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2011年秋季先进机器人与MEMS技术系列学术讲座（40）
添加日期：2011-09-22 作者：宋洪生老师 来源：
2011年秋季先进机器人与MEMS技术系列学术讲座（40）
南开大学机器人与信息自动化研究所 Institute of Robotics and Automatic Information System 2011年秋季先进机器人与MEMS技术系列学术讲座 Seminar Series：Advanced Robotics & MEMS 题目：Surface Tension Is a Fair Game in Micro-Engineering: Play It! 地点：主楼227室 时间：9月21日（周三）下午3：00~5:00； 报告人：Professor. Chang-Jin “CJ” Kim. （Micro- and Nano-Manufacturing Lab; California NanoSystems Institute Mechanical and Aerospace Engineering Department University of California, Los Angeles (UCLA), California, U.S.A.） 讲座摘要： Unlike in regular scale where containers and pipes are needed to manipulate fluids, in microscale liquids and gases can be handled as discrete objects using the liquid-gas interface as the virtual walls. This new option is a consequence of surface tension dominating other mechanical forces in microscale. Presented will be a series of engineering applications, where the main design concepts are based on such unique microscale effects. The application examples include superhydrophobic surfaces for drag reduction; satellite-free inkjet printing; micro RF switches using liquid-metal droplets; and active micro fuel cell without a pump. Furthermore, droplets can be actively and individually manipulated by voltages, which opened a new field of digital microfluidics. One goal is to establish a lab-on-a-chip platform based on the microactuation mechanism of electrowetting-on-dielectric (EWOD). Demonstrated to manipulate mostly aqueous droplets in air, EWOD-based microfluidics has accomplished many manipulative functions (e.g., creating and moving droplets, mixing different droplets, separating particles in a droplet, generating precise droplet volumes on chip) and demonstrated several applications (e.g., sample preparation for MALDI-MS, radiosynthesis of tracers for PET scan). To demonstrate the simplicity that EWOD microfluidics allows for system development, we showcase a stand-alone handheld prototype system complete with a battery pack. With the ability to create EWOD chips capable of manipulating multiple droplets on a two-dimensional grid array and building an entire system on a printed circuit board, complete handheld lab-on-a-chip systems are on the horizon. 主讲人简历 ： Professor CJ Kim received the B.S. degree from Seoul National University, the M.S. from Iowa State University, and the Ph.D. from the University of California at Berkeley in 1991, all in mechanical engineering, and joined the faculty at UCLA in 1993. Directing the Micro and Nano Manufacturing Laboratory, his research is in MEMS and Nanotechnology, including design and fabrication of micro/nano structures, actuators and systems, with a focus on the use of surface tension. The recipient of the TRW Outstanding Young Teacher Award, NSF CAREER Award, ALA Achievement Award, and Samueli Outstanding Teacher Award, Prof. Kim has served on numerous professional and governmental committees and panels in MEMS and nanotechnology. An ASME Fellow, he is serving on the Editorial Board for the IEEE/ASME Journal of MEMS, the Editorial Advisory Board for IEEJ Transactions on Electrical and Electronic Engineering, the Technical Program Committee of the IEEE International Conference on MEMS 2012 and as General Chair on MEMS 2014. He has also been active in the commercial sector, as a board member, scientific advisor, consultant, and founder of start-ups. |