Cherry A. Murray

Harvard University

Election Year: 1999
Primary Section: 33, Applied Physical Sciences
Secondary Section: 31, Engineering Sciences
Membership Type: Member

Research Interests

My research interests have been in surface, condensed matter and complex fluid physics, with emphasis on light scattering and imaging. Spacer experiments in ultrahigh vacuum and in thin film structures proved the long distance nature of electromagnetic dipole enhancement in surface enhanced Raman scattering. By digital analysis of Bitter decorations of the flux lattice of high temperature oxide superconductors at low fields my group studied vortex phases and discovered a hexatic vortex glass. My colleagues and I provided an experimental confirmation of the structure of Si4, Si6, and Si7 by the first measurement of the Raman spectrum of monodisperse clusters isolated at low concentrations in cryogenic matrices. Recently I have been using time resolved digital imaging of monodisperse submicron colloidal spheres as a model system for studying fundamental problems in condensed matter physics such as phase transitions and the structure of fluids and disordered solids. We were able to observe a two stage melting transition in a two-dimensional suspension of colloidal spheres, through a hexatic phase. Current research topics include the manufacture of new optical materials by assisted self-assembly of crystalline phases in a colloidal suspension and the structure and dynamics of a system of colloidal spheres undergoing a fluid-glass transition.

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