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Optical trapping microrheology in cultured human cells

Bertseva, E. ; Grebenkov, D. ; Schmidhauser, P. ; Gribkova, S. ; Jeney, S. ; Forró, L.

In: The European Physical Journal E, 2012, vol. 35, no. 7, p. 1-8

Accounting for inertia effects to access the high-frequency microrheology of viscoelastic fluids

Domínguez-García, P. ; Cardinaux, Frédéric ; Bertseva, Elena ; Forró, László ; Scheffold, Frank ; Jeney, Sylvia

In: Physical Review E, 2014, vol. 90, no. 6, p. 060301

We study the Brownian motion of microbeads immersed in water and in a viscoelastic wormlike micelles solution by optical trapping interferometry and diffusing wave spectroscopy. Through the mean-square displacement obtained from both techniques, we deduce the mechanical properties of the fluids at high frequencies by explicitly accounting for inertia effects of the particle and the surrounding...