时间：97年11月11日（二）13：30～15：20 地点：交通大学光复校区工程五馆 主讲者：Dr. Ming C. Wu (吴明强博士), Co-Director of BSAC, UC Berkeley 讲题：Optofluidics and Optoelectronic Tweezers 摘要： Optoelectronic tweezers (OET) is a new optical manipulation technique developed recently at UC Berkeley. Based on light-induced dielectrophoresis, OET can trap and sort colloidal particles and biological cells. It requires 100,000 times less optical power than conventional laser tweezers. As a result, we can use digital light projects to form massively parallel dynamic traps. As many as 31,000 individually addressable traps have been generated over an area of ~ 1 mm x 1 mm. Recently, we have succeeded in trapping semiconductor and metallic nanowires (~ 100 nm diameter, a few micron in length) and gold nanoparticles (90 nm diameter). Once trapped, we can use the same optical beam to excite and measure the Raman spectra of the trapped nanoparticles. Potentially, we can also use trapped nanowire as a SERS probe for in situ Raman characterization. Dynamic manipulation and sorting of biological cells using phototransistor-based OET will also be discussed. 吴明强博士简历： Ming C. Wu is Professor of Electrical Engineering and Computer Sciences, and Co-Director of Berkeley Sensor and Actuator Center (BSAC) at the University of California, Berkeley. He is also Chief Scientist of CITRIS, and Director of Berkeley Microfabrication Laboratory. Dr. Wu received his B.S. degree in Electrical Engineering from National Taiwan University, and M.S. and Ph.D. degrees in Electrical Engineering and Computer Sciences from the University of California, Berkeley in 1985 and 1988, respectively. From 1988 to 1992, he was a Member of Technical Staff at AT&T Bell Laboratories, Murray Hill, New Jersey. From 1992 to 2004, he was a professor in the Electrical Engineering department at the University of California, Los Angeles (UCLA). He has been a faculty member at Berkeley since 2004. His research interests include MEMS (micro-electro-mechanical systems), MOEMS, semiconductor optoelectronics, nanophotonics, and biophotonics. He has published 7 book chapters, over 155 journal papers and 300 conference papers. He is the holder of 19 U.S. patents. Prof. Wu is a Fellow of IEEE, and a member of Optical Society of America. He was a Packard Foundation Fellow from 1992 to 1997. He received the 2007 Paul F. Forman Engineering Excellence Award from Optical Society of America. --

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