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- Bae, Sung Chul
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Contrasting friction and diffusion in molecularly thin confined films
- Author(s)
- Mukhopadhyay, Ashis, Zhao, Jiang, Bae, Sung Chul, Granick, Steve
- Issued Date
- 2002-09
- Citation
- PHYSICAL REVIEW LETTERS, v.89, no.13, pp.136103
- Abstract
- We study, using fluorescence correlation spectroscopy, translational diffusion in molecularly thin liquids confined within a surface forces apparatus. The diffusion coefficient decreases exponentially from the edges towards the center of the Hertzian contact and further suggests the presence of a small number of distinct diffusion processes. This holds alike a crystallizable fluid (OMCTS) and a glass-former (1,2-propane diol), both of which displayed static friction. We conclude that friction, the average of an ensemble of molecules, masked massively heterogeneous molecular mobility.
- Publisher
- AMERICAN PHYSICAL SOC
- ISSN
- 0031-9007
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