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Holographic characterization of imperfect colloidal spheres
Mark Hannel, Christine Middleton, David G. Grier
We demonstrate precise measurements of the size and refractive index of individual dimpled colloidal spheres using holographic characterization techniques developed for ideal spher…
Stimulus-responsive colloidal sensors with fast holographic readout
Chen Wang, Henrique W. Moyses, David G. Grier
Colloidal spheres synthesized from polymer gels swell by absorbing molecules from solution. The resulting change in size can be monitored with nanometer precision using holographic…
Motion Induced by Light: Photokinetic Effects in the Rayleigh Limit
David B. Ruffner, Aaron Yevick, David G. Grier
Structured beams of light can move small objects in surprising ways. Particularly striking examples include observations of polarization-dependent forces acting on optically isotro…
A perturbative theory for Brownian vortexes
Henrique W. Moyses, Ross O. Bauer, Alexander Y. Grosberg +1
Brownian vortexes are stochastic machines that use static non-conservative force fields to bias random thermal fluctuations into steadily circulating currents. The archetype for th…