Title :
Trap stiffness in negative Optoelectronic Tweezers (OET)
Author :
Neale, Steven L. ; Wu, Ming C.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Univ. of California, Berkeley, CA
Abstract :
Optoelectronic tweezers (OET) allow the control of micron-sized particles suspended in a liquid by controlling the dielectrophoretic force with the selective illumination of a photoconductor. High liquid conductivities give a negative force (away from illuminated areas) so that particles are trapped by illuminating a ring around them. This paper explores the force profile of these traps and shows that high stiffness traps can be created (8times10-7 Nm-1), with a linear profile, at low optical powers (8.29 muW).
Keywords :
electrophoresis; photoconducting materials; quantum optics; radiation pressure; dielectrophoretic force; force profile; high stiffness traps; liquid conductivities; micron-sized particles; negative optoelectronic tweezers; photoconductor; power 8.29 muW; selective illumination; trap stiffness; Charge carrier processes; Conductivity; Dielectrophoresis; Drag; Force control; Force measurement; Glass; Optical sensors; Photoconductivity; Voltage; (350.4855) Optical tweezers or optical manipulation;
Conference_Titel :
Lasers and Electro-Optics, 2008 and 2008 Conference on Quantum Electronics and Laser Science. CLEO/QELS 2008. Conference on
Conference_Location :
San Jose, CA
Print_ISBN :
978-1-55752-859-9
