著的塔狀物，存放著要給雞隻吃的大豆，而五棟雞寮，就是蛋雞們的家。位在新竹縣竹東鎮陸豐里的「有助牧場」，是台灣少數堅持無毒養殖、以全場放牧為經營型態的養蛋人家。
Development of method for quantifying essential tremor using a small optical device
(2016-06-15)
Chen, Kai-Hsiang
;
Lin, Po-Chieh
;
Chen, Yu-Jung
;
Yang, Bing-Shiang
;
Lin, Chin-Hsien
Background: Clinical assessment scales are the most common means used by physicians to assess tremor severity. Some scientific tools that may be able to replace these scales to objectively assess the severity, such as accelerometers, digital tablets, electromyography (EMG) measurement devices, and motion capture cameras, are currently available. However, most of the operational modes of these tools are relatively complex or are only able to capture part of the clinical information; furthermore, using these tools is sometimes time consuming. Currently, there is no tool available for automatically quantifying tremor severity in clinical environments. New method: We aimed to develop a rapid, objective, and quantitative system for measuring the severity of finger tremor using a small portable optical device (Leap Motion). Results: A single test took 15 s to conduct, and three algorithms were proposed to quantify the severity of finger tremor. The system was tested with four patients diagnosed with essential tremor. Comparison with existing method: The proposed algorithms were able to quantify different characteristics of tremor in clinical environments, and could be used as references for future clinical assessments. Conclusions: A portable, easy-to-use, small -sized, and noncontact device (Leap Motion) was used to clinically detect and record finger movement, and three algorithms were proposed to describe tremor amplitudes. (C) 2016 Elsevier B.V. All rights reserved.
許嵐婷的沃野千里永續食農教育
(國立交通大學客家文化學院, 2016-06-15)
許心如
隨著科技發展，人們取得食物的途徑越來越方便，消費者的選擇越趨多樣化，在超商就可以看見來自異國的水果，食品加工的技術複雜，食物被改造成各種形式融入日常。
Single-Mode 850-nm VCSELs for 54-Gb/s ON-OFF Keying Transmission Over 1-km Multi-Mode Fiber
(2016-06-15)
Chi, Kai-Lun
;
Shi, Yi-Xuan
;
Chen, Xin-Nan
;
Chen, Jason (Jyehong)
;
Yang, Ying-Jay
By combing Zn-diffusion and oxide-relief apertures with strong detuning (>20 nm) in our demonstrated short-cavity (lambda/2) 850-nm vertical-cavity surface-emitting lasers (VCSELs), wide electrical-to-optical bandwidth (29-24 GHz), low-differential resistance (similar to 100 Omega), and (quasi) single-mode (SM) with reasonable output power (similar to 1.4 mW) performances can be simultaneously achieved. Error-free ON-OFF keying transmission at 54-Gb/s data rate through 1-km OM4 multi-mode fiber can be achieved by using highly SM device with forward error correction and decision feedback equalization techniques. As compared with the reference device with a larger oxide-relief aperture and a multi-mode performance, the SM device exhibits lower bit-error rate (1x10(-5) versus 1x10(-2)) at 54 Gb/s. This result indicates that modal dispersion plays more important role in transmission than that of output power does. We benchmark these results to an industrial 50-Gb/s SM VCSEL. It shows a higher bit-error-rate value similar to 3.5x10(-3) versus similar to 1.4x10(-4) under the same received optical power.