J. Phys. IV France 12 (2002) Pr9-319
Time dependent static friction force of agar gel-on-glass plate immersed in waterT. Nitta1, H. Haga1 and K. Kawabata2
1 Division of Physics, Graduate School of Sciences, Hokkaido University, Sapporo 060-0810, Japan
2 Division of Biological Sciences, Graduate School of Sciences, Hokkaido University, Sapporo 060-0810, Japan
We measured the static friction force of agar gel-on-glass plate in water. The static friction force is independent of the apparent contact area between the agar gel and the glass plate. It increases with waiting time, that is, contact duration prior to motion. The static friction force is represented well by a power law of waiting time. The waiting time dependence is different from those of solid-on-solid systems. These results are discussed, based on asperity contact model.
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