Measuring storage and loss moduli using optical tweezers: broadband microrheology

Tassieri, M. , Gibson, G., Evans, R.M.L., Yao, A.M., Warren, R., Padgett, M.J. and Cooper, J.M. (2010) Measuring storage and loss moduli using optical tweezers: broadband microrheology. Physical Review E, 81(2), 026308. (doi:10.1103/PhysRevE.81.026308)

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Abstract

We present an experimental procedure to perform broadband microrheological measurements with optical tweezers. A generalized Langevin equation is adopted to relate the time-dependent trajectory of a particle in an imposed flow to the frequency-dependent moduli of the complex fluid. This procedure allows us to measure the material linear viscoelastic properties across the widest frequency range achievable with optical tweezers.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Gibson, Dr Graham and Warren, Ms Rebecca and Padgett, Professor Miles and Tassieri, Dr Manlio and Cooper, Professor Jonathan and Yao, Dr Alison
Authors: Tassieri, M., Gibson, G., Evans, R.M.L., Yao, A.M., Warren, R., Padgett, M.J., and Cooper, J.M.
Subjects:T Technology > TK Electrical engineering. Electronics Nuclear engineering
College/School:College of Science and Engineering > School of Physics and Astronomy
College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
College of Science and Engineering > School of Engineering > Biomedical Engineering
Journal Name:Physical Review E
ISSN:1539-3755
ISSN (Online):1550-2376
Published Online:18 February 2010

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