Optical trapping and manipulation of metallic micro/nanoparticles via photorefractive crystals.
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.
Zhang
Xinzheng
X
MOE Key Laboratory of Weak-Light Nonlinear Photonics, TEDA Applied Physics School and Institute of Physics, Nankai University, Tianjin, China.
Wang
Junqiao
J
Tang
Baiquan
B
Tan
Xinhui
X
Rupp
Romano A
RA
Pan
Leiting
L
Kong
Yongfa
Y
Sun
Qian
Q
Xu
Jingjun
J
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
D008670:Metals