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We report on the growth and morphology of α-quaterthiophene and α-sexithiophene clusters, needles (or “fibers”), and flat islands on muscovite mica (001). Samples are prepared by organic molecular beam deposition, and characterized ex situ by polarized fluorescence microscopy and by atomic force microscopy. The growth mechanism of such thiophene fibers is compared to that of para-phenylenes. Distinct...
Linear and non-linear optical spectroscopies are applied to monitor the formation of large, several 10-nm-sized alkali clusters near epitaxially grown Au films on mica substrates. The Au films are covered by ultrathin, self-assembled alkane thiol films. The growth and morphology of these clusters are initially monitored in ultrahigh vacuum by comparison of calculated with measured polarization-dependent...
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