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能源与资源工程系学术报告
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Phase Change-Induced Liquid Droplet Actuations on Structured Surfaces– Applications in Colloidal Manipulations
相变引起的液滴在结构表面上的驱动效应及其对微颗粒的操控应用 |
报告人：程江涛 博士
美国弗吉尼亚理工大学机械工程系教授
主持人：杨荣贵 教授
时 间：7月5日（周五）14:00-15:30
地 点：新奥工学大楼3F-3048会议室
报告摘要：
In many cases, handling fluids and particles are regarded as two important but separate tasks, which are approached individually and independently by fundamentally different physical means. Here, I present strategies and methodologies on simultaneous manipulations of fluids and colloidal particles via phase change-induced liquid droplet actuations. The first topic is evaporation-triggered directional transport of asymmetrically confined droplet in beak-like structures. When a liquid droplet is confined between two non-parallel hydrophobic surfaces, the droplet morphology under confinement will continuously evolve during evaporation, leading to the directional transport of the droplet towards the cusp. The second topic is partial Leidenfrost evaporation-assisted rapid analyte enrichment in droplet and ultrasensitive surface-enhanced Raman spectroscopy (SERS) on micro/nano-structured plasmonic surfaces. And the third topic is Leidenfrost-like jumping of boiling droplet on hot micro-structured surfaces for deep cleaning of fouling even in surface roughness and interstices. Our findings on the intrinsic mechanisms of droplet actuations shed light on a novel approach to regulating the sessile or confined droplet’s behaviors in a passive and decisive fashion.
报告人简介：
程江涛博士，美国弗吉尼亚理工大学机械工程系教授。主要研究方向为微纳米流体、多相流体动力学、传热学与微电子器件冷却、微流控光学、可再生能源利用等。研究工作获得美国2010年度太阳能最佳发明奖和6次国际大会最佳论文奖。2013年获得中国国家自然科学基金委海外杰出青年学者奖。2016年获得弗吉尼亚理工大学关键技术与应用科学研究院的青年教师奖。2021年当选美国机械工程师学会（ASME）会士。受邀成为70多个国际期刊和国际会议的审稿人，担任多个国际大会的分会主席等。在国际顶级期刊和国际重要会议上发表文章80余篇。
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