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Adsorption of rhodamine 6G at the water-air interface

Research output: Contribution to journalJournal article

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<mark>Journal publication date</mark>05/2008
<mark>Journal</mark>Physica Status Solidi C
Issue number5
Volume5
Number of pages3
Pages (from-to)1187-1189
Publication statusPublished
Original languageEnglish
Event4th International Conference on Spectroscopic Ellipsometry (ICSE-4) - Stockholm, Sweden
Duration: 11/06/200715/06/2007

Conference

Conference4th International Conference on Spectroscopic Ellipsometry (ICSE-4)
CountrySweden
CityStockholm
Period11/06/0715/06/07

Abstract

We wanted to detect and quantify adsorption of Rhodamine 6G (R6G) at the air/water interface to supplement previous work using second harmonic generation [1-4]. We found that at incidence angles close to the Brewster angle this can be achieved, even at very low bulk concentration, Fitting to a single film model, we found that adsorption can be measured down to very low concentrations of 10(-7) M. This is contrasted with the behaviour of other dyes and other solvents. Outside the wavelength range of the dye absorption band the refractive index of the surface approaches that of pure water.