He did his Ph.D. at UC Berkeley and was a post-doctoral fellow at Harvard prior to starting at Johns Hopkins in 2003. He is an author on 115 publications including 74 journal articles and 20 issued patents. His research has been published or highlighted in prestigious journals such as Science, Nature Nanotechnology, Nature Photonics, Nature Physics, Nature Chemistry, PNAS and press portals such as the Wall Street Journal, the New York Times, Forbes and Discover Magazine.