Adsorption of rhodamine 6G at the water-air interface
Adsorption of rhodamine 6G at the water-air interface
We wanted to detect and quantify adsorption of Rhodamine 6G (R6G) at the air/water interface to supplement previous work using second harmonic generation1-4. 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 10-7M. 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.
ellipsometry, rhodamine 6G, air/water interface, adsorption
1187-1189
Greef, R.
91063544-ed89-4738-b5f4-28a984bf5866
Frey, J.G.
ba60c559-c4af-44f1-87e6-ce69819bf23f
Robinson, J.
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Danos, L.
c831e137-37b9-42cc-ab8c-49de31038922
May 2008
Greef, R.
91063544-ed89-4738-b5f4-28a984bf5866
Frey, J.G.
ba60c559-c4af-44f1-87e6-ce69819bf23f
Robinson, J.
3fd57426-1b8a-4976-be41-27845932ad20
Danos, L.
c831e137-37b9-42cc-ab8c-49de31038922
Greef, R., Frey, J.G., Robinson, J. and Danos, L.
(2008)
Adsorption of rhodamine 6G at the water-air interface.
Physica Status Solidi (c), 5 (5), .
(doi:10.1002/pssc.200777821).
Abstract
We wanted to detect and quantify adsorption of Rhodamine 6G (R6G) at the air/water interface to supplement previous work using second harmonic generation1-4. 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 10-7M. 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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Submitted date: 9 June 2007
Published date: May 2008
Additional Information:
In special issue: 4th International Conference on Spectroscopic Ellipsometry (ICSE4)
Venue - Dates:
4th International Conference on Spectroscopic Ellipsometry, , Stockholm, Sweden, 2007-06-11 - 2007-06-15
Keywords:
ellipsometry, rhodamine 6G, air/water interface, adsorption
Organisations:
Engineering Mats & Surface Engineerg Gp, Chemistry
Identifiers
Local EPrints ID: 49975
URI: http://eprints.soton.ac.uk/id/eprint/49975
ISSN: 1610-1634
PURE UUID: 4954e8a7-387f-4324-820d-dc23e84ad3fc
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Date deposited: 15 Apr 2008
Last modified: 16 Mar 2024 02:34
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Author:
R. Greef
Author:
J. Robinson
Author:
L. Danos
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