Fluctuation-dissipation theorem in an aging colloidal glass.
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.
Jabbari-Farouji
Sara
S
Van der Waals-Zeeman Institute, University of Amsterdam, 1018XE Amsterdam, the Netherlands.
Mizuno
Daisuke
D
Atakhorrami
Maryam
M
MacKintosh
Fred C
FC
Schmidt
Christoph F
CF
Eiser
Erika
E
Wegdam
Gerard H
GH
Bonn
Daniel
D
D000465:Algorithms; D003102:Colloids / Q000737:chemistry*; D004548:Elasticity; D012212:Rheology / Q000706:statistics & numerical data*; D013535:Suspensions; D013997:Time Factors; D014783:Viscosity; D014867:Water
D003102:Colloids; D013535:Suspensions; D014867:Water