通过德亚金、朗道、韦弗伊和奥弗贝克表面力在电解质溶液中对胶体探针悬臂梁进行直接校准。

Direct calibration of colloidal probe cantilevers via Derjaguin, Landau, Verwey, and Overbeek surface forces in electrolyte solution.

作者信息

Hong Xiaoting, Willing Gerold A

机构信息

Department of Chemical Engineering, University of Louisville, Louisville, Kentucky 40292, USA.

出版信息

Rev Sci Instrum. 2008 Dec;79(12):123709. doi: 10.1063/1.3046284.

DOI:10.1063/1.3046284

PMID:19123571

Abstract

The development of colloidal probe microscopy has made it possible to directly measure the interaction forces between two different surfaces in solution. Cantilever calibration is presently a subject of intense experimental and theoretical interest due to the need for accurate force measurement. We developed a novel and direct calibration method for colloidal probe cantilevers to which a silica microsphere has been previously attached based on fitting experimental force curves for the interaction between the silica sphere and a silica flat in dilute KBr solutions to the theoretical Derjaguin, Landau, Verwey, and Overbeek force curves using the measured zeta potential of the silica surfaces.

摘要

胶体探针显微镜的发展使得直接测量溶液中两个不同表面之间的相互作用力成为可能。由于需要精确测量力，悬臂校准目前是一个受到广泛实验和理论关注的课题。我们基于将二氧化硅球与二氧化硅平板在稀KBr溶液中的相互作用的实验力曲线拟合到使用测量的二氧化硅表面zeta电位的理论德亚金、朗道、韦弗伊和奥弗贝克力曲线，开发了一种新颖的、直接的胶体探针悬臂校准方法，该悬臂先前已附着有二氧化硅微球。