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Rough surface adhesion in the presence of capillary condensation

Journal Article · · Applied Physics Letters
DOI:https://doi.org/10.1063/1.2723658· OSTI ID:1426973
 [1];  [2];  [3];  [3];  [4]
  1. Univ. of California, Berkeley, CA (United States). Department of Chemical Engineering
  2. Univ. of Colorado, Boulder, CO (United States). Department of Mechanical Engineering
  3. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). Microscale Science and Technology Department
  4. 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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Cited By (7)

Environment‐Dependent Adhesion Energy of Mica Nanolayers Determined by a Nanomanipulation‐Based Bridging Method journal December 2018
Microelectromechanical Systems and Packaging book November 2016
Roughness correction to the Casimir force at short separations: Contact distance and extreme value statistics journal April 2012
Mechanics of Adhered, Pressurized Graphene Blisters journal May 2013
Optical Properties and Kinetic Roughening Influence on Dispersive Casimir and van der Waals Forces journal December 2010
Roughness correction to the Casimir force at short separations: Contact distance and extreme value statistics text January 2012
Mechanics of Adhered, Pressurized Graphene Blisters text January 2013

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