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职称:Associate Professor
所属学校:Georgetown University
所属院系:Department of Physics
所属专业:Physics, General
联系方式:(202) 687-5982
Edward Van Keuren is an Associate Professor in the Department of Physics at Georgetown University. After obtaining a Ph.D. in Physics from Carnegie Mellon University in 1990, Prof. Van Keuren worked for the German chemical company, BASF AG, in Germany and Japan, and also spent several years at the Japanese National Institute of Materials and Chemical Research. He has over 75 publications in peer reviewed journals, and his work has been recognized by a National Science Foundation Faculty Early Career Development Award, an Oak Ridge Associated Universities Ralph E. Powe Junior Faculty Enhancement Award and a Georgetown University Teaching and Learning with Technology fellowship. He is a member of the American Physical Society, American Chemical Society and SPIE. He joined Georgetown in 1999 and from 2007-2013, he was Chair of the Georgetown Physics Department. His work at BASF encompassed the development and characterization of novel optical switching materials, in particular those based on organic nanoparticles. He also developed a number of fiber optic light scattering methods for determining particle size in concentrated dispersions. Since coming to Georgetown, his research has been concerned with the preparation and application of nanoparticles. His research focus is on both applying novel optical characterization methods to measure the initial nucleation and self-assembly of organic nanoparticles in solution as well as the development of new nanoparticle materials for applications such as MRI contrast enhancement.
Synthesis and optical characterization of nanoparticles We are studying the nucleation and growth of organic nanoparticles. We typically use precipitation methods to induce a high level of supersaturation in a solution and observe the formation of nanoparticles using a number of methods, including dynamic light scattering, absorption, fluorescence and Raman spectroscopy and electron microscopy. These observations are used to develop and refine models of molecular self-assembly/self-organization. Development of characterization techniques We are working on several new methods for characterizing molecular diffusion and self-assembly, including spectrally selective fluorescence correlation spectroscopy and Raman correlation spectroscopy. With the latter, we will be able to characterize diffusion of specific components of a complex mixture. Application of nanomaterials We are working on two areas of application of nanomaterials. One is the development of new materials for organic photovoltaic devices The other is in the development of nanoparticles for cancer imaging and therapy.
