title: Noncontact single-pulse optical method to measure interfacial properties in intact systems.
abstract: We introduce a noncontact purely optical approach to measuring the localized surface properties of an interface within a system using a single optical pressure pulse and a time-resolved digital holographic quantitative phase-imaging technique to track the propagating nanometric capillary disturbance. We demonstrate the proposed method's ability to measure the surface energy of deionized water, methanol, and chemical monolayers formed by surfactants with good agreement to published values. The development of this technique boasts immediate application to static and dynamic systems and near-future applications for living biological cell membranes.
authors.affiliation: Department of Physics, University of South Florida, 4202 E. Fowler Avenue, Tampa, Florida 33620, USA.
authors.forename: David C
authors.initials: DC
authors.lastname: Clark
authors.forename: Myung K
authors.initials: MK
authors.lastname: Kim
mesh_terms: D002197:Capillary Action; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007368:Interferometry / Q000295:instrumentation*; D007834:Lasers; D055096:Optical Devices; D012212:Rheology / Q000295:instrumentation*; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*; D013499:Surface Properties