Acoustofluidic actuation of in situ fabricated microrotors

Murat Kaynak, Adem Ozcelik, Nitesh Nama, Amir Nourhani, Paul E. Lammert, Vincent H. Crespi, Tony Jun Huang

Research output: Contribution to journalArticlepeer-review

50 Scopus citations


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).

Original languageEnglish (US)
Pages (from-to)3532-3537
Number of pages6
JournalLab on a Chip
Issue number18
StatePublished - 2016

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Biochemistry
  • General Chemistry
  • Biomedical Engineering


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