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Devendran C, Collins DJ, Ai Y, et al. Huygens-Fresnel Acoustic Interference and the Development of Robust Time-Averaged Patterns from Traveling Surface Acoustic Waves. Phys Rev Lett. 2017;118(15):154501doi: 10.1103/PhysRevLett.118.154501.
Devendran, C., Collins, D. J., Ai, Y., & Neild, A. (2017). Huygens-Fresnel Acoustic Interference and the Development of Robust Time-Averaged Patterns from Traveling Surface Acoustic Waves. Physical review letters, 118(15), 154501. https://doi.org/10.1103/PhysRevLett.118.154501
Devendran, Citsabehsan, et al. "Huygens-Fresnel Acoustic Interference and the Development of Robust Time-Averaged Patterns from Traveling Surface Acoustic Waves." Physical review letters vol. 118,15 (2017): 154501. doi: https://doi.org/10.1103/PhysRevLett.118.154501
Devendran C, Collins DJ, Ai Y, Neild A. Huygens-Fresnel Acoustic Interference and the Development of Robust Time-Averaged Patterns from Traveling Surface Acoustic Waves. Phys Rev Lett. 2017 Apr 14;118(15):154501. doi: 10.1103/PhysRevLett.118.154501. Epub 2017 Apr 12. PMID: 28452526.
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Phys Rev Lett. 2017 Apr 14;118(15):154501. doi: 10.1103/PhysRevLett.118.154501. Epub 2017 Apr 12.

Huygens-Fresnel Acoustic Interference and the Development of Robust Time-Averaged Patterns from Traveling Surface Acoustic Waves.

Physical review letters

Citsabehsan Devendran, David J Collins, Ye Ai, Adrian Neild

Affiliations

  1. Laboratory for Micro Systems, Department of Mechanical and Aerospace Engineering, Monash University, Melbourne 3800, Victoria, Australia.
  2. Pillar of Engineering Product Development, Singapore University of Technology and Design, Singapore 487372, Singapore.

PMID: 28452526 DOI: 10.1103/PhysRevLett.118.154501

Abstract

Periodic pattern generation using time-averaged acoustic forces conventionally requires the intersection of counterpropagating wave fields, where suspended micro-objects in a microfluidic system collect along force potential minimizing nodal or antinodal lines. Whereas this effect typically requires either multiple transducer elements or whole channel resonance, we report the generation of scalable periodic patterning positions without either of these conditions. A single propagating surface acoustic wave interacts with the proximal channel wall to produce a knife-edge effect according to the Huygens-Fresnel principle, where these cylindrically propagating waves interfere with classical wave fronts emanating from the substrate. We simulate these conditions and describe a model that accurately predicts the lateral spacing of these positions in a robust and novel approach to acoustic patterning.

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