FORMATION OF ORDERED MOLECULAR OVERLAYERS BY A TEMPERATURE-INDUCED SURFACE REACTION: HEXABUTYLOXYTRIPHENYLENE ONCu(111)

H. Wegner, K. Weiss and Ch. Wöll
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H. Wegner: Ruhr-Universität Bochum, Physikalische Chemie I, 44780 Bochum, Germany
K. Weiss: Ruhr-Universität Bochum, Physikalische Chemie I, 44780 Bochum, Germany
Ch. Wöll: Ruhr-Universität Bochum, Physikalische Chemie I, 44780 Bochum, Germany

Surface Review and Letters (SRL), 1999, vol. 06, issue 02, 183-192

Abstract: Molecular monolayers obtained by the adsorption of hexabutyloxytriphenylene (HBT) onCu(111)were investigated by scanning tunneling microscopy (STM), X-ray photoelectron spectroscopy (XPS), X-ray absorption spectroscopy (XAS) and thermal desorption spectroscopy (TDS). Adsorption at room temperature results in the formation of a disordered layer of physisorbed molecules. Annealing at temperatures of 600 K is found to induce a chemical reaction of the molecule with the substrate, leading to a desorption of the butyl fragments. This chemical reaction is accompanied by the formation of a highly ordered, well-defined oxytriphenylene layer which is stable for temperatures of up to 600 K.

Date: 1999
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DOI: 10.1142/S0218625X99000214

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