Mechanism of contrast formation in atomic force microscopy in water

Watkins, Matthew and Shluger, Alexander L. (2010) Mechanism of contrast formation in atomic force microscopy in water. Physical Review Letters, 105 (19). ISSN 0031-9007

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Item Type:Article
Item Status:Live Archive


We use computer modeling to investigate the mechanism of atomic-scale corrugation in frequency-modulation atomic force microscopy imaging of inorganic surfaces in solution. Molecular dynamics simulations demonstrate that the forces acting on a microscope tip result from the direct interaction between a tip and a surface, and forces entirely due to the water structure around both tip and surface. The observed force depends on a tip structure and is a balance between largely repulsive potential energy changes as the tip approaches and the entropic gain when water is sterically prevented from occupying sites near the tip and surface. © 2010 The American Physical Society.

Keywords:atomic force microscopy, contrast formation, atomic scale corrugation, Inorganic surfaces, Molecular dynamics, Water, Potential energy, entropic gain
Subjects:F Physical Sciences > F300 Physics
Divisions:College of Science > School of Mathematics and Physics
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ID Code:17711
Deposited On:19 Aug 2015 13:28

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