title: Large dielectrophoresis force and torque induced by localized surface plasmon resonance of Au nanoparticle array.
abstract: A new approach is proposed for manipulating and rotating micro- or nano-objects by using polarized laser light with low intensity. The polarized light excites resonant dipoles on a cap-shaped Au nanoparticle array, which generates a highly nonuniform radiation field that induces large dielectrophoresis force on dielectric objects. The orientation control of the objects is realized by adjusting the polarization direction of the incident light. Theoretical modeling, fabrication, and characterization results for the cap-shaped Au nanoparticle array, as well as preliminary trapping results, are reported.
authors.affiliation: Electrical Engineering Department, University of Washington, Seattle 98195, USA. xiaoyu@ee.washington.edu
authors.forename: Xiaoyu
authors.initials: X
authors.lastname: Miao
authors.forename: Lih Y
authors.initials: LY
authors.lastname: Lin
mesh_terms: D002469:Cell Separation / Q000295:instrumentation / Q000379:methods*; D004586:Electrophoresis / Q000295:instrumentation / Q000379:methods*; D006046:Gold / Q000737:chemistry*; D007834:Lasers; D008846:Micromanipulation / Q000295:instrumentation / Q000379:methods*; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D013314:Stress, Mechanical; D020349:Surface Plasmon Resonance / Q000295:instrumentation / Q000379:methods*; D019415:Torque
chemical_list: D006046:Gold