We study the capillary force in atomic force microscopy by using Monte Carlo simulations. Adopting a lattice gas model for water, we simulated water menisci that form between a rough silicon-nitride tip and a mica surface. Unlike its macroscopic counterpart, the water meniscus at the nanoscale gives rise to a capillary force that responds sensitively to the tip roughness. With only a slight change in tip shape, the pull-off force significantly changes its qualitative variation with humidity.
|Original language||English (US)|
|Number of pages||4|
|Journal||Journal of Physical Chemistry B|
|State||Published - Jan 19 2006|
ASJC Scopus subject areas
- Physical and Theoretical Chemistry