Bonding and structure of glycine on ordered Al2O3 film surfaces

The interaction between glycine (NH2CH2COOH) layers and an ultrathin Al2O3 film grown epitaxially onto NiAl(110) was studied by temperature-programmed desorption, X-ray photoelectron spectroscopy, ultraviolet photoelectron spectroscopy, work function measurements, and near-edge X-ray absorption fine...

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Veröffentlicht in:Langmuir : the ACS journal of surfaces and colloids. - 1992. - 20(2004), 24 vom: 23. Nov., Seite 10551-9
1. Verfasser: Tzvetkov, G (VerfasserIn)
Weitere Verfasser: Koller, G, Zubavichus, Y, Fuchs, O, Casu, M B, Heske, C, Umbach, E, Grunze, M, Ramsey, M G, Netzer, F P
Format: Aufsatz
Sprache:English
Veröffentlicht: 2004
Zugriff auf das übergeordnete Werk:Langmuir : the ACS journal of surfaces and colloids
Schlagworte:Journal Article Research Support, Non-U.S. Gov't Membranes, Artificial Aluminum Oxide LMI26O6933 Glycine TE7660XO1C
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520 |a The interaction between glycine (NH2CH2COOH) layers and an ultrathin Al2O3 film grown epitaxially onto NiAl(110) was studied by temperature-programmed desorption, X-ray photoelectron spectroscopy, ultraviolet photoelectron spectroscopy, work function measurements, and near-edge X-ray absorption fine structure (NEXAFS) spectroscopy. At monolayer coverages at 110 K, there are two coexisting molecular forms: the anionic (NH2CH2COO-) and the zwitterionic form (NH3+CH2COO-) of glycine. As deduced from the photoemission data, the buildup of multilayers at 110 K leads to a condensed phase predominantly in the zwitterionic state. In contrast to the monolayer at 110 K, the monolayer formed at 300 K consists primarily of glycine molecules in the anionic state. The latter species is adsorbed with the oxygen atoms of the carboxylic group pointing toward the substrate. The polarization-dependent C K- and O K-edge NEXAFS spectra indicate that the glycinate species in the monolayer at 300 K is oriented nearly perpendicular to the surface, with the amino group pointing away from the surface 
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700 1 |a Koller, G  |e verfasserin  |4 aut 
700 1 |a Zubavichus, Y  |e verfasserin  |4 aut 
700 1 |a Fuchs, O  |e verfasserin  |4 aut 
700 1 |a Casu, M B  |e verfasserin  |4 aut 
700 1 |a Heske, C  |e verfasserin  |4 aut 
700 1 |a Umbach, E  |e verfasserin  |4 aut 
700 1 |a Grunze, M  |e verfasserin  |4 aut 
700 1 |a Ramsey, M G  |e verfasserin  |4 aut 
700 1 |a Netzer, F P  |e verfasserin  |4 aut 
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