Dresden 2014 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 34: Poster Session
MM 34.24: Poster
Dienstag, 1. April 2014, 18:00–20:00, P4
Transport Properties of Single TiO2 Nanotubes — •Markus Stiller1, Jose Barzola-Quiquia1, Israel Lorite1, Pablo Esquinazi1, Robin Kirchgeorg2, Sergiu P. Albu2, and Patrik Schmuki2,3 — 1Division of Superconductivity and Magnetism, Institute for Experimental Physics II, University of Leipzig, D-04103 Leipzig, Germany — 2Chair for Surface Science and Corrosion Department Material Science and Engineering, University of Erlangen, D-91058 Erlangen, Germany — 3Department of Chemistry, King Abdulaziz University, Jeddah, Saudi Arabia
We have investigated the electric transport properties of single TiO2 nanotubes separated from an anodic titania nanotube array. The nanotubes have been contacted using electron beam lithography and several transport properties have been measured. The temperature dependence of the resistance, measured with the conventional four point method, of all investigated samples, show a Mott variable range hopping behavior. The results obtained with two contacts indicate the existence of a potential barrier between the Cr/Au contacts and samples surfaces, which influence is clearly observable for temperatures less than 150 K. Impedance spectroscopy in the frequency range of 40 Hz to 1 MHz carried out at room temperature, indicates that the electronic transport of these polycrystalline tubes is dominated by the grain cores.