Bv. Zhmud et al., Application of charge regulation model for evaluation of surface ionization parameters from atomic force microscopy (AFM) data, COLL SURF A, 164(1), 2000, pp. 3-7
Citations number
15
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
The present state of affairs with calculation of electrostatic interaction
between two charge regulated surfaces is briefly reviewed, placing a specia
l emphasis on assumptions and limitations of underlying physical models. An
application of the charge regulation model for evaluation of surface ioniz
ation parameters from the interaction force profile measured with an atomic
force microscope in a symmetric silica-silica system is demonstrated. The
site density and the dissociation equilibrium constant of surface silanols
are determined. As can be judged from the results obtained, surface silanol
s are considerably more acidic than it was considered before. (C) 2000 Else
vier Science B.V. All rights reserved.