Seminar by NJ Tao

Please note time for this Seminar Presentation: 1:30 pm – 2:30 pm

Plasmonic imaging of chemical information in nano- and bio-materials

NJ Tao
Center for Biosensors and Bioelectronics
Biodesign Institute and Electrical Engineering
 Arizona State University


With the invention of various microscopes, human being has been able to extend our vision from a few tens of microns to a fraction of nm, capable of resolving a single atom. However, most microscopes image the morphology of a sample, and there is a need of capability of imaging chemical information, such as local chemical reactions. In this talk, a plasmonic imaging approach will be described. Compared to the conventional optical imaging techniques, the plasmonic-based approach can image not only the morphology, but also local chemical information taking place on fast time scale. Important benefits of this approach include fast and non-invasive electrochemical current and impedance imaging of various samples. Using the techniques, various applications, including electrochemical analysis trace chemicals, catalytic reactions of nanomaterials, molecule-membrane protein interactions in intact cells, and action potentials in single neurons have been demonstrated.


NJ Tao joined the ASU faculty as a professor of electrical engineering and an affiliated professor of chemistry and biochemistry in August 2001. Since 2008, he has been serving as the Director of the Center for Bioelectronics and Biosensors, Biodesign Institute at ASU. He has published >200 refereed journal articles, which have been cited >13,000 times (h-index: 67). He has given over 200 invited and keynote talks worldwide. His current research interest includes chemical and biological imaging and sensing technologies, molecular and nano-electronics, wireless sensors for mobile health applications. He is selected fellow of AAAS, and fellow of America Physical Society, and received various recognitions, including Alexander von Humboldt Senior Research Award, Hellmuth Fisher Medal; Microscopy Today Innovation Award, Arizona Technology Enterprise Innovator Award, and Molecular Imaging Young Microscopist.

Seminar Date