Laser inhibited diffusion in rhodamine-ethanol solutions |
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| Authors: | Nabil M Lawandy Peter L Fuhr DW Robinson |
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| Institution: | Goddard Space flight Center, Greenbelt, MD 20771, USA;Chemistry Department, Johns Hopkins University, Baltimore, MD 21218, USA |
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| Abstract: | The diffusion of rhodamine-6G dye in ethanol is observed to be inhibited by optical pumping by a cadmium laser. The diffusion process is observed as a function of the solution temperature. The relative difference in diffusion coefficients with and without optical pumping is calculated. The effect is interpreted as being due to a stronger solvent-dye interaction in the first excited singlet state of rhodamine-6G. |
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