Simultaneous measurement of the microscopic dynamics and the mesoscopic displacement field in soft systems by speckle imaging
Simultaneous measurement of the microscopic dynamics and the mesoscopic displacement field in soft systems by speckle imaging
The constituents of soft matter systems such as colloidal suspensions, emulsions, polymers, and biological tissues undergo microscopic random motion, due to thermal energy. They may also experience drift motion correlated over mesoscopic or macroscopic length scales, e.g. in response to an internal or applied stress or during flow. We present a new method for measuring simultaneously both the microscopic motion and the mesoscopic or macroscopic drift. The method is based on the analysis of spatio-temporal cross-correlation functions of speckle patterns taken in an imaging configuration. The method is tested on a translating Brownian suspension and a sheared colloidal glass.
22353-22366
Cipelletti, L.
bcb9819f-3cdb-4e4f-9bfe-9fe0ebf0e28a
Brambilla, G.
815d9712-62c7-47d1-8860-9451a363a6c8
Maccarrone, S.
86e2c56c-ae5d-43e5-9041-c7ae9e82f19a
Caroff, S.
4d8e7e9f-5f5f-4f15-8659-94aef886b9d2
23 September 2013
Cipelletti, L.
bcb9819f-3cdb-4e4f-9bfe-9fe0ebf0e28a
Brambilla, G.
815d9712-62c7-47d1-8860-9451a363a6c8
Maccarrone, S.
86e2c56c-ae5d-43e5-9041-c7ae9e82f19a
Caroff, S.
4d8e7e9f-5f5f-4f15-8659-94aef886b9d2
Cipelletti, L., Brambilla, G., Maccarrone, S. and Caroff, S.
(2013)
Simultaneous measurement of the microscopic dynamics and the mesoscopic displacement field in soft systems by speckle imaging.
Optics Express, 21 (19), .
(doi:10.1364/OE.21.022353).
Abstract
The constituents of soft matter systems such as colloidal suspensions, emulsions, polymers, and biological tissues undergo microscopic random motion, due to thermal energy. They may also experience drift motion correlated over mesoscopic or macroscopic length scales, e.g. in response to an internal or applied stress or during flow. We present a new method for measuring simultaneously both the microscopic motion and the mesoscopic or macroscopic drift. The method is based on the analysis of spatio-temporal cross-correlation functions of speckle patterns taken in an imaging configuration. The method is tested on a translating Brownian suspension and a sheared colloidal glass.
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Published date: 23 September 2013
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Local EPrints ID: 441546
URI: http://eprints.soton.ac.uk/id/eprint/441546
ISSN: 1094-4087
PURE UUID: 67be783f-d56b-4fb1-8a85-a88757cb86dc
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Date deposited: 17 Jun 2020 16:31
Last modified: 17 Mar 2024 02:53
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Author:
L. Cipelletti
Author:
S. Maccarrone
Author:
S. Caroff
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