Morphing Surfaces Enable Acoustophoretic Contactless Transport of Ultrahigh-Density Matter in Air
Open Access
- 11 November 2013
- journal article
- Published by Springer Science and Business Media LLC in Scientific Reports
- Vol. 3 (1), 3176
- https://doi.org/10.1038/srep03176
Abstract
The controlled contactless transport of heavy drops and particles in air is of fundamental interest and has significant application potential. Acoustic forces do not rely on special material properties, but their utility in transporting heavy matter in air has been restricted by low power and poor controllability. Here we present a new concept of acoustophoresis, based on the morphing of a deformable reflector, which exploits the low reaction forces and low relaxation time of a liquid with enhanced surface tension through the use of thin overlaid membrane. An acoustically induced, mobile deformation (dimple) on the reflector surface enhances the acoustic field emitted by a line of discretized emitters and enables the countinuos motion of heavy levitated samples. With such interplay of emitters and reflecting soft-structure, a 5 mm steel sphere (0.5 grams) was contactlessly transported in air solely by acoustophoresis.This publication has 31 references indexed in Scilit:
- On the acoustic levitation stability behaviour of spherical and ellipsoidal particlesJournal of Fluid Mechanics, 2012
- On-chip manipulation of single microparticles, cells, and organisms using surface acoustic wavesProceedings of the National Academy of Sciences of the United States of America, 2012
- Templated self-assembly in three dimensions using magnetic levitationSoft Matter, 2011
- Label-free cellular manipulation and sorting via biocompatible ferrofluidsProceedings of the National Academy of Sciences of the United States of America, 2009
- Robust omniphobic surfacesProceedings of the National Academy of Sciences of the United States of America, 2008
- Nanostructures for superhydrophobicity and low adhesionSoft Matter, 2008
- Laser trapping in anisotropic fluids and polarization-controlled particle dynamicsProceedings of the National Academy of Sciences of the United States of America, 2006
- Relaxation Time Spectrum of Hydrogels by CONTIN AnalysisJournal of Food Science, 2000
- Control of a Standing Wave Field Using a Line-Focused Transducer for Two-Dimensional Manipulation of ParticlesJapanese Journal of Applied Physics, 1998
- Flow of Red Blood Cells stopped by UltrasoundNature, 1971