High-quality ordered growth and characterization of organic systems is an important requirement to understand the physical properties underlying the new organic-molecule based electronic devices. In this work, pentacene (C22H14) is ultra-high-vacuum deposited in situ on the (1 × 2)-reconstructed surface of Au(110), at different substrate temperatures. Low-energy electron diffraction reveals a two-dimensional (2D) ordered phase, showing the presence of a (1×3) pentacene-induced long-range periodicity, for room-temperature deposition. High-resolution UV photoelectron spectroscopy investigations for pentacene adsorption at room- and low- (80 K) temperature, bring to light the new interface electronic levels and the molecular orbital evolution. Higher substrate temperature (370 K) during adsorption induces higher pentacene mobility, thus improving long-range ordering. Atomic force microscopy images at higher coverage show the presence of pentacene stripes, grown on top of the first 2D ordered layer, with a preferred orientation perpendicular to the substrate [1-10] direction. © 2003 Elsevier Science B.V. All rights reserved.
Growth morphology and electronic structure of 2D ordered pentacene on the Au(1 1 0)-(1 × 2) surface / Corradini, V.; Menozzi, C.; Cavallini, M.; Biscarini, F.; Betti, M. G.; Mariani, C.. - In: SURFACE SCIENCE. - ISSN 0039-6028. - 532-535:(2003), pp. 249-254. (Intervento presentato al convegno 7th International Conference on Nanometer-Scale Science and Technology and 21st European Conference on Surface Science tenutosi a Malmo, swe nel 2002) [10.1016/S0039-6028(03)00167-5].
Growth morphology and electronic structure of 2D ordered pentacene on the Au(1 1 0)-(1 × 2) surface
Biscarini F.;
2003
Abstract
High-quality ordered growth and characterization of organic systems is an important requirement to understand the physical properties underlying the new organic-molecule based electronic devices. In this work, pentacene (C22H14) is ultra-high-vacuum deposited in situ on the (1 × 2)-reconstructed surface of Au(110), at different substrate temperatures. Low-energy electron diffraction reveals a two-dimensional (2D) ordered phase, showing the presence of a (1×3) pentacene-induced long-range periodicity, for room-temperature deposition. High-resolution UV photoelectron spectroscopy investigations for pentacene adsorption at room- and low- (80 K) temperature, bring to light the new interface electronic levels and the molecular orbital evolution. Higher substrate temperature (370 K) during adsorption induces higher pentacene mobility, thus improving long-range ordering. Atomic force microscopy images at higher coverage show the presence of pentacene stripes, grown on top of the first 2D ordered layer, with a preferred orientation perpendicular to the substrate [1-10] direction. © 2003 Elsevier Science B.V. All rights reserved.
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