Fluctuation-Dissipation Theorem in an Aging Colloidal Glass

by: Sara J Farouji, Daisuke Mizuno, Maryam Atakhorrami, Fred C Mackintosh, Christoph F Schmidt, Erika Eiser, Gerard H Wegdam, Daniel Bonn

Physical Review Letters, Vol. 98, No. 10. (2007)

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Abstract

We provide a direct experimental test of the fluctuation-dissipation theorem (FDT) in an aging colloidal glass. The use of combined active and passive microrheology allows us to independently measure both the correlation and response functions in this nonequilibrium situation. Contrary to previous reports, we find no deviations from the FDT over several decades in frequency (1 Hz–10 kHz) and for all aging times. In addition, we find two distinct viscoelastic contributions in the aging glass, including a nearly elastic response at low frequencies that grows during aging.

@article{citeulike:1988262, abstract = {We provide a direct experimental test of the fluctuation-dissipation theorem (FDT) in an aging colloidal glass. The use of combined active and passive microrheology allows us to independently measure both the correlation and response functions in this nonequilibrium situation. Contrary to previous reports, we find no deviations from the FDT over several decades in frequency (1\ Hz\–10\ kHz) and for all aging times. In addition, we find two distinct viscoelastic contributions in the aging glass, including a nearly elastic response at low frequencies that grows during aging.}, author = {Farouji, Sara J. and Mizuno, Daisuke and Atakhorrami, Maryam and Mackintosh, Fred C. and Schmidt, Christoph F. and Eiser, Erika and Wegdam, Gerard H. and Bonn, Daniel }, citeulike-article-id = {1988262}, doi = {10.1103/PhysRevLett.98.108302}, journal = {Physical Review Letters}, keywords = {2007, aging, colloids, experiment, glass, theory}, number = {10}, posted-at = {2008-03-19 16:16:15}, priority = {2}, publisher = {APS}, title = {Fluctuation-Dissipation Theorem in an Aging Colloidal Glass}, url = {http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal\&id=PRLTAO000098000010108302000001\&idtype=cvips\&gifs=yes}, volume = {98}, year = {2007} }

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TY - JOUR ID - citeulike:1988262 TI - Fluctuation-Dissipation Theorem in an Aging Colloidal Glass JF - Physical Review Letters VL - 98 IS - 10 PB - APS N2 - We provide a direct experimental test of the fluctuation-dissipation theorem (FDT) in an aging colloidal glass. The use of combined active and passive microrheology allows us to independently measure both the correlation and response functions in this nonequilibrium situation. Contrary to previous reports, we find no deviations from the FDT over several decades in frequency (1 Hz–10 kHz) and for all aging times. In addition, we find two distinct viscoelastic contributions in the aging glass, including a nearly elastic response at low frequencies that grows during aging. KW - 2007 KW - aging KW - colloids KW - experiment KW - glass KW - theory AU - Farouji, Sara AU - Mizuno, Daisuke AU - Atakhorrami, Maryam AU - Mackintosh, Fred AU - Schmidt, Christoph AU - Eiser, Erika AU - Wegdam, Gerard AU - Bonn, Daniel PY - 2007/// UR - http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=PRLTAO000098000010108302000001&idtype=cvips&gifs=yes ER -

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