Browsing by Issue Date, starting with "2019-06-07"

Now showing 1 - 20 of 7403

Communication-Potential of the pi-Gate InAs HEMTs for High-Speed and Low-Power Logic Applications
(2019-06-07)
Yao, Jing-Neng
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Lin, Yueh-Chin
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Wong, Ying-Chieh
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Huang, Ting-Jui
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Hsu, Heng-Tung
Composite channel (In0.65Ga0.35As/InAs/In0.65Ga0.35As) high electron mobility transistors (HEMTs) with pi-gate structure were investigated for high-speed and low-power logic applications. The conventional and tri-gate MESA HEMTs were compared with the pi-gate device for evaluation. The pi-gate device exhibited the best maximum transconductance value of 1584 mS/mm, on-state current of 332mA/mm, subthreshold swing (SS) of 78.1 mV/decade, and I-ON/I-OFF ratio of 3 x 10(4) at V-DS = 0.5 V at room temperature. These results indicated that the designed pi-gate InAs devices improve the electrical characteristics of InAs HEMTs for high-speed and low-power logic applications. (c) 2019 The Electrochemical Society.
A 0.05 V driven ammonia gas sensor based on an organic diode with a top porous layered electrode and an air-stable sensing film
(2019-06-07)
Madhaiyan, Govindasamy
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Chen, Chao-Hsuan
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Wu, Yi-Chu
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Horng, Sheng-Fu
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Zan, Hsiao-Wen
In this work, we successfully demonstrated an extremely-low-voltage (0.05 V) gas sensor based on a vertical organic diode with work-function-matched electrodes. With the designed electrodes (MoO3/Al vs. Al), the built-in field in the vertical diode is greatly reduced and hence the diode can be turned on at a very low voltage. By producing nanometer pores in the top electrode, the diode becomes a very sensitive gas sensor to detect ammonia in parts-per-billion (ppb) concentrations. Upon reducing the voltage from 5 V to 0.05 V, this sensor device shows an over 5-times enhancement in the sensitivity. The air-stable sensing film also exhibits a lifetime of 30 days in air. Finally, by connecting with an organic photovoltaic (OPV) device, the gas sensor can be directly powered and switched on by irradiating light on the OPV.
Conductive films based on sandwich structures of carbon nanotubes/silver nanowires for stretchable interconnects
(2019-06-07)
Jheng, Li-Cheng
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Hsiao, Chi-Hui
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Ko, Wen-Ching
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Hsu, Steve Lien-Chung
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Huang, Yu-Lun
A variety of conductive films made of a hybrid of two conductive nanomaterials have been used as stretchable electrodes or interconnectors, desirable for stretchable electronic devices. Their intrinsic stretchability of electrical conductivity allows for accommodating mechanical strain to a certain extent under various deformations. However, few efforts have been made to enhance the interactions between two conductive components in a hybrid system. Herein, we reported new conductive films with tri-layer sandwich structures based on carbon nanotubes (CNTs) and Ag nanowires (NWs), encapsulated in silicone rubber, exhibited high stretchability along with insignificant piezoresistivity. They are suitable to be stretchable interconnectors. A successive vacuum filtration method was used to stack the conductive components layer by layer. The effects of the stacking sequence and the interactions between layers on the stretchability and stability of the electrical properties under mechanical deformations were studied. In the case of a tri-layer conductive film comprising two CNT outer layers and one AgNW central layer in the presence of enhanced interfacial interactions, it showed exceptionally durability in withstanding repetitive deformations.
An indoor light-activated 3D cone-shaped MoS2 bilayer-based NO gas sensor with PPb-level detection at room-temperature
(2019-06-07)
Chen, Yu-Ze
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Wang, Sheng-Wen
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Yang, Chun-Chuan
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Chung, Chieh-Han
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Wang, Yi-Chung
Utilization of light to boost the performance of gas sensors allows us to operate sensor devices at room temperature. Here, we, for the first time, demonstrated an indoor light-activated 3D cone-shaped MoS2 bilayer-based NO gas sensor with ppb-level detection operated at room-temperature. Large-area coneshaped (CS)-MoS2 bilayers were grown by depositing 2 nm-thick MoO3 layers on a 2'' three-dimensional (3D) cone-patterned sapphire substrate (CPSS) followed by a sulfurization process via chemical vapor deposition. Because the exposed area of MoS2 bilayers is increased by 30%, the CS-MoS2 gas sensor (GS) demonstrated excellent performance with a response of 470% and a fast response time of 25 s after exposure to 1 ppm of NO gas illuminated by ultraviolet (UV) light with a wavelength of 365 nm. Such extraordinary performance at room temperature is attributed to the enhanced light absorption because of the light scattering effect caused by the 3D configuration and photo-desorption induced by UV illumination. For NO concentrations ranging from 2 ppm down to 0.06 ppm, the CS-MoS2 GS demonstrated a stable sensing behavior with a high response and fast response time (470% and 25 s at 2 ppm NO) because of the light absorption enhanced by the 3D structure and photo-desorption under constant UV illumination. The CS-MoS2 GS exhibits a high sensitivity (189.2 R% ppm-1), allowing the detection of NO gas at 0.06 ppm in 130 s. In addition, the 3D cone-shaped structure prolonged the presence of sulfur vapor around MoO3, allowing MoO3 to react with sulfur completely. Furthermore, the CS-MoS2 GS using an indoor lighting to detect NO gas at room temperature was demonstrated for the first time where the CS-MoS2 GS exhibits a stable cycling behavior with a high response (165% at 1 ppm NO) in 50 s; for concentration as low as 0.06 ppm, the response of 75% in 150 s can be achieved.
In situ TEM observation of Au-Cu2O core-shell growth in liquids
(2019-06-07)
Chen, Fu-Chun
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Chen, Jui-Yuan
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Lin, Ya-Hsuan
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Kuo, Ming-Yu
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Hsu, Yung-Jung
Heterogeneous nanoparticles are widely used in catalysis, sensors and biology due to their versatile functions. Among the various heterogeneous nanoparticles, Au-Cu2O core-shell nanoparticles show high stability and short response times for use as sensors and catalysts and have thus attracted much attention. Previous studies show that the properties of Au-Cu2O are mainly related to the shape and size of the Au-Cu2O nanoparticles. However, the forming behavior of heterostructures and the mechanism have not been fully explored. In this work, liquid cell transmission electron microscopy (LCTEM) was used to investigate the formation of these interesting Au-Cu2O nanoparticles and their process of aggregation. The electron beam and dispersion of gold nanoparticles are both important parameters for the reduction reaction in in situ LCTEM. The Au-Cu2O core-shell nanoparticles can be synthesized to have two morphologies, multifaceted and cubic. The nanoparticles grew into these different morphologies due to the amount of remaining citrate ligands on the surface of the gold nanoparticles. For the multifaceted nanoparticles, the epitaxy of the two components is confirmed from high-resolution TEM images and electron diffraction patterns with an epitaxial relationship of Au (020)//Cu2O (020) and Au [101]//Cu2O [101]. The growth rate is approximately 210 nm(2) s-1. On the other hand, the cubic nanoparticles nucleate and grow independently. The growth kinetics and elemental distributions have been systematically studied. In addition, the nanoclusters would float, rotate, and finally aggregate with the surrounding clusters. This in situ experiment sheds light on the growth mechanisms of nanostructures and will improve the applicability and controllability of heterostructure synthesis.
極簡生活頻道　末羊子
(2019-06-09)
林芷懷
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Department of Communication and Technology
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傳播與科技學系
【極簡生活修練題】專題

「哈囉大家好，我是末羊。」末羊子藉由經營YouTube頻道，與觀眾分享自己極簡生活態度。
變身真韓妞　韓國美妝YouTuber點點名　
(2019-06-09)
許可晴
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Department of Communication and Technology
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傳播與科技學系
【從衣到妝　韓式時尚滲透全台】

想知道韓國最近的美妝消息嗎？想像韓妞一樣擁有精緻的妝容嗎？讓我們一起來認識這幾位韓國美妝YouTuber吧！
產運？育成？交清產學中心比一比
(2019-06-09)
郭玟妤
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Department of Communication and Technology
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傳播與科技學系
有想法、有技術，創業卻不知道要找誰幫忙嗎？交清學生看過來，學校就是你的後盾！
前往坦尚尼亞　帶上台灣的愛吧
(2019-06-09)
呂奕廷
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程安瑜
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Department of Communication and Technology
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傳播與科技學系
國立清華大學坦尚尼亞志工團每年於非洲坦尚尼亞進行志工服務，提供當地學童教育資源與文化交流，今年他們將再度前往，把來自台灣的愛送往世界！
台灣空拍機先驅－李志清
(2019-06-09)
程安瑜
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Department of Communication and Technology
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傳播與科技學系
李志清致力研發無人機的技術、發展無人機的應用，並推廣無人機的教育，打造台灣無人機產業的新可能。
在地茶飲角礫　喀人Follow Me
(2019-06-09)
李庭安
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Department of Communication and Technology
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傳播與科技學系
【新一代　在地創生大使命】專題

「角礫」是位於中壢的一家在地飲食咖啡廳，結合藝文空間和飲食空間，並和在地老店合作，購買原料製作茶點，其中意義不單是餐飲，更多是記錄舊時的風光與回憶。
東京女子的尋寶圖鑑
(2019-06-09)
郭玟妤
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Department of Communication and Technology
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傳播與科技學系
【日本影劇為何深？】專題

日劇如同現實生活的一面鏡，也許如實映照、或者潤飾扭曲社會的真實面貌。身在東京的女子，寶物圖鑑記載了什麼收藏，又想把什麼納入囊中？透過圖表攤開「東京女子圖鑑」的東京地圖，挖掘隱藏劇中的資本主義思維。
來老屋吃
(2019-06-09)
吳佳璘
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Department of Communication and Technology
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傳播與科技學系
越來越多老屋改造成餐廳或咖啡店啦！一日吃VLOG帶你去老屋控必訪的三家人氣
也有這麼一天
(2019-06-09)
魏玓
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Department of Communication and Technology
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傳播與科技學系
318期《喀報》是本屆整合數位媒體實作同學（09級）的最後一期出刊。
採訪陶藝師之旅
(2019-06-09)
許家芸
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Department of Communication and Technology
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傳播與科技學系
【大家一起來找茶！】專題

喝茶總會需要用到器皿，而這些器皿是怎麼生成的呢？就讓我們來一探究竟吧！
打打打綠能科技　節能好幫手
(2019-06-09)
彭姿敏
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殷顗霖
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Department of Communication and Technology
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傳播與科技學系
打打打綠能科技推出智能雲能源管理系統，利用雲端的方式監測用電，並將用電數據化、視覺化，讓使用者能夠隨時掌握用電。
挑戰！一日學成小提琴
(2019-06-09)
彭姿敏
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Department of Communication and Technology
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傳播與科技學系
【解密小提琴】專題

從來沒有碰過小提琴的人也能在一夕之間學成，並拉奏簡單的樂曲嗎？讓我們看看會發生什麼事吧！
Flexible light valves using polymer-dispersed liquid crystals and TiO2/Ag/TiO2 multilayers
(2019-06-10)
Chiou, Chung Chin
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Hsu, Fan Hsi
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Petrov, Stefan
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Marinova, Vera
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Dikov, Hristosko
The era of flexible optoelectronics demands development of wearable and bendable structures, foldable touch screens, paper-like displays, and curved and flexible solid-state lighting devices. Here, we demonstrate the fabrication of highly flexible light valves using polymer-dispersed liquid crystal (PDLC) and TiO2/Ag/TiO2 transparent conductive films. TiO2/Ag/TiO2 multilayers were prepared by magnetron sputtering technique on polyethylene terephthalate (PET) substrates at room temperature. By keeping the equivalent TiO2 layers and varying the deposition time of the Ag layer, proper metal nanograins on TiO2 planar plane were formed, providing the best tradeoff between the transmittance, sheet resistance and bending ability. The results are validated by numerical simulations that suggest the best match between the deposition time and individual layer thickness. Based on the performed characteristics of TiO2/Ag/TiO2/PET structures, several flexible light valves are fabricated and characterized. The sheet resistance values of TiO2/Ag/TiO2/PET remain unchanged over 1000 bending cycles. The measured driving voltage and response time values open great potential of TiO2/Ag/TiO2/PET for integration into next-generation ITO-free flexible and stretchable devices. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
Protein-protein interaction prediction using a hybrid feature representation and a stacked generalization scheme
(2019-06-10)
Chen, Kuan-Hsi
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Wang, Tsai-Feng
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Hu, Yuh-Jyh
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交大名義發表
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分子醫學與生物工程研究所
BackgroundAlthough various machine learning-based predictors have been developed for estimating protein-protein interactions, their performances vary with dataset and species, and are affected by two primary aspects: choice of learning algorithm, and the representation of protein pairs. To improve the performance of predicting protein-protein interactions, we exploit the synergy of multiple learning algorithms, and utilize the expressiveness of different protein-pair features.ResultsWe developed a stacked generalization scheme that integrates five learning algorithms. We also designed three types of protein-pair features based on the physicochemical properties of amino acids, gene ontology annotations, and interaction network topologies. When tested on 19 published datasets collected from eight species, the proposed approach achieved a significantly higher or comparable overall performance, compared with seven competitive predictors.ConclusionWe introduced an ensemble learning approach for PPI prediction that integrated multiple learning algorithms and different protein-pair representations. The extensive comparisons with other state-of-the-art prediction tools demonstrated the feasibility and superiority of the proposed method.
Memristor effect in GeO[SiO2] and GeO[SiO] solid alloys films
(2019-06-10)
Volodin, V. A.
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Kamaev, G. N.
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Gritsenko, V. A.
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Gismatulin, A. A.
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Chin, A.
The p-Si(or n-Si)/GeO[SiO2] (or GeO[SiO])/indium-tin-oxide (ITO) structures were fabricated by simultaneous evaporation of GeO2 and SiO2 (or SiO) powders in high vacuum and further deposition of ITO contacts using the magnetron sputtering technique. The structural properties of the GeO[SiO2] and GeO[SiO] films were studied using FTIR and Raman spectroscopy. According to Raman data, the GeO[SiO] films deposited at a temperature of 100 degrees C contain amorphous Ge clusters. Their current-voltage characteristics were measured in the air atmosphere, and resistive switching (memristor effect) was observed in structures without a preliminary forming procedure. The Shklovskii-Efros percolation model gives a consistent explanation for the charge transport in the high-resistive state and the low-resistive state of memristors based on GeO[SiO2] or GeO[SiO] films.