Estimation of the Hamaker constants by sedimentation field-flow fractionation

被引：5

作者：

Farmakis, Lambros ^{[1
]}

Lioris, Nikolaos ^{[1
]}

Kohadima, Athanasia ^{[1
]}

Karaiskakis, George ^{[1
]}

机构：

[1] Univ Patras, Dept Chem, GR-26504 Patras, Greece

来源：

JOURNAL OF CHROMATOGRAPHY A | 2006年 / 1137卷 / 02期

关键词：

Hamaker constant; potential energy; interaction forces; colloid stability; field-flow fractionation;

D O I：

10.1016/j.chroma.2006.10.019

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

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. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：231 / 242

页数：12

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[1] Comparisons of Hamaker constants for ceramic systems with intervening vacuum or water: From force laws and physical properties [J].