Dresden 2011 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 60: Poster Session IV (Solid/liquid interfaces; Semiconductors; Oxides and insulators; Graphene; Plasmonics and nanooptics; Electronic Structure; Surface chemical reactions; Heterogeneous catalysis)

O 60.29: Poster

Mittwoch, 16. März 2011, 17:30–21:00, P4

FUNCTIONALIZATION OF THE TIO_2 (110) SURFACE BY TEREPHTHALIC ACID TOWARD THE MOF GROWTH — •Michael Naboka, Alexei Nefedov, and Christof Wöll — Institute of Functional Interfaces, Karlsruher Institute of Technology, D- 76344 Eggenstein-Leopoldshafen, Germany

Chemically functionalized surfaces play an important role in many nanotechnological applications. A functionalization of TiO2 surface by adsorption of TPA (C6H4(COOH)2) molecules has already been studied previously. It was shown that TPA has a flat orientation at low coverages and up-standing carboxyl-terminated orientation at high coverages. This up-standing orientation at the coverage of one monolayer means that the this system may found similar application to carboxyl-terminated self assembling monolayers. Metal Organic Frameworks (MOFs) is a class of material where metal ions are bound together with organic ligands forming the 2D or 3D porous structure. In addition to the use of MOFs as powders there is currently a significant interest to anchor and grow them on functionalized surfaces. The first steps in this direction were made on the TPA-functionalized TiO2(110) surface. For this purposes the stability of the TPA/TiO2 (110) system was tested by exposing it to the nitrogen atmosphere and subsequent NEXAFS measurements. After that the sample was immersed in the copper trifluoroacetate solution. The obtained structure was studied by NEXAFS and XPS.