This talk will discuss two relatively new topics in carbon nanotube research. The first is nanotubes for chemical and biological sensors, an exploration motivated by the ultra high surface area of single walled carbon nanotubes and the need for label free electronic detectors for a wide range of molecules in gas and liquid environments. I will discuss the fabrication of nanosensor devices, chemical functionalization schemes for imparting selectivity and the physical mechanisms involved in the detections. The second topic is about interfacing carbon nanotubes with living systems. I will show our recent observation of carbon nanotube internalization into living cells, and nanotubes as carriers for transporting proteins inside cells. The implications of these results will be discussed.
Hongjie Dai is an Associate Professor in the Chemistry Department and Laboratory of Advanced Materials at Stanford University. He received his B.A. in Applied Physics from Tsinghua University in P. R. China, and his Ph. D. in Physical Chemistry from Harvard University. He has been at Stanford since 1997 following a postdoctoral research at Rice University. His research program interfaces with chemistry, physics and biological applications of novel nanostructured materials including carbon nanotubes and nanowires. He has developed synthesis methods to obtain various interesting carbon nanotube structures on surfaces. He has carried out fundamental electrical, mechanical and electromechanical studies of these novel nanomaterials and investigated their applications for molecular electronics and miniature chemical and biological sensors. He has received various awards including the Julius Springer Prize for Applied Physics 2004, American Chemical Society Pure Chemistry Award, a Sloan Research Fellowship, a Packard Fellowship for Science and Engineering and a Terman Fellowship.
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