Microrheology measurements with a hanging-fiber AFM probe
Abstract
A method to measure the viscosity of liquids at microscales is presented. It uses a thin glass fiber fixed on the tip of the cantilever of an extremely low noise Atomic Force Microscope (AFM), which accurately measures the cantilever {deflection}. When the fiber is dipped into the liquid the dissipation of the cantilever-fiber system increases. This dissipation, linked to the liquid viscosity, is computed from the power spectral density of the thermal fluctuations of the cantilever {deflection}. The {high sensitivity of the AFM} allows us to show the existence and to develop a model of the coupling between the dynamics of the fiber and that of the cantilever. This model {accurately} fits the experimental data. The advantages and draw-backs of the method are discussed
Keywords
Cite
@article{arxiv.1311.2217,
title = {Microrheology measurements with a hanging-fiber AFM probe},
author = {Clemence Devailly and Justine Laurent and Audrey Steinberger and Ludovic Bellon and Sergio Ciliberto},
journal= {arXiv preprint arXiv:1311.2217},
year = {2013}
}