title: Accumulating microparticles and direct-writing micropatterns using a continuous-wave laser-induced vapor bubble.
abstract: Through the enhanced photothermal effect, which was achieved using a silver film, a low power weakly focused continuous-wave laser (532 nm) was applied to create a vapor bubble. A convective flow was formed around the bubble. Microparticles dispersed in water were carried by the convective flow to the vapor bubble and accumulated on the silver film. By moving the laser spot, we easily manipulated the location of the bubble, allowing us to direct-write micropatterns on the silver film with accumulated particles. The reported simple controllable accumulation method can be applied to bimolecular detection, medical diagnosis, and other related biochip techniques.
authors.affiliation: National Laboratory of Solid State Microstructures & Department of Physics, Nanjing University, Nanjing, People's Republic of China.
authors.forename: Yajian
authors.initials: Y
authors.lastname: Zheng
authors.forename: Hui
authors.initials: H
authors.lastname: Liu
authors.forename: Yi
authors.initials: Y
authors.lastname: Wang
authors.forename: Cong
authors.initials: C
authors.lastname: Zhu
authors.forename: Shuming
authors.initials: S
authors.lastname: Wang
authors.forename: Jingxiao
authors.initials: J
authors.lastname: Cao
authors.forename: Shining
authors.initials: S
authors.lastname: Zhu