He, together with his group members, has been studying the physical properties of carbon nanotubes (CNTs), diamond-like carbon films and CVD diamond and developing a variety of devices based on these carbon materials, including CNT based diodes, CNT nitrophenol/NH3/glucose sensors; complementary CNT-network logic gates, heat transport in CNTs, influence of dichlorocarbene functionalzation on the electrical properties of CNTs, the formation mechanism of diamond-like carbon thin films, etc. He has jointly published 202 peer reviewed journal papers and 170 conference papers/presentations. He has successfully organized and chaired the Symposium of Nanodevices and Nanofabrication in 2011, 2009, 2007 and 2005, respectively, for the International Conference on Materials for Advanced Technologies.