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Sliding fluids: Dewetting experiments reveal the solid/liquid boundary condition

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Bäumchen,  Oliver
Group Dynamics of fluid and biological interfaces, Department of Dynamics of Complex Fluids, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society;

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Seemann,  Ralf
Group Geometry of Fluid Interfaces, Department of Dynamics of Complex Fluids, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society;

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Citation

Bäumchen, O., Lessel, M., Fetzer, R., Seemann, R., & Jacobs, K. (2010). Sliding fluids: Dewetting experiments reveal the solid/liquid boundary condition. Journal of Physics: Conference Series, 216(1): 012002. doi:10.1088/1742-6596/216/1/012002.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0029-7709-C
Abstract
Nanoscale liquid polymer films are ideal candidates to probe the solid/liquid boundary condition: Prepared on hydrophobized Si wafer, the films are not stable, they dewet. The dewetting induces a flow without applying an external force. Probing the dynamics of the dewetting film and the morphology of the liquid front, we can deduce the slip length. A variation of the type of hydrophobic coating (silane or Teflon®) of the Si wafer enables us to tune the boundary condition from a no-slip to a nearly full-slip condition. For a short introduction to the topic, we offer a phenomenological approach and supply multimedia files.