学术报告
Metal Nanoparticle Array Formation by Pulsed Laser-induced Thin Film Dewetting and Their Applications由脉冲激光诱导薄膜脱湿形成的金属纳米颗粒阵列及其应用
点击数:4     发布日期:2017-11-06     发布部门:科技处

报告题目:Metal Nanoparticle Array Formation by Pulsed Laser-induced Thin Film Dewetting and Their Applications由脉冲激光诱导薄膜脱湿形成的金属纳米颗粒阵列及其应用

报告人姓名:侍育军

报告人概况

侍育军教授现任教于加拿大卡尔加里大学化学系。她1988年在苏州大学取得学士学位,1991年在苏州大学取得硕士学位,2001年于加拿大安大略西部大学(今西部大学)取得博士学位。她博士后获得了NSERC访问奖学金,工作于加拿大研究委员会斯泰西分子科学研究所。2003年,侍教授在加拿大卡尔加里大学担任助理教授,开始了她独立的科研工作。她的团队的科研方向主要是激光脱湿法合成金属纳米颗粒的应用,发展激光分析技术,并且在分子水平上理解化学气相沉积。她的研究工作发表在同行评审期刊上,包括Acc Chem Res, Adv Mater  Adv Funct Mater. 侍教授2012年开始担当加拿大化学期刊的副主编。

Dr. Yujun Shi is a Professor in the Department of Chemistry at the University of Calgary in Canada. She received her BSc/MSc in Chemistry in 1988/1991 from Soochow University in China, her PhD in Chemistry in 2001 from the University of Western Ontario (now Western University) in Canada. She did her postdoctoral work in the Steacie Institute for Molecular Sciences at the National Research Council of Canada with an NSERC Visiting Fellowship. In 2003, Dr. Shi started her independent career as an Assistant Professor in the Department of Chemistry at the University of Calgary. Her group’s research focuses on application of laser dewetting methods for metal nanoparticle formation, development of laser analytical techniques, and understanding the chemical vapor deposition at a molecular level. Her research has been published in peer-reviewed journals, including Acc Chem Res, Adv Mater and Adv Funct Mater. She has served the role of the Associate Editor of Canadian Journal of Chemistry since 2012.

报告内容:

有序金属纳米颗粒阵列有很多用途,比如,作为半导体纳米线/碳纳米管生长的催化阵列和燃料电池中电催化评估的模型电极。与湿化学方法和纳米图案光刻法相比,脉冲激光诱导脱湿是一种多功能,简单和高效的合成尺寸和形状可控的金属纳米颗粒的方法。这次报告中,我会展示大家最近在单层金属薄膜脉冲激光诱导脱湿法制金、铂、和银的纳米颗粒的工作,以及由双层薄膜脉冲激光诱导脱湿合成双金属纳米颗粒的工作。大家的工作显示了脉冲激光诱导脱湿法可以用于合成低熔点和高熔点金属的纳米颗粒,提供了一种有效的可替代热脱湿的方法。并且,定量的数据表明脉冲激光诱导脱湿的金和铂遵循调幅脱湿机制。铂和金的双金属纳米颗粒可以通过双层薄膜的脉冲激光诱导脱湿制得,不受喷镀顺序的影响。我也会讨论金纳米颗粒作为催化剂在化学气相沉积法中硅纳米线生长的应用。

Ordered arrays of metal nanoparticles (NPs) have found many applications, for example, as catalyst arrays for the growth of semiconductor nanowires/carbon nanotubes and as model electrodes for electrocatalyst evaluation in fuel cells. Compared to wet chemical methods and lithography-based nanopatterning, pulsed laser-induced dewetting (PLiD) is a versatile, simple, and high throughput method for the synthesis of metallic NPs of controlled size and shape. In this talk, I will present our recent work on the formation of Au, Pt, and Ag NPs via PLiD of single-layer metallic thin films and the fabrication of bimetallic NPs from PLiD of bilayer thin films. Our work has showns that PLiD can be used to produced NPs of both low-melting-point and high-melting-point metals, providing a powerful alternative to thermal dewetting. In addition, quantitative evidence has been provided to show that PLiD of Au and Pt follows spinodal dewetting mechanism. Pt@Au bimetallic NPs can be produced via PLiD of bilayer thin films, independent of the sputtering sequence. The application of the Au NPs as catalysts in silicon nanowire growth in a chemical vapor deposition process will also be presented.

报告时间:2017117日星期二上午10

报告地点:综合实验楼五楼,理学院报告厅

举办部门:环化学院


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