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Measurement of Interaction Forces between Silica and α-Alumina by Atomic Force Microscopy by S. Veeramasuneni; M.R. Yalamanchili; J.D. Miller is a Chemistry article available to read on EtoBox.

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Interaction forces between a silica sphere and an a-alumina ments has been the surface force apparatus (2) in which substrate at various pH values were measured by atomic force forces between two macroscopic surfaces (usually mica) are microscopy (AFM). As expected, at pH values of 10.8 and 10.2 measured. In recent years, atomic force microscopy (AFM) when the surfaces are similarly charged, a repulsive force was has gained popularity as a technique for force measurements observed. On the other hand, at pH values of 5.5, 6.4, and 8.6 (7). Forces between a sharp tip and a flat surface have been when the surfaces are oppositely charged, attractive forces were measured both in air (8, 9) and in aqueous media (10, 11, observed. Experimental force vs separation distance curves were 12). However, these measured forces were not compared to found to be in good agreement with theoretical predictions based theoretical predictions because of the ill-defined geometry on electrostatic and van der Waals interactions. Interestingly, when the force/radius values at a particular separation distance of the tip. Recent advances in force measurements by atomic were plotted against pH, the transition f

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Author

S. Veeramasuneni; M.R. Yalamanchili; J.D. Miller

Publisher

Elsevier Science; Elsevier ; Elsevier Inc.; Elsevier BV (ISSN 0021-9797)

Published

1996

Language

EN

Field

Chemistry (Physical Sciences)