Browsing by Issue Date, starting with "2016-10-18"

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WO3 Nanoparticles or Nanorods Incorporating Cs2CO3/PCBM Buffer Bilayer as Carriers Transporting Materials for Perovskite Solar Cells
(2016-10-18)
Chen, Chih-Ming
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Lin, Zheng-Kun
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Huang, Wei-Jie
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Yang, Sheng-Hsiung
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照明與能源光電研究所
In this work, we demonstrate a novel carrier transporting combination made of tungsten trioxide (WO3) nanomaterials and Cs2CO3/PCBM buffer bilayer for the fabrication of perovskite solar cells (PSCs). Two different types of WO3, including nanoparticles and nanorods, were prepared by sol-gel process and hydrothermal method, respectively. Cs2CO3/PCBM buffer bilayer was inserted between WO3 and perovskite layers to improve charge transfer efficiency and formation of pinhole-free perovskite layer. Besides, the leakage current of the devices containing Cs2CO3/PCBM buffer bilayer was significantly suppressed. The optimized device based on WO3 nanoparticles and Cs2CO3/PCBM bilayer showed an open-circuit voltage of 0.84 V, a short-circuit current density of 20.40 mA/cm(2), a fill factor of 0.61, and a power conversion efficiency of 10.49 %, which were significantly higher than those of PSCs without Cs2CO3/PCBM buffer bilayer. The results revealed that the combination of WO3 nanomaterials and Cs2CO3/PCBM bilayer provides an effective solution for improving performances of PSCs.
Plant Cell Wall-Penetrable, Redox-Responsive Silica Nanoprobe for the Imaging of Starvation-Induced Vesicle Trafficking
(2016-10-18)
Huang, Xin-Chun
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Inoue-Aono, Yuko
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Moriyasu, Yuji
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Hsieh, Pei-Ying
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Tu, Wei-Ming
Autophagy is a self-protection process against reactive oxygen species (ROS). The intracellular level of ROS increased when cells were cultured under nutrient starvation. Antioxidants such as glutathione and ascorbic acid play an important role in ROS removal. However, the cellular redox state In the autophagic pathway is still unclear. Herein, we developed a new redox-sensitive probe with a disulfide-linked silica scaffold to enable the sensing of the reduction environment in cell organelles. This redox-responsive silica nanoprobe (ReSiN) could penetrate the plant cell wall and release fluorescent molecules in; response to redox states. By applying the ReSiN to tobacco BY-2 cells and tracing the distribution of fluorescence, we found a higher reducing potential in. the central vacuole than in the autolysosomes. Upon cysteine protease inhibitor (E64-c) treatment in sucrose free medium, the disulfide-silica structures. of the ReSiNs were broken down in the vacuoles but Were not degraded and were accumulated in the autolysosomes. These results reveal the feasibility of our nanoprobe for monitoring the endocytic and Macroautophagic pathways. These pathways merge upstream of the-central vacuole, which is the final destination of both pathways. In addition, different redox potentials were observed in the autophagic pathway. Finally, the expression of the autophagy-related protein (Atg8) fused with green fluorescence protein confirmed that the ReSiN treatment itself did not induce the autophagic pathway under normal physiological conditions, indicating the versatility of this nanoprobe in studying stimuli triggered autophagy-related trafficking.
交大e-News第219期-校長講座：趙小蘭女士分享父親趙錫成博士豐富的人生故事
(2016-10-20)
國立交通大學秘書室
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Secretariat
Hierarchical Fe2O3 nanotube/nickel foam electrodes for electrochemical energy storage
(2016-10-20)
Lin, Yan-Gu
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Hsu, Yu-Kuei
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Lin, Yu-Chang
;
Chen, Ying-Chu
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材料科學與工程學系
An iron-oxide (Fe2O3) nanotube (NT) array is grown directly as a hierarchical nanoarchitecture on a nickel-foam (NF) surface via a simple and cost-effective immersive process. The morphology and microstructure of Fe2O3 NT arrays are systematically examined by scanning electron, transmission electron, Raman, and X-ray photoelectron spectroscopies. The results reveal that the walls of Fe2O3 NT are composed mainly of agglomerated small alpha-Fe2O3 (hematite) monocrystalline nanoparticles filled with a few ZnO monocrystalline particles. The microstructural influence on the pseudocapacitive performance of the obtained Fe2O3 NT/NF electrodes is also investigated via in-situ X-ray absorption spectroscopy (XAS) and electrochemical measurement. The in-situ XAS results regarding charge storage mechanisms of the Fe2O3 NT/NF electrodes show that a Li+ can reversibly insert/desert into/from the 3D mesoporous textures between the Fe2O3 subunits depending on the applied potential. The electrochemical results indicate that the Fe2O3 NT/NF electrode shows highly reversible features and satisfactory rate abilities. Most significantly, the excellent specific capacitance achieved in Fe2O3 NT/NF nanoelectrodes is as great as 300.1 Fg(-1); energy density 75 W h kg(-1) and power density 4.5 kW kg(-1) are obtained, and the Fe2O3 NT/NF nanoelectrode has acceptable cycling stability after 3000 cycles. (C) 2016 Elsevier Ltd. All rights reserved.
Hierarchical Fe2O3 nanotube/nickel foam electrodes for electrochemical energy storage
(2016-10-20)
Lin, Yan-Gu
;
Hsu, Yu-Kuei
;
Lin, Yu-Chang
;
Chen, Ying-Chu
;
材料科學與工程學系
An iron-oxide (Fe2O3) nanotube (NT) array is grown directly as a hierarchical nanoarchitecture on a nickel-foam (NF) surface via a simple and cost-effective immersive process. The morphology and microstructure of Fe2O3 NT arrays are systematically examined by scanning electron, transmission electron, Raman, and X-ray photoelectron spectroscopies. The results reveal that the walls of Fe2O3 NT are composed mainly of agglomerated small alpha-Fe2O3 (hematite) monocrystalline nanoparticles filled with a few ZnO monocrystalline particles. The microstructural influence on the pseudocapacitive performance of the obtained Fe2O3 NT/NF electrodes is also investigated via in-situ X-ray absorption spectroscopy (XAS) and electrochemical measurement. The in-situ XAS results regarding charge storage mechanisms of the Fe2O3 NT/NF electrodes show that a Li+ can reversibly insert/desert into/from the 3D mesoporous textures between the Fe2O3 subunits depending on the applied potential. The electrochemical results indicate that the Fe2O3 NT/NF electrode shows highly reversible features and satisfactory rate abilities. Most significantly, the excellent specific capacitance achieved in Fe2O3 NT/NF nanoelectrodes is as great as 300.1 Fg(-1); energy density 75 W h kg(-1) and power density 4.5 kW kg(-1) are obtained, and the Fe2O3 NT/NF nanoelectrode has acceptable cycling stability after 3000 cycles. (C) 2016 Elsevier Ltd. All rights reserved.
Infrared spectral identification of the Criegee intermediate (CH3)(2)COO
(2016-10-21)
Wang, Yi-Ying
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Chung, Chao-Yu
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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
Criegee intermediates are carbonyl oxides that play critical roles in the ozonolysis of alkenes in the atmosphere. So far, the infrared spectra of only the simplest Criegee intermediates CH2OO and CH3CHOO are reported. We report the transient infrared spectrum of the next member (CH3)(2)COO, produced from ultraviolet irradiation of a mixture of (CH3)(2)CI2 + O-2 in a flow reactor and detected with a step-scan Fourier-transform spectrometer. The four observed bands near 1424, 1368, 1040, and 887.4 cm(-1) provide definitive identification of (CH3)(2)COO. The observed vibrational wavenumbers and rotational contours agree with those predicted with quantum-chemical calculations; contributions of the hot bands from excited states of the low-lying torsional modes are significant. The rapid decay yields an estimate of the rate coefficient similar to 1.6 x 10(-10) cm(3) molecule(-1) s(-1) for the self-reaction of (CH3)(2)COO. The direct IR detection of (CH3)(2)COO should prove useful for field measurements and laboratory investigations of related Criegee mechanism. Published by AIP Publishing.
Nanometer scale fabrication and optical response of InGaN/GaN quantum disks
(2016-10-21)
Lai, Yi-Chun
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Higo, Akio
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Kiba, Takayuki
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Thomas, Cedric
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Chen, Shula
In this work, we demonstrate homogeneously distributed In0.3Ga0.7N/GaN quantum disks (QDs), with an average diameter below 10 nm and a high density of 2.1 x 10(11) cm(-2), embedded in 20 nm tall nanopillars. The scalable top-down fabrication process involves the use of self-assembled ferritin bio-templates as the etch mask, spin coated on top of a strained In0.3Ga0.7N/GaN single quantum well (SQW) structure, followed by a neutral beam etch (NBE) method. The small dimensions of the iron cores inside ferritin and nearly damage-free process enabled by the NBE jointly contribute to the observation of photoluminescence (PL) from strain-relaxed In0.3Ga0.7N/GaN QDs at 6 K. The large blueshift of the peak wavelength by over 70 nm manifests a strong reduction of the quantum-confined Stark effect (QCSE) within the QD structure, which also agrees well with the theoretical prediction using a 3D Schrodinger equation solver. The current results hence pave the way towards the realization of large-scale III-N quantum structures using the combination of bio-templates and NBE, which is vital for the development of next-generation lighting and communication devices.
療傷手冊　陳雪的戀愛哲學
(2016-10-23)
洪于婷
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Department of Communication and Technology
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傳播與科技學系
由「我們都是千瘡百孔的戀人」一書，簡單認識同志作家陳雪和她的愛情觀。
活力公益　甘苦生活節
(2016-10-23)
何肇耕
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何家沂
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Department of Communication and Technology
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傳播與科技學系
家扶基金會舉辦公益活動，翻轉清貧大家一起來！
偽裝者赤膽忠心為復國
(2016-10-23)
張芳語
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Department of Communication and Technology
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傳播與科技學系
偽裝者們，為抗日而不惜背叛家人和朋友，為了中國的未來而犧牲前途的三兄弟，交織出一部經典抗日劇。
製造意外　發現生命價值
(2016-10-23)
郭宜婷
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Department of Communication and Technology
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傳播與科技學系
剛跟死神簽下契約就碰上愛情的黑色喜劇「意外製造公司」，以輕鬆愉悅的劇情探討嚴肅生死議題。
變裝遊行　重現大稻埕風華
(2016-10-23)
曾婕茵
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沈慶柔
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Department of Communication and Technology
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傳播與科技學系
大稻埕藝術節自十月一日開始為期一個月的精彩活動，並透過1920變裝遊行等創意方式，讓民眾更重視藝術與文化。
名為害怕的勇氣
(2016-10-23)
張芸瑄
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Department of Communication and Technology
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傳播與科技學系
害怕分離，何不擁抱內心的恐懼，勇敢向前。
女性影展　北中雙城聯映
(2016-10-23)
朱倫君
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鄧涵文
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Department of Communication and Technology
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傳播與科技學系
第一屆臺中國際女性影展於10月20日盛大開幕。影展為期四天，精選23部電影，並舉辦多場論壇，提供影迷與影人相互交流的平臺。
最陌生的親密
(2016-10-23)
王韋翔
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Department of Communication and Technology
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傳播與科技學系
一些自己和母親在相處上的的轉變，對於母子關係的茫然。
高端科技　展場爭豔
(2016-10-23)
黃佳俐
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Department of Communication and Technology
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傳播與科技學系
介紹日本高端電子資訊科技綜合展（CEATEC Japan）與當今科技發展趨勢並反思科技造成的問題。
總編輯的話
(2016-10-23)
陳昶安
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Department of Communication and Technology
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傳播與科技學系
喀報第兩百四十九期，共十九篇稿件，以影音新聞為主，帶給讀者豐富的活動資訊。
台北溫泉季　北投智慧旅遊
(2016-10-23)
王廷瑄
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Department of Communication and Technology
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傳播與科技學系
2016台北溫泉季在北投！除了推出許多溫泉優惠，今年也結合科技APP，希望打造北投智慧旅遊。
夜貓族　越夜越美麗
(2016-10-23)
林宥成
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Department of Communication and Technology
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傳播與科技學系
用不同觀點探討夜貓族的生活。
手繪電影看板　復古再創新
(2016-10-23)
邱琨皓
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凃湘羚
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Department of Communication and Technology
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傳播與科技學系
「全美戲院手繪看板研習營」於10/18-10/21在戲院對面開設密集班，吸引對畫畫有興趣的民眾報名。