My research is aimed at understanding the structure and properties of proteins, lyotropic liquid crystals, block co-polymers and mesoporous composites.  Examples include the effects of pressure on protein assemblies, the synthesis and properties of polymer-based nanocomposites, the interaction between membrane proteins and lipid bilayers, and techniques to determine protein structure from microcrystals. The work is diverse and is characterized by collaborations with biologically- and chemically-oriented scientists, the development of new instrumentation and techniques, especially as involves x-rays and synchrotron radiation. I also believe that physicists are tool makers and, in consequence,  everyone in the group is involved in instrumentation and technique development as applied to the materials listed, above. 

• Professor, Physics, Cornell University, 1997-present
• Fellow, American Physical Society
• Fellow, American Association for the Advancement of Science
• Member, American Academy of Arts and Sciences
• Director, Cornell High Energy Synchrotron Source (CHESS), Cornell University, 1997-2013
• Visiting appointments at Exxon Research, Research Engineering; Institute for Theoretical Physics, U.C. Santa Barbara; Robert Wood Johnson Medical School, Dept. of Pathology
• Professor, Physics, Princeton University, 1991-97
• Associate Professor, Physics, Princeton University, 1985-91
• Assistant Professor, Physics, Princeton University, 1978-85
• Research Associate, Princeton University, 1977
• Ph.D. in Physics, Princeton University, 1977
• S.B., Massachusetts Institute of Technology, 1972