Regensburg 2010 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 41: Poster Session I (Semiconductor Substrates: Epitaxy and growth; Semiconductor Substrates: Adsorbtion; Semiconductor Substrates: Solid-liquid interfaces; Semiconductor Substrates: Clean surfaces; Oxides and insulators: Epitaxy and growth; Oxides and insulators: Adsorption; Oxides and insulators: Clean surfaces; Organic, polymeric and biomolecular films - also with adsorbates; Organic electronics and photovoltaics, Surface chemical reactions; Heterogeneous catalysis; Phase transitions; Particles and clusters; Surface dynamics; Surface or interface magnetism; Electron and spin dynamics; Spin-Orbit Interaction at Surfaces; Electronic structure; Nanotribology; Solid/liquid interfaces; Graphene; Others)
O 41.19: Poster
Dienstag, 23. März 2010, 18:30–21:00, Poster B1
In-situ preparation and characterisation of thick films of Calcium hydroxide — •Sebastian Dahle1 und Wolfgang Maus-Friedrichs1,2 — 1Institut für Physik und Physikalische Technologien, TU Clausthal, Leibnizstr. 4, 38678 Clausthal-Zellerfeld, Germany — 2Clausthaler Zentrum für Materialtechnik, TU Clausthal, Leibnizstr. 4, 38678 Clausthal-Zellerfeld, Germany
The interaction of Calcium hydroxide with different gases is of technological interest for various applications. For example Calcium hydroxide is used as absorbent and reacting agent for neutralisation and desulphurisation, as well as a plaster. Understanding the behaviour of Calcium hydroxide in different environments is expected to lead to increased environmental protection und energy efficiency. The investigation of the interaction processes starts in a clean environment under controlled conditions. Therefore clean films of Calcium hydroxide have to be prepared.
The preparation of thick films of Calcium hydroxide in an Ultra High Vacuum environment using a metal evaporator in combination with a gas inlet system is presented on this poster. In contrast to Calcium oxide that can easily be prepared, Calcium hydroxide shows effects of reduction via impinging Calcium atoms during the preparation. These effects have been studied with Metastable Induced Electron Spectroscopy (MIES), Photoelectron Spectroscopy (UPS(HeI) and XPS), as well as Atomic Force Microscopy (AFM).