Time:14:30-16:30, Sep. 6th (Wednesday), 2017
Venue: 401 Academic Report Hall, Building of Information, East Campus
Topic: Diatom Photonic Crystal Biosensors
Lecturer: Xiaolong Wang, Oregon State University
About the Lecturer: Wang obtained his Bachelor’s Degree in Materials Science and Technology from Tsinghua University in 2003, Master’s Degree in Solid-state Electronics from Institute of Semiconductors, Chinese Academy of Sciences in 2003, and Doctoral Degree in Electrical and Computer Engineering from the University of Texas at Austin. Dr. Wang worked for Omega Optics from 2007 to 2011. He has been a tenured Associate Professor at Oregon State University since Sep. 2011.
His research on micro photonic devices for optical communications and optical sensing is sponsored by American Natural Science Foundation, the Health Department, Air Force Science Office, Oregon State Government and the Department of Energy, and Hewlett-Packard Co. Dr. Wang, as the first author or corresponding author, has published over 70 papers on Nanoscale, Sensors & Actuators:B. Chemical, Biophotonics, Optical Express, Applied Physical Letters, and other top international journals; and held many patents. He is also a senior member of OSA and SPIE. So far, he has given over 80 academic reports, including 12 invited ones.
Abstract: Photonic crystals can manipulate light in unique manners and have played increasingly important roles as optical biosensors. Diatoms are microalgae found in every habitat where water is present. Their abundance and wide distribution make them ideal materials for a wide range of applications as living photonic crystals.
In this seminar, he will discuss the use of diatom photonic crystals with plasmonic nanoparticles as ultra-sensitive, low-cost substrates for surface-enhanced Raman scattering (SERS) sensing. Our research shows that such hybrid plasmonic-photonic crystal nanostructures can improve the SERS detection limit by 100× for immuno-assay biosensing.
He will also discuss the recently found microscopic fluidic flow induced by the evaporation of liquid droplet on diatom photonic crystals. At last, he will present a facile method for instant on-site separation and detection of analytes by thin layer chromatography (TLC) in tandem with SERS spectroscopy using high density diatomite thin film. The research suggests that such cost-effective, multi-functional photonic crystal biosensors enabled by diatom biosilica may open a new route for lab-on-chip systems and possess significant engineering potentials for chemical and biological sensing.
School of Information Science and Engineering
Sep. 4th, 2017