Structure and Electrical Properties of Electrochemical Anodized Valve Metal

ORAL

Abstract

Localized electrochemical anodization has been used to prepare metal tunnel junctions. The room-temperature I-V characteristics of anodized Vanadium, Tantalum and Titanium ultra small wires were studied. The nonlinear I-V curves indicate they behave as tunnel junctions. The resistance and tunneling characteristics are strongly determined by the details of anodization process. The High Resolution Transmission Electron Microscope (HRTEM) is used to explore the structure of the anodized Ti and V films and we found there are some crystaline grains on the bottom of the V film and in the center of Ti film. The grain size and the distance between two grains are changed by how the anodization process was terminated. Low temperature electrical properties of anodized films will be reported.

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Authors

  • Wenbin Fan

    Department of Materials Science and Engineering, University of Virginia

  • David Kirkwood

    Department of Materials Science and Engineering, University of Virginia

  • Jiwei Lu

    Department of Materials Science and Engineering, University of Virginia, Charlottsville, VA 22904

  • Stuart Wolf

    University of Virginia, Department of Materials Science and Engineering, University of Virginia, Charlottsville, VA 22904, Department of Materials Science and Engineering, University of Virginia, Department of Materials and Engineering and Department of Physics, University of Virginia