Browsing by Issue Date, starting with "2018-05-16"

Now showing 1 - 20 of 10699

Distributed Bragg Reflectors as Broadband and Large-Area Platforms for Light-Coupling Enhancement in 2D Transition-Metal Dichalcogenides
(2018-05-16)
Chen, Yen-Chun
;
Yeh, Han
;
Lee, Chien-Ju
;
Chang, Wen-Hao
;
電子物理學系
Two-dimensional (2D) semiconductors, particularly the direct-gap monolayer transition metal dichalcogenides (TMDs), are currently being developed for various atomically thin optoelectronic devices. However, practical applications are hindered by their low quantum efficiencies in light emissions and absorptions. While photonic cavities and metallic plasmonic structures can significantly enhance the light-matter interactions in TMDs, the narrow spectral resonance and the local hot spots considerably limit the applications when broadband and large area are required. Here, we demonstrate that a properly designed distributed Bragg reflector (DBR) can be an ideal platform for light-coupling enhancement in 2D TMDs. The main idea is based on engineering the amplitude and phase of optical reflection from the DBR to produce optimal substrate-induced interference. We show that the TMDs photoluminescence, Raman, and second harmonic generation signals of monolayer WSe2 can be enhanced by a factor of 26, 34, and 58, respectively. The proposed DBR substrates pave the way for developing a range of 2D optoelectronic devices for broadband and large-area applications.
SELECTIVE CHEMICAL BATH DEPOSITION OF IRIDIUM OXIDE ON THIN FILM FLEXIBLE SUBSTRATES
(2018-05-17)
LIU, Wentai
;
CHANG, Chih-Wei
;
WU, Pu-Wei
;
WU, Chung-Yu
;
CHEN, Pu-Chun
A flexible thin film metal oxide electrode fabrication methods and devices are provided and illustrated with thin film polyimide electrode formation and IrOx chemical bath deposition. Growth factors of the deposited film such as film thickness, deposition rate and quality of crystallites can be controlled by varying the solution pH, temperature and component concentrations of the bath. The methods allow for selective deposition of IrOx on a flexible substrate (e.g. polyimide electrode) where the IrOx will only coat onto an exposed metal area but not the entire device surface. This feature enables the bath process to coat the IrOx onto every individual electrode in one batch, and to ensure electrical isolation between channels. The ability to perform selective deposition, pads for external connections will not have IrOx coverage that would otherwise interfere with a soldering/bumping process.
Tunable Spectrum Selectivity for Multiphoton Absorption with Enhanced Visible Light Trapping in ZnO Nanorods
(2018-05-17)
Tan, Kok Hong
;
Lim, Fang Sheng
;
Toh, Alfred Zhen Yang
;
Zheng, Xia-Xi
;
Dee, Chang Fu
Observation of visible light trapping in zinc oxide (ZnO) nanorods (NRs) correlated to the optical and photoelectrochemical properties is reported. In this study, ZnO NR diameter and c-axis length respond primarily at two different regions, UV and visible light, respectively. ZnO NR diameter exhibits UV absorption where large ZnO NR diameter area increases light absorption ability leading to high efficient electron-hole pair separation. On the other hand, ZnO NR c-axis length has a dominant effect in visible light resulting from a multiphoton absorption mechanism due to light reflection and trapping behavior in the free space between adjacent ZnO NRs. Furthermore, oxygen vacancies and defects in ZnO NRs are associated with the broad visible emission band of different energy levels also highlighting the possibility of the multiphoton absorption mechanism. It is demonstrated that the minimum average of ZnO NR c-axis length must satisfy the linear regression model of Z(p,min) = 6.31d to initiate the multiphoton absorption mechanism under visible light. This work indicates the broadening of absorption spectrum from UV to visible light region by incorporating a controllable diameter and c-axis length on vertically aligned ZnO NRs, which is important in optimizing the design and functionality of electronic devices based on light absorption mechanism.
Zebrafish VCAP1X2 regulates cardiac contractility and proliferation of cardiomyocytes and epicardial cells
(2018-05-18)
Hsieh, Fang-Chi
;
Lu, Yu-Fen
;
Liau, Ian
;
Chen, Chien-Chang
;
Cheng, Chao-Min
Sarcomeric signaling complexes are important to sustain proper sarcomere structure and function, however, the mechanisms underlying these processes are not fully elucidated. In a gene trap experiment, we found that vascular cell adhesion protein 1 isoform X2 (VCAP1X2) mutant embryos displayed a dilated cardiomyopathy phenotype, including reduced cardiac contractility, enlarged ventricular chamber and thinned ventricular compact layer. Cardiomyocyte and epicardial cell proliferation was decreased in the mutant heart ventricle, as was the expression of pAKT and pERK. Contractile dysfunction in the mutant was caused by sarcomeric disorganization, including sparse myofilament, blurred Z-disc, and decreased gene expression for sarcomere modulators (smyd1b, mypn and fhl2 alpha), sarcomeric proteins (myh6, myh7, vmhcl and tnnt2 alpha) and calcium regulators (ryr2b and slc8a1 alpha). Treatment of PI3K activator restored Z-disc alignment while injection of smyd1b mRNA restored Z-disc alignment, contractile function and cardiomyocyte proliferation in ventricles of VCAP1X2 mutant embryos. Furthermore, injection of VCAP1X2 variant mRNA rescued all phenotypes, so long as two cytosolic tyrosines were left intact. Our results reveal two tyrosine residues located in the VCAP1X2 cytoplasmic domain are essential to regulate cardiac contractility and the proliferation of ventricular cardiomyocytes and epicardial cells through modulating pAKT and pERK expression levels.
Single-fabrication-step Ge nanosphere/SiO2/SiGe heterostructures: a key enabler for realizing Ge MOS devices
(2018-05-18)
Liao, P. H.
;
Peng, K. P.
;
Lin, H. C.
;
George, T.
;
Li, P. W.
We report channel and strain engineering of self-organized, gate-stacking heterostructures comprising Ge-nanosphere gate/SiO2/SiGe-channels. An exquisitely-controlled dynamic balance between the concentrations of oxygen, Si, and Ge interstitials was effectively exploited to simultaneously create these heterostructures in a single oxidation step. Process-controlled tunability of the channel length (5-95 nm diameters for the Ge-nanospheres), gate oxide thickness (2.5-4.8 nm), as well as crystal orientation, chemical composition and strain engineering of the SiGe-channel was achieved. Single-crystalline (100) Si1-xGex shells with Ge content as high as x = 0.85 and with a compressive strain of 3%, as well as (110) Si1-xGex shells with Ge content of x = 0.35 and corresponding compressive strain of 1.5% were achieved. For each crystal orientation, our high Ge-content, highly-stressed SiGe shells feature a high degree of crystallinity and thus, provide a core 'building block' required for the fabrication of Ge-based MOS devices.
彩虹起義　平權公投
(2018-05-20)
嚴銘浩
;
蔡亞融
;
Department of Communication and Technology
;
傳播與科技學系
【彩虹路上】專題

彩虹起義台灣行動大隊第一次公投說明會發起人中苗博雅、法律白話文王鼎棫之影音專訪。
失智照護新趨勢　為高齡化領航
(2018-05-20)
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

高齡化已是社會中不可擋的趨勢，伴隨著失智症盛行率增加的問題，本圖標將帶您一探失智照護的發展現況。
僑生大學生活　三大挑戰
(2018-05-20)
關子茵
;
Department of Communication and Technology
;
傳播與科技學系
【僑生面面觀】專題

僑生在大學的生活的如何？又會遇到什麼問題和抉擇呢？有些問題，不只僑生，就連本地學生也會遇到，該如何解決呢？
從業務員變玩具醫生──馮寶安
(2018-05-20)
楊巧柔
;
Department of Communication and Technology
;
傳播與科技學系
【二手玩具物流】專題

玩具也有醫生？玩具醫生馮寶安從圖書業務變為玩具救星！
林端容　突破創業者的窘境
(2018-05-20)
王貞懿
;
Department of Communication and Technology
;
傳播與科技學系
【破繭而出的年輕世代】專題

青年創業潮持續發燒，許多年輕人想自行創業，卻在許多地方遇到阻礙。創辦Changee及Simpany的林端容，根據創業者的需求提供相對應的協助。
彩虹辭典
(2018-05-20)
郭庭芸
;
Department of Communication and Technology
;
傳播與科技學系
【彩虹路上】專題

以互動網頁形式，收錄常見之性別議題相關名詞，用活潑有趣的方式協助讀者熟悉詞意，能夠更加輕鬆地閱讀本專題。
彩虹路上
(2018-05-20)
嚴銘浩
;
簡文怡
;
戴葦婷
;
蔡亞融
;
徐仟妤
多元性別的議題越來越受關注，台灣更有可能成為亞洲第一個合法讓同性戀結婚的地方，但社會上又是不是每一個人都了解當中的所有。因此我們就希望以這一次的專題報導去解決大眾對這個主題的困惑。
各國重機法規小教室
(2018-05-20)
蔡翔宇
;
Department of Communication and Technology
;
傳播與科技學系
【被壓抑的野獸　重機族群的困境】專題

本篇圖表帶您簡單地了解各國關於重機的法律有哪些不同。
總編輯的話
(2018-05-20)
馮瑜庭
;
Department of Communication and Technology
;
傳播與科技學系
本期為喀報290期，稿件共計12篇，類型多元並出現兩則以廣播為媒材的報導。本期專題「彩虹路上」採用豐富媒材帶領讀者深入了解同志議題，並點出同志在台灣面臨的現況。
從卡通看見多元性別教育
(2018-05-20)
徐仟妤
;
Department of Communication and Technology
;
傳播與科技學系
【彩虹路上】專題

觀察卡通中的多元性別題材，並探索在性別平等教育的可能性。
日常對話　對你講出心內話
(2018-05-20)
簡文怡
;
Department of Communication and Technology
;
傳播與科技學系
【彩虹路上】專題

有個T媽媽是怎樣的感受？當共享傷痛，要如何練習對身邊的人說愛？看黃惠偵用紀錄片與母親超渡黑暗、相依扶持。
用心和毅力　女力征服太空
(2018-05-20)
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

身為少數在台灣太空領域工作的女性，朱崇惠如何成為台灣福衛系列計畫中首位女性計畫總主持人？
這些年台灣如何看待多元性別？
(2018-05-20)
戴葦婷
;
Department of Communication and Technology
;
傳播與科技學系
【彩虹路上】專題

從1996年的亞洲首個公開的同志婚禮，到走入校園、職場的性別工作平等法及性別平等教育法，再到2017年的同婚釋憲，乍看之下同性權益爭取十分順利，然而一路上其實走得顛簸。
到底台灣經歷了哪些事才蛻變成即將成為亞洲第一個同性婚姻合法化國家？一起點開動態圖表瞧瞧吧！
林聖修　獨自前行的出版之路
(2018-05-20)
戴淨妍
;
Department of Communication and Technology
;
傳播與科技學系
【紙本書與電子書】專題

專訪啟明出版社社長林聖修，了解他是如何闖出屬於自己的一片天。
交大e-News第255期-校長講座：毛治國教授談管理
(2018-05-21)
國立交通大學秘書室
;
Secretariat