題目：相變引起的液滴在結構表面上的驅動效應及其對微顆粒的操控應用
時間：2025年8月22日 15:30-17:00
地點：機械與動力工程學院 F310會議室
邀請人：錢小石 教授（前沿交叉研究中心）
報告人簡介
程江濤博士，美國弗吉尼亞理工大學機械工程系教授。主要研究方向為微納米流體、多相流體動力學、傳熱學與微電子器件冷卻、微流控光學、可再生能源利用等。研究工作獲得美國2010年度太陽能最佳發(fā)明獎和6次國際大會最佳論文獎。2013年獲得中國國家自然科學基金委海外杰出青年學者獎，2016年獲得弗吉尼亞理工大學關鍵技術與應用科學研究院的青年教師獎，2021年當選美國機械工程師學會（ASME）會士。受邀成為90多個國際期刊和國際會議的審稿人，擔任多個國際大會的分會主席等。在國際期刊和國際重要會議上發(fā)表文章80余篇。
報告摘要
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.
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