Adhesion and wear of colloidal silica probed by force microscopy Academic Article

abstract

• The adhesion and wear of colloidal silica nanoparticles (50 nm diameter) dispersed in a film have been directly studied using atomic force microscopy (AFM) under aqueous solution conditions. The adhesion between surface-bound silica particles and the AFM tip is found to peak in strength between pH 4 and 5. Using the JKR contact mechanics model, the energy for a single Si-OH/Si-OH interaction was estimated to be 0.4 0.1 kcal/mol. Tribochemical wear of the silica particles, and their displacement from the film, is enhanced at high pH due to the increased facility of silica dissolution and the concomitant increase in attendant inter-particle repulsion.

authors

• Batteas, James

published proceedings

• TRIBOLOGY LETTERS

author list (cited authors)

• Batteas, J. D., Quan, X. H., & Weldon, M. K.

citation count

• 28

complete list of authors

• Batteas, JD||Quan, XH||Weldon, MK

publication date

• September 1999

publisher

• Springer Nature  Publisher

published in

• TRIBOLOGY LETTERS  Journal

keywords

• Adhesion
• Atomic Force Microscopy
• Oxides
• Silica
• Sol-gel
• Tribology
• Wear

Digital Object Identifier (DOI)

• 10.1023/A:1019125521376

start page

• 121

end page

• 128

volume

• 7

issue

• 2-3

URL

• http%3A%2F%2Fdx.doi.org%2F10.1023%2Fa%3A1019125521376