Browsing by Issue Date, starting with "2020-05-28"

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Photo-induced electrodeposition of metallic nanostructures on graphene
(2020-05-28)
Xia, Kangwei
;
Chiang, Wei-Yi
;
de la Rosa, Cesar Javier Lockhart
;
Fujita, Yasuhiko
;
Toyouchi, Shuichi
Graphene, a single atomic layer of sp(2)hybridized carbon, is a promising material for future devices due to its excellent optical and electrical properties. Nevertheless, for practical applications, it is essential to deposit patterned metals on graphene in the micro and nano-meter scale in order to inject electrodes or modify the 2D film electrical properties. However, conventional methods for depositing patterned metals such as lift-off or etching leave behind contamination. This contamination has been demonstrated to deteriorate the interesting properties of graphene such as its carrier mobility. Therefore, to fully exploit the unique properties of graphene, the controlled and nano-patterned deposition of metals on graphene films without the use of a sacrificial resist is of significant importance for graphene film functionalization and contact deposition. In this work, we demonstrate a practical and low-cost optical technique of direct deposition of metal nano-patterned structures without the need for a sacrificial lift-off resist. The technique relies on the laser induced reduction of metal ions on a graphene film. We demonstrate that this deposition is optically driven, and the resolution is limited only by the diffraction limit of the light source being used. Patterned metal features as small as 270 nm in diameter are deposited using light with a wavelength of 532 nm and a numerical aperture of 1.25. Deposition of different metals such as Au, Ag, Pd, Pb and Pt is shown. Additionally, change in the Fermi level of the graphene film through the nano-patterned metal is demonstrated through the electrical characterization of four probe field effect transistors.
Quantum yields of singlet and triplet chemiexcitation of dimethyl 1,2-dioxetane: ab initio nonadiabatic molecular dynamic simulations
(2020-05-28)
Yue, Ling
;
Yu, Le
;
Xu, Chao
;
Zhu, Chaoyuan
;
Liu, Yajun
The global nonadiabatic switching on-the-fly trajectory surface hopping simulation at the 8SA-CASSCF quantum level has been performed to estimate the quantum yield of chemiexcitation for the uncatalyzed decomposition reaction of the open-shell biradical trans-3,4-dimethyl-1,2-dioxetane system. The present ab initio nonadiabatic molecular dynamic simulation involving both conical intersection and intersystem crossing is to compute for the first time the population evolution of quantum yields at the four lowest singlet and four lowest triplet states. The simulated results demonstrate not only the stepwise dissociation of O-O and C-C bond breaking, but also confirm the existence of a biradical entropic trap which is responsible for chemiexcitation. The simulated quantum yield of the triplet chemiexcitation phi(T1) = 0.266 +/- 0.096 agrees with the experimental value of 0.20 +/- 0.04 very well. The present nonadiabatic molecular dynamic simulation of dimethyl 1,2-dioxetanes provides a further advanced understanding and stepping stone for future studies on chemi- and bio-luminescence.
陽明與華碩AICS推動「華陽計畫」，為台灣智慧醫療培育專才
(國立陽明大學, 2020-05-29)
陽明電子報編輯小組
醫療人工智慧如何更有效的掌握醫療大數據，創造多元而有價值的照護體系，備受期待。華碩AI研發中心AICS於5月19日宣布與國立陽明大
45周年校慶日，郭校長率年輕教師韓園獻花
(國立陽明大學, 2020-05-29)
陽明電子報編輯小組
5月15日是陽明45周年校慶日，郭旭崧校長特地邀請45歲以下的年輕老師，一起到韓園獻花，向創校的韓偉院長致意；一方面緬懷陽明創校
Organ-on-a-Chip: Opportunities for Assessing the Toxicity of Particulate Matter
(2020-05-29)
Yang, Jia-Wei
;
Shen, Yu-Chih
;
Lin, Ko-Chih
;
Cheng, Sheng-Jen
;
Chen, Shiue-Luen
Recent developments in epidemiology have confirmed that airborne particulates are directly associated with respiratory pathology and mortality. Although clinical studies have yielded evidence of the effects of many types of fine particulates on human health, it still does not have a complete understanding of how physiological reactions are caused nor to the changes and damages associated with cellular and molecular mechanisms. Currently, most health assessment studies of particulate matter (PM) are conducted through cell culture or animal experiments. The results of such experiments often do not correlate with clinical findings or actual human reactions, and they also cause difficulty when investigating the causes of air pollution and associated human health hazards, the analysis of biomarkers, and the development of future pollution control strategies. Microfluidic-based cell culture technology has considerable potential to expand the capabilities of conventional cell culture by providing high-precision measurement, considerably increasing the potential for the parallelization of cellular assays, ensuring inexpensive automation, and improving the response of the overall cell culture in a more physiologically relevant context. This review paper focuses on integrating the important respiratory health problems caused by air pollution today, as well as the development and application of biomimetic organ-on-a-chip technology. This more precise experimental model is expected to accelerate studies elucidating the effect of PM on the human body and to reveal new opportunities for breakthroughs in disease research and drug development.
【完美求職系列講座】斜槓青年真本事，成功的意願
(國立陽明大學, 2020-05-29)
陽明電子報編輯小組
斜槓世代來臨，你，準備好了嗎？你希望你的人生是直線進行嗎.
【109年實驗動物福祉和動物權】
(國立陽明大學, 2020-05-29)
陽明電子報編輯小組
課程內容為有關動物保護法，實驗動物相關福祉和動物權之介紹。
「敘事心理學讀書會」讀書筆記
(國立陽明大學, 2020-05-29)
許伶楓
;
陽明電子報編輯小組
【陽明45周年校慶五大特展】
(國立陽明大學, 2020-05-29)
陽明電子報編輯小組
歡慶45周年校慶，校慶期間特推出五大特展，完整呈現陽明45年來的成長與成果，希望讓所有陽明人一起感受「陽明45．展翅飛舞」的...
人社院嚴偉哲老師獲選科技部「年度十大科研破壞性創新論文」
(國立陽明大學, 2020-05-29)
陽明電子報編輯小組
本校人社中心嚴偉哲（Jonathon Hricko）副教授與中正大學哲學系陳瑞麟講座教授，合著之〈實驗個體化與哲學的零散論證〉（Experime...
【高中生大數據能力探索】養成班
(國立陽明大學, 2020-05-29)
陽明電子報編輯小組
隨著AI人工智慧的發展，大數據探索能力愈來愈重要。為了讓高中
Formation and IR spectrum of monobridged Si2H4 isolated in solid argon
(2020-05-29)
Lin, Shu-Yu
;
Chou, Sheng-Lung
;
Lin, Meng-Yeh
;
Huang, Wen-Jian
;
Huang, Tzu-Ping
The infrared (IR) spectrum of monobridged Si2H4 (denoted as mbr-Si2H4) isolated in solid Ar was recorded, and a set of lines (in the major matrix site) observed at 858.3 cm(-1), 971.5 cm(-1), 999.2 cm(-1), 1572.7 cm(-1), 2017.7 cm(-1), 2150.4 cm(-1), and 2158.4 cm(-1) were characterized. The species was produced by the electron bombardment of an Ar matrix sample containing a small proportion of SiH4 during matrix deposition. Upon photolysis of the matrix samples using 365 nm and 160 nm light, the content of mbr-Si2H4 increased. The band positions, relative intensity ratios, and D-isotopic shift ratios of the observed IR features are generally in good agreement with those predicted by the B3LYP/aug-cc-pVTZ method. In addition, the photochemistry of the observed products was discussed.
Using gadolinium ions as affinity probes to selectively enrich and magnetically isolate bacteria from complex samples
(2020-05-29)
Wei, Jia-Lin
;
Huang, De-Yi
;
Chen, Yu-Chie
;
應用化學系
;
Department of Applied Chemistry
Magnetic trapping has been employed in the development of analytical methods owing to its ease and simplicity in handling samples. Nevertheless, the generation of functional probes is usually time consuming. A new and simple affinity method that uses gadolinium ion (Gd3+), a magnetic ion, as affinity probe for magnetic tapping of pathogenic bacteria was demonstrated in the present study. Escherichia coli O157:H7, Staphylococcus aureus, and Acinetobacter baumannii were selected as model bacteria. The model bacteria were magnetically isolated after incubation in Tris buffer (pH 8) containing Gd3+ (0.1 M) under microwave heating (power: 180 W, 90 s x 3). The resultant Gd3+-bacterium conjugates possessed sufficient magnetism, resulting in magnetic aggregations by an external magnet (similar to 4,000 Gauss). For ease of magnetic isolation, the sample containing Gd3+-bacterium complexes was stirred by a small magnet. After 1 h, the magnet attached with precipitates, i.e., Gd3+-bacterium conjugates, was readily removed using a pair of tweezers. The bacteria in the resultant conjugates were characterized by matrix-assisted laser desorption/ionization mass spectrometry. The limits of detection of the current approach toward E. coli O157:H7, S. aureus, and A. baumannii in complex samples were similar to 10(4)-10(5) cells mL(-1). (C) 2020 Published by Elsevier B.V.
【生命科學院－產學講座演講】蔡文城教授主講
(國立陽明大學, 2020-05-29)
陽明電子報編輯小組
本校微免所蔡文城教授退休後創辦「台美檢驗」，將實務經驗延伸
表演藝術，肢體與心靈的交織
(國立陽明大學, 2020-05-29)
蔡小童
;
陽明電子報編輯小組
關於表演藝術──除了展現自我，更多的是察覺、是感受。這是我參加表演藝術社後，對它最大的體會。燈光＋舞台技術＋導演課工作坊
陽明醫學系「醫師工程師組」，首次招生成績亮眼
(國立陽明大學, 2020-05-29)
陽明電子報編輯小組
陽明大學醫學系今年新設的「醫師工程師組」，5月21日分發結果出爐，10名正取生均完成分發；這批「黃埔一期」的新生，未來將是台灣
【109年承捷財產管理系統教育訓練】
(國立陽明大學, 2020-05-29)
陽明電子報編輯小組
為提供更便利的財產管理環境，本校財產管理系統將提升為網路版
【108學年度畢業典禮】
(國立陽明大學, 2020-05-29)
陽明電子報編輯小組
親愛的家長、老師及貴賓：唭哩岸上　萬木含春神農坡前　...
【專書閱讀導讀會】數據、謊言與真相
(國立陽明大學, 2020-05-29)
陽明電子報編輯小組
日期：6月4日（四）時間：10:30-12:10 地點：Jitsi Mee
生化所黃介嶸老師改寫「半乳糖凝集素」認知，榮登《自然通訊》期刊
(國立陽明大學, 2020-05-29)
陽明電子報編輯小組
凝集素是動物與人體內常見的醣結合蛋白，許多生命現象都經細胞的醣分子和凝集素的結合而產生，影響免疫調控與癌症轉移，也讓科學