Measurement of forces in liquids using a force microscope

作者：William A. Ducker, Tim J. Senden, Richard Mark Pashley · 发表于：Langmuir · 年份：1992 · DOI：10.1021/la00043a024 · 被引用次数：1083 · 研究领域：Force Microscopy Techniques and Applications、Mechanical and Optical Resonators

A force microscope has been used to measure surface forces between a colloidal sphere (3.5 μm radius) and a flat surface in aqueous solution. The force between silica surfaces was measured as a function of surface separation, salt concentration, and pH, and the results agree well both with earlier measurements between macroscopic surfaces and, at separations greater than 3 nm, with the force predicted by DLVO theory. The technique is simple and reproducible and could be used to measure the forces acting on other colloid particles and fibers of a variety of compositions. This is demonstrated by measurement of the force on a gold-coated sphere.