Adsorption of rhodamine 6G at the water-air interface

Greef, R. and Frey, J. G. and Robinson, J. and Danos, L. (2008) Adsorption of rhodamine 6G at the water-air interface. Physica Status Solidi C, 5 (5). pp. 1187-1189. ISSN 1610-1634

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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.

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Journal Article
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Physica Status Solidi C
?? 2nd-harmonic generation ??
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19 Mar 2013 10:31
Last Modified:
15 Jul 2024 13:41