Dresden 2011 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 36: Poster Session II (Metals; Nanostructures at surfaces; Surface or interface magnetism; Spin-Orbit Interaction at Surfaces; Electron and spin dynamics; Surface dynamics; Methods; Theory and computation of electronic structure)
O 36.69: Poster
Dienstag, 15. März 2011, 18:30–22:00, P4
Fabrication of tungsten oxide nanotube arrays in porous alumina membranes by a sol-gel-process — •Stefan Bartels1,2, Hui Sun1,2, Yong Lei1,2, and Gerhard Wilde1,2 — 1Institut für Materialphysik, WWU Münster — 2Center for NanoTechnology, Münster
Tungsten oxide (WO3) is a suitable material for gas sensing applications relying on the change of conductivity by adsorped molecules. Regular arrays of nanotubes provide a large surface area and promise very high sensitivity. This work presents the production of such nanotube arrays with the potential of tuning the surface area by sol-gel-deposition of WO3 in porous alumina membranes (PAM) from the precursors tungsten hexachloride (WCl6) and acetylacetone (C5H8O2). Dimensions and composition of the nanotubes are characterized by SEM and EDX, their sensing properties for CO and NO2 will be investigated.