We present a study on biosurfactant uptake at the interface of a millimeter-sized drop of squalene in water, by a recently developed differential interferometric technique. The technique allows detecting capillary waves, with amplitudes of the order of 10−9 m, excited on the surface of the drop by an electric field in the order of 5 V/cm. By studying the resonant surface modes of the drop it is possible to assess the interfacial properties as a function of the surfactant concentration in the water bulk. The technique allows to follow the adsorption process at extremely low surfactant concentration, not accessible by other methods, investigating the gas state in the π-A diagrams of 2D amphiphilic monolayers.
Interferometric investigation of the gas-state monolayer of mono-rhamnolipid adsorbing at an oil/water interface / P. Brocca, V. Rondelli, M. Corti, E. Del Favero, M. Deleu, L. Cantù. - In: JOURNAL OF MOLECULAR LIQUIDS. - ISSN 0167-7322. - 266(2018 Sep 15), pp. 687-691.
|Titolo:||Interferometric investigation of the gas-state monolayer of mono-rhamnolipid adsorbing at an oil/water interface|
BROCCA, PAOLA (Primo) (Corresponding)
RONDELLI, VALERIA MARIA (Secondo)
CANTU', LAURA FRANCA (Ultimo)
|Parole Chiave:||Bio-surfactant; Capillary waves; Confocal Fabry-Perot interferometer; Drop interferometer; Liquid/liquid interface; Monolayer gas phase; Monolayer gas state; Squalene; Electronic, Optical and Magnetic Materials; Atomic and Molecular Physics, and Optics; Condensed Matter Physics; Spectroscopy; Physical and Theoretical Chemistry; Materials Chemistry2506; Metals and Alloys|
|Settore Scientifico Disciplinare:||Settore FIS/07 - Fisica Applicata(Beni Culturali, Ambientali, Biol.e Medicin)|
|Data di pubblicazione:||15-set-2018|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1016/j.molliq.2018.06.121|
|Appare nelle tipologie:||01 - Articolo su periodico|