Rough surface adhesion in the presence of capillary condensation
- Univ. of California, Berkeley, CA (United States). Department of Chemical Engineering
- Univ. of Colorado, Boulder, CO (United States). Department of Mechanical Engineering
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). Microscale Science and Technology Department
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). MEMS Core Technologies Department
Capillary condensation of water can have a significant effect on rough surface adhesion. Here, to explore this phenomenon between micromachined surfaces, the authors perform microcantilever experiments as a function of surface roughness and relative humidity (RH). Below a threshold RH, the adhesion is mainly due to van der Waals forces across extensive noncontacting areas. Above the threshold RH, the adhesion jumps due to capillary condensation and increases towards the upper limit of Γ=144mJ/m2. Lastly, a detailed model based on the measured surface topography qualitatively agrees with the experimental data only when the topographic correlations between the upper and lower surfaces are considered.
- Research Organization:
- Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA)
- Grant/Contract Number:
- AC04-94AL85000
- OSTI ID:
- 1426973
- Report Number(s):
- SAND--2007-1239J; 526713
- Journal Information:
- Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 16 Vol. 90; ISSN 0003-6951
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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