title: Floating electrode optoelectronic tweezers: Light-driven dielectrophoretic droplet manipulation in electrically insulating oil medium.
abstract: We report an optical actuation mechanism, floating electrode optoelectronic tweezers (FEOET). FEOET enables light-driven transport of aqueous droplets immersed in electrically insulating oil on a featureless photoconductive glass layer with direct optical images. We demonstrate that a 681 mum de-ionized water droplet immersed in corn oil medium is actuated by a 3.21 muW laser beam with an average intensity as low as 4.08 muWmm(2) at a maximum speed of 85.1 mums on a FEOET device. FEOET provides a promising platform for massively parallel droplet manipulation with optical images on low cost, silicon-coated glass. The FEOET device structure, fabrication, working principle, numerical simulations, and operational results are presented in this letter.
authors.forename: Sungyong
authors.initials: S
authors.lastname: Park
authors.forename: Chenlu
authors.initials: C
authors.lastname: Pan
authors.forename: Ting-Hsiang
authors.initials: TH
authors.lastname: Wu
authors.forename: Christoph
authors.initials: C
authors.lastname: Kloss
authors.forename: Sheraz
authors.initials: S
authors.lastname: Kalim
authors.forename: Caitlin E
authors.initials: CE
authors.lastname: Callahan
authors.forename: Michael
authors.initials: M
authors.lastname: Teitell
authors.forename: Eric P Y
authors.initials: EP
authors.lastname: Chiou