title: An evaluation of methods for contact angle measurement.
abstract: A systematic comparison of Wilhelmy-balance tensiometry (WBT), tilting-plate goniometry (TPG) and captive-drop goniometry (CDG), using a variety of silane-treated glass surfaces of variable wetting characteristics is reported. WBT was assumed to be the benchmark of comparison (gold standard). Advancing angles measured by TPG and CDG were in statistical agreement with corresponding WBT measurements. In contrast, receding angles from both goniometric techniques were systematically higher than WBT.
authors.affiliation: Department of Bioengineering, Huck Institute of Life Sciences, The Pennsylvania State University, University Park, PA 16802, USA.
authors.forename: Anandi
authors.initials: A
authors.lastname: Krishnan
authors.forename: Yi-Hsiu
authors.initials: YH
authors.lastname: Liu
authors.forename: Paul
authors.initials: P
authors.lastname: Cha
authors.forename: Roger
authors.initials: R
authors.lastname: Woodward
authors.forename: David
authors.initials: D
authors.lastname: Allara
authors.forename: Erwin A
authors.initials: EA
authors.lastname: Vogler
mesh_terms: D002627:Chemistry, Physical / Q000379:methods*; D005898:Glass; D013499:Surface Properties; D014867:Water
chemical_list: D014867:Water