title: Optical gradient flow focusing.
abstract: This paper describes a new method for carrying out flow cytometry, which employs optical gradient forces to guide and focus particles in the fluid flow. An elliptically shaped Gaussian beam was focused at the center of a microchannel to exert radiation pressure on suspended nanoparticles that are passing through the channel, such that these particles are guided to the center of the channel for efficient detection and sorting. To verify the efficiency of this optical-gradient-flow-focusing method, we present numerical simulations of the trajectories of the nanoparticles in both electroosmotic flow (EOF) and pressure-driven flow (PDF).
authors: Department of Chemistry, University of Washington, Seattle, WA 98195-1700, USA.
authors: Yiqiong
authors: Y
authors: Zhao
authors: Bryant S
authors: BS
authors: Fujimoto
authors: Gavin D
authors: GD
authors: Jeffries
authors: Perry G
authors: PG
authors: Schiro
authors: Daniel T
authors: DT
authors: Chiu