Browsing by Issue Date, starting with "2018-03-21"

Now showing 1 - 20 of 11114

The Influence of Annealing Temperature on Amorphous Indium-Zinc-Tungsten Oxide Thin-Film Transistors
(2018-03-21)
Fu, Ruofan
;
Yang, Jianwen
;
Chang, Wei-Chiao
;
Chang, Wei-Cheng
;
Chang, Chien-Min
In this paper, the influence of annealing temperature on amorphous indium-zinc-tungsten-oxide (a-IZWO) thin-film transistors (TFTs) is investigated. As the annealing temperature increases, the IZWO films maintain an amorphous state, which is conducive to the uniformity of the TFT. The field effect mobility of the device increases as a function of annealing temperature and reaches 16.2cm(2)V(-1)s(-1) at 300 degrees C, along with an on/off current ratio of 1.6x10(8). Meanwhile, the corresponding positive bias stability is improved, as confirmed by the fact that the threshold voltage shift value reduces to 0.4V after being stressed for 1500s. This result can be ascribed to the decrease in electrons captured by the deep defects in a-IZWO TFTs.
The role of aromatic side chains on the supramolecular hydrogelation of naphthalimide/dipeptide conjugates
(2018-03-21)
Hsu, Shu-Min
;
Chakravarthy, Rajan Deepan
;
Cheng, Hsun
;
Wu, Fang-Yi
;
Lai, Tsung-Sheng
Herein, the influence of an amino acid side chain on the structural and functional properties of hydrogels has been described. In this study, four new hydrogelators based on the conjugates of dipeptides and naphthalimide (NI) have been designed, synthesized, and examined. Homopeptide 1 (NI-FF) of the phenylalanine residue forms a weak hydrogel or a viscous solution of worm-like micelles under basic conditions. On the other hand, dipeptide conjugates of 2 (NI-FY), 3 (NI-YF), and 4 (NI-YY), containing additional hydroxyl groups as tyrosine residues, can self-assemble into supramolecular hydrogels under physiological pH conditions. UV-vis, IR, and rheological studies clearly indicate the formation and stability of these dipeptide hydrogels. The TEM results revealed that the hydrogels (1-4) self-assembled into a nanofibrous morphology. Furthermore, the cell culture results show that NI-YF has better cell compatibility as compared to NI-FY and NI-YY and thus shows potential to be used as a hydrogel biomaterial. Overall, this study highlights the importance of the structure-hydrogelation relationship and provides new insights into the design of self-assembled peptide amphiphiles.
Inhomogeneous Photoluminescence Characteristic in Carbon Nanodots and Electrophotoluminescence Measurements
(2018-03-22)
Hamada, Morihiko
;
Okoshi, Kenji
;
Rana, Shailesh
;
Awasthi, Kamlesh
;
Iimori, Toshifumi
Photoluminescence (PL) spectra, time-resolved PL spectra, and PL decay profiles have been observed for carbon nanodots (CDs) with different excitation wavelengths in an embedded solid film and in solution. PL excitation spectra have been also observed with different monitoring wavelengths. Then, it is found in both solid film and solution that not only the location of the PL spectra but also the peak of the excitation spectra show a significant red shift, as the excitation and monitoring wavelengths become longer, respectively, indicating that the emitting states of the excitation-dependent PL are the real state to which direct absorption occurs from the ground state, not the transient trapped states produced by photoexcitation. It is shown that not only the excitation-dependent PL but also the excitation-independent PL with a peak at similar to 375 nm exist. The lifetimes of both PL emissions are very sensitive to the surroundings. Multiple emitting states that give excitation-dependent PL are ascribed to the inhomogeneous properties in prepared carbon nanodots, which is supported by the fluorescence lifetime image measurements. Electrophotoluminescence spectrum, that is, the electric-field-induced change in PL spectrum, has also been observed for the excitation-independent PL of CDs embedded in a poly(methyl methacrylate) film, and the magnitude of the change in electric dipole moment and molecular polarizability following emission has been determined.
Hydrogen-Bonding-Mediated Solid-State Self-Assembled Isoepindolidiones (isoEpi) Crystal for Organic Field-Effect Transistor
(2018-03-22)
Zhang, Haichang
;
Liu, Kewei
;
Wu, Kuan-Yi
;
Chen, Yu-Ming
;
Deng, Ruonan
Novel pigments isoepindolidiones (isoEpi) and di-tert-butyl quinolino[8,7-h]quinoline-1,7-diyl bis(carbonate) (isoEpi-Boc) were synthesized and characterized. The spectroscopic characterizations indicated that the tert-butyloxycarbonyl (t-Boc) units could be removed from soluble isoEpi-Boc by thermal annealing, forming insoluble isoEpi with hydrogen bonding. A solid-state isoEpi-Boc crystal to isoEpi crystal transition was observed during the annealing process and the molecular packing was significantly changed. With the emergence of hydrogen bonds, the isoEpi molecules were arranged into a brick-in-wall structure with pi-stacking along the crystal growth axis, leading to a significant enhancement of charge mobility along the crystal growth direction (the hole mobility from 3.4 x 10(-4) to 0.32 cm(2)/(V.s), and the electron mobility from nondetectable to 5.6 x 10(-3) cm(2)/(V.s)). The results indicate that isoEpi is a promising chromophore for organic field-effect transistor (OFET). The crystal-to-crystal transition driven by the formation of hydrogen bonds is a unique method for modulating the charge transport properties in organic semiconductive materials for OFET devices.
Conductive bridge random access memory characteristics of SiCN based transparent device due to indium diffusion
(2018-03-23)
Kumar, Dayanand
;
Aluguri, Rakesh
;
Chand, Umesh
;
Tseng, Tseung-Yuen
;
電子工程學系及電子研究所
In this work, the transparent bipolar resistive switching characteristics of a SiCN-based ITO/ SiCN/AZO structure due to In diffusion from ITO is studied. The SiCN based device is found to be 80% transparent in the visible wavelength region. This device, with AZO as both top and bottom electrodes, does not show any RRAM property due to deposition of the high quality O-2-free SiCN film. Replacing the AZO top electrode with ITO in this device results in good resistive switching (RS) characteristics with a high on/off ratio and long retention. Replacing the SiCN film with ZrO2 also results in excellent RS characteristics due to the formation of an oxygen vacancies filament inside the ZrO2 film. A resistance ratio of on/off is found to be higher in the SiCN based device compared to that of the ZrO2 device. Diffusion of In from ITO into the SiCN film on application of high positive voltage during forming can be attributed to the occurrence of RS in the device, which is confirmed by the analyses of energy dispersive spectroscopy and secondary-ion mass spectrometry. This study shows a pathway for the fabrication of CBRAM based transparent devices for non-volatile memory application.
生命出境手冊　台灣殯葬近況
(2018-03-25)
范瑀真
;
Department of Communication and Technology
;
傳播與科技學系
【生命出境手冊】專題

如果生命是飛鴻踏雪，那死亡便是爪上雪泥滴落的瞬間。手冊在手，讓你第一次認識台灣殯葬就上手。
以受虐為樂　虐GAME沉迷之因
(2018-03-25)
黃昱晉
;
Department of Communication and Technology
;
傳播與科技學系
【遊戲與玩家】專題

介紹虐GAME的興起與玩家對遊戲的心態。
幸運是我　徬徨裡租一份真情
(2018-03-25)
蕭巧昱
;
Department of Communication and Technology
;
傳播與科技學系
【遺忘芳華　丟失在回憶邊境的住民】專題你遺忘了整個世界，而且終將不會記得我，我是否還願意執起你的手，伴你前行。淺談溫馨小品《幸運是我》。
設計是什麼？從大師的雙眼出發
(2018-03-25)
郭庭芸
;
Department of Communication and Technology
;
傳播與科技學系
【不只是美　看見設計的力量】專題

保羅．蘭德堪稱世界上最偉大的平面設計師，《設計是什麼？：保羅．蘭德給年輕人的第一堂啟蒙課》一書記錄的是他授課時思想的精華。
動動滑鼠　劇場幕後大直擊
(2018-03-25)
朱珈漪
;
Department of Communication and Technology
;
傳播與科技學系
【劇場到底在幹什麼？】專題

透過互動小動畫來讓您了解劇場幕後的工作人員有哪些。
電擊止痛？和惱人經痛說再見
(2018-03-25)
簡文怡
;
Department of Communication and Technology
;
傳播與科技學系
【擁抱女人　擁抱月事】專題

為生理痛所苦？一起來看看解決經痛的新解法。
總編輯的話
(2018-03-25)
蔡翔宇
;
Department of Communication and Technology
;
傳播與科技學系
本期為喀報283期，稿件共計13篇。本期頭題為《「韓流」來襲　粉絲經濟力量大》，完整、豐富的內容解析現今韓國娛樂產業中的粉絲經濟模式。
體育經費何處去？預算大解析
(2018-03-25)
顏維萱
;
Department of Communication and Technology
;
傳播與科技學系
【世大運之後】專題

在世大運璀璨成績之後，不免令人期待台灣體育的成長，而作為發展台灣體育的重要經費是怎麼運用的呢？
古都　時代下乘載的傳統風情
(2018-03-25)
林育平
;
Department of Communication and Technology
;
傳播與科技學系
【竹塹工藝傳承與沒落】專題

改編自川端康成經典長篇小說〈古都〉，點出日本傳統文化所面臨的時代衝擊，面對新潮流的推進，傳統產業究竟該何去何從？
一夕爆紅的溫床　社群力量大
(2018-03-25)
黃珮瑄
;
Department of Communication and Technology
;
傳播與科技學系
【人人都能當網紅？網紅勢力起飛】專題

網紅逐漸以意見領袖的模樣呈現在大眾面前，此篇概述網紅現象，以及社群力量如何讓網紅擁有影響力。
台灣全圖　空拍圖的影像處理
(2018-03-25)
葉宜瑩
;
Department of Communication and Technology
;
傳播與科技學系
【台灣太空探索之旅】專題

空拍圖是如何產生並定價的？透過台灣全圖來認識空拍圖。
「韓流」來襲　粉絲經濟力量大
(2018-03-25)
馮瑜庭
;
Department of Communication and Technology
;
傳播與科技學系
【韓流粉絲新現象】專題

「韓流」狂潮來襲，究竟粉絲間的經濟效益多大？讓本篇帶您深入了解。
罕病鬥士　吳婧瑄
(2018-03-25)
簡嘉瑩
;
Department of Communication and Technology
;
傳播與科技學系
【他們的故事　身心障礙者】

吳婧瑄是先天性成骨不全症病友，儘管承受了求學與就業上的不公平，她仍相信：只要心中有愛，也可以過得很幸福。
熱門電競項目的女性參與
(2018-03-25)
陳映瑜
;
Department of Communication and Technology
;
傳播與科技學系
【電競界的透明天花板】專題

呈現世界級電競項目裡的女性參與率。
Cosmogenic neutron production at Daya Bay
(2018-03-26)
An, F. P.
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Balantekin, A. B.
;
Band, H. R.
;
Bishai, M.
;
Blyth, S.
Neutrons produced by cosmic ray muons are an important background for underground experiments studying neutrino oscillations, neutrinoless double beta decay, dark matter, and other rare-event signals. A measurement of the neutron yield in the three different experimental halls of the Daya Bay Reactor Neutrino Experiment at varying depth is reported. The neutron yield in Daya Bay's liquid scintillator is measured to be Y-n = (10.26 +/- 0.86) x 10(-5), (10.22 +/- 0.87) x 10(-5), and (17.03 +/- 1.22) x 10(-5) mu(-1)g(-1)cm(2) at depths of 250, 265, and 860 meters-water-equivalent. These results are compared to other measurements and the simulated neutron yield in FLUKA and GEANT4. A global fit including the Daya Bay measurements yields a power law coefficient of 0.77 +/- 0.03 for the dependence of the neutron yield on muon energy.