时间:2017年8月6日上午9点
地点:旗山校区理工实验楼3-303
主讲:美国弗吉尼亚联邦大学virginia commonwealth university 物理系副教授 叶德贤
主办:物理与能源学院、福建省量子调控与新能源材料重点实验室、福建省太阳能转换与储能工程技术研究中心
专家简介:叶德贤,现为Virginia Commonwealth University(VCU)物理系副教授。于1992-1997年就读于北京大学地球物理系并获得学士学位。2006年从位于纽约州Troy市的Rensselaer Polytechnic Institute物理系获得物理学博士学位。其PhD导师是著名半导体集成电路Back-end-of-line工艺和材料学家Toh-Ming Lu教授。叶德贤在Lu教授实验室继续博士后研究,期间和多位学者合作,包括Gwo-Ching Wang,Om Nalamasu,Shawn-Yu Lin等。他于2009年前往VCU物理系任教至今。叶德贤教授的研究领域主要是基于物理气相沉积(PVD)的纳米材料生长和应用。通过Monte Carlo模拟,叶教授揭示了弹道吸附过程是引起纳米结构侧向生长的重要机理,以及发现了部分金属纳米材料形成针尖形状的现象,并用这些针尖实现电磁场的本地增强效应。最近,叶德贤教授开始研究金属氧化物纳米材料的生长,以及多组分材料的生长动力学机理。
摘要:A viable technique that can produce nanostructures massively and cost-efficiently is essential to realize the promise of nanotechnology. In this talk, a novel nanofabrication technique, as we called it as “dynamic oblique angle deposition”, will be introduced. It has been developed by several groups including us in the past few years to produce three-dimensional (3D) nanostructures of a large variety of material. This technique combines oblique angle deposition with substrate motions in a physical vapor deposition system to produce 3D nanostructure arrays.
In this talk, I will focus on our current understanding of the growth mechanisms in dynamic oblique angle deposition and present the abnormal growth behaviors in certain metals, calcium fluoride, and titanium nitride. In addition, I will demonstrate unique properties and possible applications of metal and fluoride nanostructures fabricated in our lab.