Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Adsorption of rhodamine 6G at the water-air interface
AU - Greef, R.
AU - Frey, J. G.
AU - Robinson, J.
AU - Danos, L.
PY - 2008/5
Y1 - 2008/5
N2 - 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.
AB - 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.
KW - 2ND-HARMONIC GENERATION
U2 - 10.1002/pssc.200777821
DO - 10.1002/pssc.200777821
M3 - Journal article
VL - 5
SP - 1187
EP - 1189
JO - Physica Status Solidi C
JF - Physica Status Solidi C
SN - 1610-1634
IS - 5
T2 - 4th International Conference on Spectroscopic Ellipsometry (ICSE-4)
Y2 - 11 June 2007 through 15 June 2007
ER -