title: Direct calibration of colloidal probe cantilevers via Derjaguin, Landau, Verwey, and Overbeek surface forces in electrolyte solution.
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.
authors.affiliation: Department of Chemical Engineering, University of Louisville, Louisville, Kentucky 40292, USA.
authors.forename: Xiaoting
authors.initials: X
authors.lastname: Hong
authors.forename: Gerold A
authors.initials: GA
authors.lastname: Willing
mesh_terms: D001965:Bromides / Q000737:chemistry; D002138:Calibration; D003102:Colloids / Q000737:chemistry*; D004573:Electrolytes; D004867:Equipment Design; D006863:Hydrogen-Ion Concentration; D018625:Microscopy, Atomic Force / Q000295:instrumentation* / Q000379:methods; D008863:Microspheres; D009995:Osmosis; D010825:Physics / Q000379:methods; D017680:Potassium Compounds / Q000737:chemistry; D012822:Silicon Dioxide / Q000737:chemistry; D012984:Software; D013499:Surface Properties
chemical_list: D001965:Bromides; D003102:Colloids; D004573:Electrolytes; D017680:Potassium Compounds; D012822:Silicon Dioxide; C039004:potassium bromide