时间：2018年12月12日周三上午9:30
地点：遗传楼308会议室
演讲人：Prof. Jin-Woo Choi, Louisiana State University
联系人：陆冰睿

欢迎感兴趣的老师和同学参加

Abstract

Light emitting diodes (LEDs) are of interest in a variety of wearable and portable sensing applications due to wide availability and ease of integration with control and signal processing electronics.  An LED-based optical sensing system can be a viable option for on-site and field-deployable sensing as it can be built in a small form factor while providing limited but decent analytical capabilities comparable to its benchtop counterpart.  Specifically, a portable fluorescent sensing platform is to selectively measure concentrations of two different species (microalgae and cyanobacteria) from environmental samples.

In addition, nanomaterials including conductive polymer nanowires and carbon nanotubes have recently been widely used in various sensors applications utilizing their unique properties.  Printing also becomes an emerging manufacturing technology for mechanics, electronics, sensors, and consumer products.  Printed electrodes and conductive traces particularly offer versatility of fabricating cost-effective, disposable, and flexible devices.  Printing-based rapid and on-demand fabrication enables inexpensive electrochemical and chemiresistive sensors on flexible substrates.  Materials preparation, sensor development, and characterization will be covered and discussed.

This presentation will cover the speaker’s recent developments emphasizing application aspects of i) an LED-based portable fluorescent sensing system and ii) printed carbon nanotubes and conductive polymer nanowires for chemical and biomedical sensing applications.  Finally, the speaker will conclude the presentation with other on-going research activities at Louisiana State University.

Biosketch

Dr. Jin-Woo Choi is currently Professor of Electrical and Computer Engineering at Louisiana State University, Baton Rouge, Louisiana, USA.  He received his B.S. and M.S. degrees in Electrical Engineering from Seoul National University and Ph.D. degree in Electrical Engineering from the University of Cincinnati.  His research expertise lies in the area of nano/microfabrication, microscale devices and systems, biomedical microsystems, and biosensors.  Dr. Choi has been conducting research on point-of-care diagnostic devices, lab-on-a-chip, polymer-based transducers, printing nanomaterials, and nanomaterial-based sensors in a variety of sensing applications.  He has published more than 100 papers in journals and conference proceedings.  He is an editor of Microelectronic Engineering, an Elsevier journal dedicated to nanotechnology and processing for electronics, MEMS, energy, and life sciences.