Levich Institute Seminar Announcement, 11/02/2010
Steinman Hall, Room #312
(Chemical Engineering Conference Room)
Professor Daniel Ou-Yang
Department of Physics
"Ensemble Behavior of Nanoparticles in Optical Confinement"
A novel method, optical bottles, will be described for analysis of the collective behavior of nanoparticles in optical confinement at the focus of a laser beam. Consideration of the mechanical force balance between repulsive osmotic and confining gradient-force pressures yields the single-particle trapping potential and the interactions between the particles. The ensemble nature of the measurement permits determination of single-particle trapping energies much smaller than /k_B T/. The ability to imaging the nanoparticle ensembles in 3-D also provides a means to map the optical field in space.
BRIEF ACADEMIC/EMPLOYMENT HISTORY
RECENT RESEARCH INTERESTS:
Soft matter, colloids and biological physics