title: Optical trapping and manipulation of metallic micro/nanoparticles via photorefractive crystals.
abstract: A simple method to trap and manipulate metallic micro/nano-particles on the surface of photorefractive crystals is proposed. After inducing inhomogeneous charge density and space-charge fields in photorefractive crystals by non-uniform illumination, both uncharged and charged metallic particles can be trapped on the illuminated surface due to dielectrophoretic force and electrophoretic force, respectively. A transition from dielectrophoresis to electrophoresis is observed when manipulating nano-silver particles with high surface space-charge field. Our results show that this method is simple and effective to form surface microstructures of metallic particles.
authors.affiliation: MOE Key Laboratory of Weak-Light Nonlinear Photonics, TEDA Applied Physics School and Institute of Physics, Nankai University, Tianjin, China.
authors.forename: Xinzheng
authors.initials: X
authors.lastname: Zhang
authors.forename: Junqiao
authors.initials: J
authors.lastname: Wang
authors.forename: Baiquan
authors.initials: B
authors.lastname: Tang
authors.forename: Xinhui
authors.initials: X
authors.lastname: Tan
authors.forename: Romano A
authors.initials: RA
authors.lastname: Rupp
authors.forename: Leiting
authors.initials: L
authors.lastname: Pan
authors.forename: Yongfa
authors.initials: Y
authors.lastname: Kong
authors.forename: Qian
authors.initials: Q
authors.lastname: Sun
authors.forename: Jingjun
authors.initials: J
authors.lastname: Xu
mesh_terms: D003460:Crystallization / Q000379:methods*; D008027:Light; D008670:Metals / Q000737:chemistry* / Q000528:radiation effects; D008846:Micromanipulation / Q000379:methods*; D009038:Motion; D053758:Nanoparticles / Q000737:chemistry* / Q000528:radiation effects; D036103:Nanotechnology / Q000379:methods*; D052898:Optical Tweezers; D010777:Photochemistry / Q000379:methods; D013499:Surface Properties
chemical_list: D008670:Metals