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Exploring Ion and Molecular Transport in Nanoscale Confined Liquids: Fundamentals and Applications
Chuanhua Duan , Assistant Professor, Boston University
These various intermolecular forces in liquids significantly affect ion and molecular transport at the nanoscale and lead to a variety of new applications in bio- and energy-related fields. In this talk, I will first introduce the surface-charge-governed ion transport due to the electrostatic force in nanochannels/nanotubes and present a new biosensing application based on this unique nanofluidic transport phenomenon. Then I will discuss two of our recent works that explore effects of hydration force on ion and water transport through hydrophilic silica nanochannels. Finally, the effect of van der Waals force on liquid/vapor interface and the corresponding enhanced capillary evaporation in nanoscale confinements will be covered. Potential applications will also be discussed.
Bio: Dr. Chuanhua Duan earned his Ph.D. degree (2009) in Mechanical Engineering from University of California at Berkeley, and he is currently an assistant professor in the Department of Mechanical Engineering at BU from 2012. His research focuses on the study of micro- and nanofluidic transport phenomena and the development of new fluidic devices/approaches for applications in healthcare, energy systems, and bioanalysis.
新型分离膜的构筑及性能研究
彭新生教授, 浙江大学
本报告主要汇报三类新型的纳米尺度分离膜方面的一些研究工作，主要包括(1)纳米纤维材料构筑的超快蛋白质及内金刚石超薄分离膜；(2)二维层状材料分离膜的构筑、分离特性及物质的传输机理等的；(3)基于金属氢氧化物纳米线的金属有机框架物分离膜的绿色制备及其功能化。
简历：彭新生2003年博士毕业于中科院固体物理所， 随后在加拿大、日本工作近7年，于2010年到浙江大学任教授，先后获“教育部新世纪优秀人才计划”， ，浙江省高层次人才引进计划”， ，浙江省杰出青年基金”。已在Science、Nat. Mater.、 Nat. Nanotech.、 Nat. Commun.、 等刊物发表论文110余篇。主要从事功能薄膜的构筑及分离应用，以及纳米空间的界面传输机理等的研究。
Application of Graphene-based Materials in Phase-change Heat Transfer Devices
Yew Mun Hung, Senior Lecturer, Monash University Malaysia
Heat dissipation is a big challenge in microelectronics field. And extensive studies have been conducted to enhance the phase-change heat transfer via surface functionalization. In this study, the performance of two-phase closed thermosyphon (TPCT) is investigated by coating graphene-nanoplatelet layers on its inner wall surface. Filmwise evaporation rate is enhanced up to twofold. In a separate study, we analyze the dynamic of a droplet evaporating on a graphene-oxide coated surface under various boiling regimes. Rapid transition of boiling regimes from film boiling to contact boiling of a droplet evaporating on GO coated surface can be observed.
Bio: Dr. Yew Mun Hung earned his Ph.D. degree (2010) in Mechanical Engineering from Multimedia University, Malaysia, and he is currently a Senior Lecturer in the School of Engineering, Monash University. His research focuses on microscale heat transfer for electronics cooling, spray cooling, microfluidics and two-phase flow in heat exchanger.
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