title: Acoustofluidic actuation of in situ fabricated microrotors.
abstract: We have demonstrated in situ fabricated and acoustically actuated microrotors. A polymeric microrotor with predefined oscillating sharp-edge structures is fabricated in situ by applying a patterned UV light to polymerize a photocrosslinkable polyethylene glycol solution inside a microchannel around a polydimethylsiloxane axle. To actuate the microrotors by oscillating the sharp-edge structures, we employed piezoelectric transducers which generate tunable acoustic waves. The resulting acoustic streaming flows rotate the microrotors. The rotation rate is tuned by controlling the peak-to-peak voltage applied to the transducer. A 6-arm microrotor can exceed 1200 revolutions per minute. Our technique is an integration of single-step microfabrication, instant assembly around the axle, and easy acoustic actuation for various applications in microfluidics and microelectromechanical systems (MEMS).
authors.affiliation: Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802, USA. junhuang@psu.edu.
authors.forename: Murat
authors.initials: M
authors.lastname: Kaynak
authors.forename: Adem
authors.initials: A
authors.lastname: Ozcelik
authors.forename: Nitesh
authors.initials: N
authors.lastname: Nama
authors.forename: Amir
authors.initials: A
authors.lastname: Nourhani
authors.forename: Paul E
authors.initials: PE
authors.lastname: Lammert
authors.forename: Vincent H
authors.initials: VH
authors.lastname: Crespi
authors.forename: Tony Jun
authors.initials: TJ
authors.lastname: Huang
mesh_terms: D000162:Acoustics; D056656:Lab-On-A-Chip Devices; D012399:Rotation