Browsing by Issue Date, starting with "2017-05-11"

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Synergistic Effect of Hydrogenation and Thiocyanate Treatments on Ag-Loaded TiO2 Nanoparticles for Solar-to-Hydrogen Conversion
(2017-05-11)
Wang, T. T.
;
Raghunath, P.
;
Lin, Y. G.
;
Lin, M. C.
;
應用化學系分子科學碩博班
H-2 evolution rate enhanced by Ag-loading on 25 nm TiO2 anatase nanopatticles (denoted as Ag/TiO2), Ag-loaded on hydrogenated TiO2 NPs (Ag/H:TiO2), as well as by the treatment of both NPs with potassium thiocyanate (KSCN) solution have been systematically investigated in conjunction with quantum-chemical-calculations and XANES and EXAFS analyses with synchrotron radiation. We have observed a cumulative enhancement effect of these fabrication processes on solar to;hydrogen A To(STH) conversion using a. simulating light source, Ag/TiO2 shows an enhanced visible absorption with 4-5 tiine increase in H-2 evolutioh over that of TiO2 or H:TiO2 prepared under mild hydrogenation conditions, while Ag/H:TiO2 exhibits an even greater UV visible absorption, similar to that of Ag/H:TiO2 with 3.1 times higher STH than that of Ag/TiO2. The treatment of Ag/TiO2 and Ag/H:TiO2 NPs With 0.1 mM KSCN solution, further increases:their STHs by 3.6 and 2.8 times, respectively. Optimization of KSCN concentration up to 02 mM gave [H-2] production rate rise to 2.75 mmol h(-1) g(-1) under Xe lamp illumination for the AgSCN/H:TiO2 system, which has also been tested for its durability, showing a notable robustness. The observed synergistic effect of TiO2 hydrogenation and SCN treatment of the Ag/H:TiO2 NPs has been corroborated by the results of quantum chemical elucidation of H2 production mechanism and the photocatalytic effects of Ag/H:TiO2 and AgSCN/H:TiO2 NPs revealed by appearances of new sub-band states within the TiO2 bandgap, as well as by the result of XANES and EXAFS analyses which support the electron pulling effect of the SCN group attached to Ag. Finally, we have also compared the efficacies of H-2, HCOOH, and CH3OH as hydrogenation sources at 300 degrees C and the efficacies of CH3OH, C2H5OH, and sucrose as sacrificial agent to facilitate the separation of the electron from the hole.
ONE-DIMENSIONAL TITANIUM NANOSTRUCTURE AND METHOD FOR FABRICATING THE SAME
(2017-05-11)
Tze-Lung Chen
;
Hsin-Tien Chiu
;
Chi-Young Lee
A one-dimensional titanium nanostructure and a method for fabricating the same are provided. A titanium metal reacts with titanium tetrachloride to form the one-dimensional titanium nanostructure on a heat-resistant substrate in a CVD method and under a reaction condition of a reaction temperature of 300-900° C., a deposition temperature of 200-850° C., a flow rate of the carrier gas of 0.1-50 sccm and a reaction time of 5-60 hours. The titanium nanostructure includes titanium nanowires, titanium nanobelts, flower-shaped titanium nanowires, titanium nanorods, titanium nanotubes, and titanium-titanium dioxide core-shell structures. The titanium nanostructure can be densely and uniformly grown on the heat-resistant substrate. The present invention neither uses a template nor uses the complicated photolithographic process, solution preparation process, and mixing-coating process. Therefore, the process scale-up, cost down, and the simplified production process are achieved.
OPTICALLY VISUALIZED ANTI-COUNTERFEITING ELECTRONIC INTEGRATED APPARATUS AND MANUFACTURING METHOD THEREOF
(2017-05-11)
Wen-Chieh LIN
;
Mu-Tien LU
An optically visualized anti-counterfeiting electronic integrated apparatus includes a housing, light sources and spectroscopic structures. The housing has tunnels each with an incident end and an exit end respectively present on opposite sides of the housing. The light sources are respectively configured to emit first lights with a first spectrum range. The spectroscopic structures are respectively disposed in the channels, and are respectively configured to separate second lights from the first lights to the exit ends, in which the second lights have a second spectrum range within the first spectrum range.
玉蘭花的一生
(2017-05-14)
張巧宜
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Department of Communication and Technology
;
傳播與科技學系
香氣逼人的玉蘭花在採摘後需要快速保存新鮮度，並從產地運送到市區，在清晨到達賣花小販手中。
神棍樂團　乩童搖滾新思維
(2017-05-14)
鄧涵文
;
Department of Communication and Technology
;
傳播與科技學系
神棍樂團將搖滾樂融合傳統國樂，唱出對現實的不滿和一針見血，他們稱自己這種創新的訴說方式為「乩童搖滾」。
陣頭文化　台灣街頭藝術
(2017-05-14)
何書馨
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Department of Communication and Technology
;
傳播與科技學系
以圖表呈現陣頭文化的起源、意義與社會刻板印象，以及當今陣頭分類概況。
原文書拼圖
(2017-05-14)
陳奕璇
;
Department of Communication and Technology
;
傳播與科技學系
利用七本原文書封面的字母，排出自己創作的短句。有知識無所不在、希望能出人頭地的意涵。
不只是甜點店　動手樂趣多
(2017-05-14)
黃佳俐
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Department of Communication and Technology
;
傳播與科技學系
介紹近年流行讓消費者自己做甜點的風潮。
總編輯的話
(2017-05-14)
劉以寧
;
Department of Communication and Technology
;
傳播與科技學系
本期為喀報265期，頭題「表露心跡筆跡的世界」，內容介紹日漸蓬勃的「筆跡分析」，描述筆跡分析師如何從筆畫之間細微的不同，看出書寫者的個性與思維。
表露心跡　筆跡的世界
(2017-05-14)
何家沂
;
Department of Communication and Technology
;
傳播與科技學系
粗淺介紹筆跡分析的內涵。
燦爛時光　異鄉人的書房
(2017-05-14)
鄭懿君
;
Department of Communication and Technology
;
傳播與科技學系
位於中和區興南路的「燦爛時光」為台灣少數以東南亞為主題開設之獨立書店。透過書籍的借閱、活動的興辦，努力為異鄉人營造一個舒適、友善的閱讀環境，並鼓勵他們找尋同好，追尋屬於自己的燦爛時光。
不一樣的旅行　打工度假
(2017-05-14)
沈慶柔
;
Department of Communication and Technology
;
傳播與科技學系
近年打工度假越趨流行，越來越多年輕人用一年的時間出國打工度假，邊工作邊旅行，累積人生經驗。
愛媽的無悔付出　貓花公園
(2017-05-14)
陳昱彣
;
Department of Communication and Technology
;
傳播與科技學系
記錄貓花公園的流浪貓以及愛心媽媽。
母語教學　新移民出擊
(2017-05-14)
王韋翔
;
Department of Communication and Technology
;
傳播與科技學系
新移民已經成為了台灣一個重要的族群，現在他們正努力讓台灣了解他們的語言與文化。
PM 2.5嚴重嗎？
(2017-05-14)
張芳語
;
Department of Communication and Technology
;
傳播與科技學系
詳解PM 2.5，包含其產生、內容物、造成的影響等等。
O2O模式知多少
(2017-05-14)
彭書耘
;
Department of Communication and Technology
;
傳播與科技學系
現今電子商務模式中，離人們最近的O2O電商模式，你知道多少呢？
做工的人　鋼筋水泥裡的情
(2017-05-14)
洪于婷
;
Department of Communication and Technology
;
傳播與科技學系
有人說這是本勞動書寫、勞工紀實、底層勞動者的生命故事。工地主任林立青，用簡潔有力的筆觸帶讀者深入了解勞動者的酸甜苦辣。
In vitro and in vivo imaging of peroxynitrite by a ratiometric boronatebased fluorescent probe
(2017-05-15)
Palanisamy, Sathyadevi
;
Wu, Pei-Yu
;
Wu, Shou-Cheng
;
Chen, Yu-Jen
;
Tzou, Shey-Cherng
Peroxynitrite (ONOO-) is an important species involved in many physiopathological processes. Progresses have been made in developing novel fluorescent probes to detect peroxynitrite with relatively high sensitivity and specificity. Herein, we report the synthesis, characterization and biological applications of a new boronate-based fluorescent probe, 4-MB. The studies showed that 4-MB exhibits a dual ratiometric and calorimetric response toward peroxynitrite due to ONOO--triggered oxidative reaction. A possible mechanism of the oxidation reaction was proposed and the reaction product was isolated and characterized using different spectroscopic methods. We have thoroughly demonstrated the utility of 4-MB for intracellular peroxynitrite imaging. Further, we showed that 4-MB can be potentially employed to visualize exogenous and endogenous peroxynitrite in RAW264.7 macrophages, EAhy926 cells, zebrafish and in live tissues from a high-fat diet-induced obese mouse model.
Enhancement of resistive switching properties in nitride based CBRAM device by inserting an Al2O3 thin layer
(2017-05-15)
Kumar, Dayanand
;
Aluguri, Rakesh
;
Chand, Umesh
;
Tseng, Tseung-Yuen
;
電子工程學系及電子研究所
In this letter, we propose a method to enhance resistive switching properties in SiCN-based conductive-bridge resistive switching memory (CBRAM) devices by inserting a thin Al2O3 layer between the SiCN resistive switching layer and the TiN bottom electrode. Compared with the Cu/Ta/SiCN/TiN single-layer device, the Cu/Ta/SiCN/Al2O3/TiN double layer device exhibits uniform resistive switching, long stable endurance cycles (>1.6 x 10(4)), and stable retention (10(4)s) at 125 degrees C. These substantial improvements in the resistive switching properties are attributed to the location of the formation and rupture of conductive filaments that can be precisely controlled in the device after introducing the Al2O3 layer. Moreover, a multilevel resistive switching characteristic is observed in the Cu/Ta/SiCN/Al2O3/TiN double layer CBRAM device. The distinct six-level resistance states are obtained in double layer devices by varying the compliance current. The highly stable retention characteristics (>10(4)) of the Cu/Ta/SiCN/Al2O3/TiN double layer device with multilevel resistance states are also demonstrated. Published by AIP Publishing.
The effect of device electrode geometry on performance after hot-carrier stress in amorphous In-Ga-Zn-O thin film transistors with different via-contact structures
(2017-05-15)
Liao, Po-Yung
;
Chang, Ting-Chang
;
Chen, Yu-Jia
;
Su, Wan-Ching
;
Chen, Bo-Wei
In this letter, the effects of hot carriers on amorphous In-Ga-Zn-O thin film transistors (TFTs) of different geometric structures were investigated. Three types of via-contact structure TFTs are used in this experiment, defined as source-drain large (SD large), source-drain normal (SD normal), and fork-shaped. After hot-carrier stress, the I-V curves of both SD normal and fork-shaped TFTs with U-shaped drains show a threshold voltage shift along with the parasitic transistor characteristic in the reverse-operation mode. Asymmetrical degradation is exhibited in an ISE-TCAD simulation of the electric field, which shows the distribution of hot electrons injected into the etch-stop layer below the redundant drain electrode. Published by AIP Publishing.