國立清華大學動力機械工程學系

Department of Power Mechanical Engineering, NTHU

專題演講/ Seminar

LED-Based Optical Sensing Systems and Inkjet-Printed Sensors

Dr. Jin Woo Choi

Electrical and Computer Engineering, Louisiana State University,

 Baton Rouge, Louisiana, USA.

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.  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.  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.

LED-based optical sensing systems including a portable fluorescent sensing platform and a wearable biometric sensing device.  Specifically, two targets will be discussed: one is to simultaneously and selectively detect microalgae and co-culture bacteria using LEDs as excitation lights and the other is to measure saturated oxygen level in blood using reflectance-type photoplethysmography.  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.  Finally, the speaker will conclude the presentation with other on-going research activities at Louisiana State University.

Brief Biography of Dr. Jin-Woo Choi: 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.

Friday, 2018.9.07  14:00-15:30,

國立清華大學工程一館302室/ R302, Eng. Bldg. I, NTHU

主持人：動機系 洪健中教授

Host: (PME) Prof. Chien-Chong Hong

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