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The technique of evanescent-wave-generated-fluorescence spectroscopy EWGFS has been applied here to the investigation of the critical-point wetting in the phase-separated mixture (n-heptane+perfluoro-n-hexane). The discrimination between the two coexisting liquid phases was achieved by exploiting the fluorescence lifetime difference of the fluorophor 1,6-diphenyl-hexatriene in each of the phases...
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