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Issue 18, 2016
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Acoustofluidic actuation of in situ fabricated microrotors

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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).

Graphical abstract: Acoustofluidic actuation of in situ fabricated microrotors

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Publication details

The article was received on 03 Apr 2016, accepted on 18 Jul 2016 and first published on 28 Jul 2016


Article type: Paper
DOI: 10.1039/C6LC00443A
Lab Chip, 2016,16, 3532-3537

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    Acoustofluidic actuation of in situ fabricated microrotors

    M. Kaynak, A. Ozcelik, N. Nama, A. Nourhani, P. E. Lammert, V. H. Crespi and T. J. Huang, Lab Chip, 2016, 16, 3532
    DOI: 10.1039/C6LC00443A

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