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MM: Metall- und Materialphysik

MM 30: Symposium Nano Wires (SYNW)

MM 30.8: Vortrag

Donnerstag, 30. März 2006, 12:45–13:00, IFW D

Electrical and Mechanical Characterization of Carbon/Metal Core/Shell Nanostructures and Pure Metallic Nanotubes — •Maik Eggers, Thorsten Staedler, and Xin Jiang — Institute of Materials Engineering, University of Siegen, Siegen, Germany

One-dimensional nanostructures have been objects of interest for quite a while now. Nevertheless, the direct assessment of their material properties is still afflicted with difficulties as their characteristic size causes various handling issues. Besides the electrical, magnetic, and optical behaviour, the mechanical properties of nanostructures are of special interest as these basically determine the possibility to use the structures in order to design mechanically stable devices. In this work carbon nitride nanobells (CNNBs) and carbon nitride fibers have been deposited by chemical vapour deposition (CVD) onto a silicon wafer. In a second step these structures have been electroplated with nickel, creating films of carbon/nickel core/shell structures. A series of samples with various nickel film thicknesses is available for electrical and mechanical testing. In a third step the carbon host structure is removed by hydrogen etching leaving behind pure nickel tubes. Both, individual carbon, carbon/nickel, and films/networks of these structures as well as single nickel tubes have been mechanically characterized by scanning nanoindentation and scanning probe microscopy. The complex results, which cover the mechanical response of the system on the nano- and micro-scale, will be correlated and discussed.