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Whispering gallery modes (WGM) of dye-doped polystyrene beads with diameters from 20 down to 1.5 μm are studied with respect to their appearance and linewidth by excitation of the entire mode spectrum within the emission range of the dye. The lowest order (q=1) modes, which travel most closely to the inner particle surface, are assigned to their individual quantum numbers by means of a least-square-fit,...
Self-assembled monolayers of docosanethiol (CH3-(CH2)21-SH) were investigated by IR-vis sum frequency generation (SFG). Well-ordered monolayers and films with submonolayer coverage with a high number of gauche conformations were prepared on polycrystalline gold substrates. Exposure to a saturated mercury atmosphere induces a major reorganization of the adsorbate phase indicated by a decrease of the...
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