Estimation of the Hamaker constants by sedimentation field-flow fractionation.
van der Waals forces are one of several forces that control the adhesion between two materials. These forces are important to quantify in adhesion studies because they are always present and are always attractive. The major problem in calculating the van der Waals interaction between colloidal particles is that of evaluating the Hamaker constant. Hence, an accurately determined Hamaker constant for a given material is needed when interfacial phenomena such as adhesion are discussed in terms of the total potential energy between a particle and a substrate. In this paper, a new simple and accurate methodology for the estimation of the Hamaker constant is introduced. The results are in good agreement with those values found in literature.
Farmakis
Lambros
L
Department of Chemistry, University of Patras, GR-26504 Patras, Greece. LFarmakis@chemistry.upatras.gr
Lioris
Nikolaos
N
Koliadima
Athanasia
A
Karaiskakis
George
G
D000268:Adhesiveness; D031521:Fractionation, Field Flow / Q000379:methods*; D008433:Mathematics; D009994:Osmolar Concentration; D013499:Surface Properties