Dynamic stereo microscopy for studying particle sedimentation

Lee, M.P., Gibson, G.M., Phillips, D., Padgett, M.J. and Tassieri, M. (2014) Dynamic stereo microscopy for studying particle sedimentation. Optics Express, 22(4), pp. 4671-4677. (doi:10.1364/OE.22.004671)

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Publisher's URL: http://dx.doi.org/10.1364/OE.22.004671

Abstract

We demonstrate a new method for measuring the sedimentation of a single colloidal bead by using a combination of optical tweezers and a stereo microscope based on a spatial light modulator. We use optical tweezers to raise a micron-sized silica bead to a fixed height and then release it to observe its 3D motion while it sediments under gravity. This experimental procedure provides two independent measurements of bead diameter and a measure of Faxén’s correction, where the motion changes due to presence of the boundary.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Gibson, Dr Graham and Lee, Mr Michael and Padgett, Professor Miles and Tassieri, Dr Manlio and Phillips, Dr David
Authors: Lee, M.P., Gibson, G.M., Phillips, D., Padgett, M.J., and Tassieri, M.
College/School:College of Science and Engineering > School of Physics and Astronomy
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
Copyright Holders:Copyright © 2014 Optical Society of America
First Published:First published in Optics Express 22(4):4671-4677
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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