Mark A. Ratner (NAS) is the Morrison Professor of Chemistry and professor of materials science and engineering at Northwestern University. His research focuses on structure and function at the nanoscale and on the theory of fundamental chemical processes. Specific interests include molecular electronics, electron transfer, self-assembly, nonlinear optical response in molecules, and theories of quantum dynamics. He is a fellow of the American Association for the Advancement of Science and a member of the American Academy of Arts and Sciences. Dr. Ratner was elected to the National Academy of Sciences in 2002 for his contributions to molecular materials theory and modeling. He earned his PhD in chemistry from Northwestern University.

Justin G. Teeguarden is a senior research scientist with the Pacific Northwest National Laboratory where he conducts research within a multidisciplinary team studying the relationship between the physicochemical properties of nanomaterials and their biocompatibility. His major research focus is in the areas of nanomaterial pharmacokinetics and dosimetry, both in vivo and in vitro, and the development of integrated computational models of cellular and tissue dosimetry and biologic response. He is the principal investigator of pharmacokinetic studies of organic chemicals and metals and develops physiologically based pharmacokinetic models of chemical kinetics for application in study design and risk assessment for both private companies and the EPA. Through Society of Toxicology symposia, specialty sections and continuing education courses, Dr. Teeguarden has promoted the application of the fundamental sciences in nanomaterial risk assessment. He serves on the National Toxicology Program Board of Scientific Councilors, and on a variety of EPA and NIH review panels. Dr. Teeguarden received his PhD in toxicology from the University of Wisconsin, Madison, and is board certified in toxicology.

Mark R. Wiesner is the James L. Meriam Professor of Civil and Environmental Engineering in the Pratt School of Engineering at Duke University. He was previously Chair of Excellence in the Chemical Engineering Laboratory at the Institute Nationale Polytechnique, Toulouse, France. His research interests include membrane processes, nanostructured materials, transport and fate of nanomaterials in the environment, colloidal and interfacial processes, and environmental systems analysis. Dr. Wiesner has received the Association of Environmental Engineering and Science Professors Frontiers in Research Award, the American Institute of Chemical Engineers Graduate Research Award for Membrane-Based Separations, and the Charles Duncan Award for Scholarship and Teaching at Rice University. He served on the Scientific Advisory Board and was the U.S. director for the European Union-United States University Consortium on Environmental Engineering Education from 1993 to 2005. Dr. Wiesner received his PhD in environmental engineering from Johns Hopkins University.

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