Digital holography as 3D tracking tool for assessing acoustophoretic particle manipulation

Cacace, T., Paturzo, M., Memmolo, P., Vassalli, M. , Ferraro, P., Fraldi, M. and Mensitieri, G. (2017) Digital holography as 3D tracking tool for assessing acoustophoretic particle manipulation. Optics Express, 25(15), pp. 17746-17752. (doi:10.1364/OE.25.017746) (PMID:28789266)

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Abstract

The integration of digital holography (DH) imaging and the acoustic manipulation of micro-particles in a microfluidic environment is investigated. The ability of DH to provide efficient 3D tracking of particles inside a microfluidic channel is exploited to measure the position of multiple objects moving under the effect of stationary ultrasound pressure fields. The axial displacement provides a direct verification of the numerically computed positions of the standing wave’s node, while the particles’ transversal movement highlights the presence of nodes in the planar direction. Moreover, DH is used to follow the aggregation dynamics of trapped spheres in such nodes by using aggregation rate metrics.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Vassalli, Dr Massimo
Authors: Cacace, T., Paturzo, M., Memmolo, P., Vassalli, M., Ferraro, P., Fraldi, M., and Mensitieri, G.
College/School:College of Science and Engineering > School of Engineering > Biomedical Engineering
Journal Name:Optics Express
Publisher:Optical Society of America
ISSN:1094-4087
ISSN (Online):1094-4087
Published Online:14 July 2017
Copyright Holders:Copyright © 2017 Optical Society of America
First Published:First published in Optics Express
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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