Title :

Manipulation of Energy and Mass Transport at Micro/Nanoscale for Engineering Applications

Speaker :

Prof. Deyu Li

Department of Mechanical Engineering

Vanderbilt University, USA

Venue :

Room 215, William M. W. Mong Engineering Building, CUHK

Date :

Dec 19, 2011, Monday
11:00 AM - 12:00 PM

Abstract :

Micro/Nanoscale energy and mass transport attracts much attention over the past decade because it involves rich physics and has extensive applications. In this talk, I will discuss some research on manipulating energy and mass transport at micro/nanoscale and some related applications.

In the first half of the talk I will present some of the results we obtained on energy transport through individual nanostructures and their contacts. More specifically, I will show how van der Waals interfaces between individual nanostructures modulate energy transport. We show that energy carriers (phonons) can effectively transmit through van der Waals interfaces without being diffusely scattered, which is different from the traditional view of energy transport through van der Waals interfaces between two solids. Better understanding of these phenomena could lead to better design of nanocomposite materials with tunable thermal and electrical properties and better thermal management of micro/optoelectronic devices.

In the second half of the talk, I will present one microfluidic device that involves manipulation of mass transport. The device is a valve-enabled cell co-culture platform, which could modulate interactions between different cell populations. Based on this device, we have successfully observed the dynamics of synapse formation in central nervous systems and dissected the function of specific molecules in tumor angiogenesis and metastasis.

Biography :

Dr. Deyu Li received his B.S., M.E., and Ph.D. degrees from the University of Science and Technology of China, Tsinghua University, and the University of California, Berkeley, respectively. He joined Vanderbilt University in 2004 as an assistant professor in the Department of Mechanical Engineering and was promoted to an associate professor in 2010. His research interests include Nanoscale thermal transport and microfluidics and nanofluidics. He has published 44 journal papers, which has been cited for more than 2000 times. He received the NSF career award in 2007.

    **************************************** ALL ARE WELCOME ****************************************

Enquiries: Ms. Winnie Wong, Department of Mechanical and Automation Engineering, CUHK at 2609 8337. *MAE Series (2011-12) is contained in the World-Wide Web home page at http://www3.mae.cuhk.edu.hk/maeseminars.php#mae.