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 x 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 x 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. (C) 2003 Elsevier Science B.V. All rights reserved.
Growth morphology and electronic structure of 2D ordered pentacene on the Au(110)-(1 x 2) surface / V., Corradini; C., Menozzi; M., Cavallini; F., Biscarini; Betti, Maria Grazia; Mariani, Carlo. - In: SURFACE SCIENCE. - ISSN 0039-6028. - 532:(2003), pp. 249-254. (Intervento presentato al convegno 7th International Conference on Nanometer-Scale Science and Technology (NANO-7)/21st European Conference on Surface Science (ECOSS-21) tenutosi a MALMO, SWEDEN nel JUN 24-28, 2002) [10.1016/s0039-6028(03)00167-5].
Growth morphology and electronic structure of 2D ordered pentacene on the Au(110)-(1 x 2) surface
BETTI, Maria Grazia;MARIANI, CARLO
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 x 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 x 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. (C) 2003 Elsevier Science B.V. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.