Berlin 2012 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 35: Poster Session II (Polymeric biomolecular films; Nanostructures; Electronic structure; Spin-orbit interaction; Phase transitions; Surface chemical reactions; Heterogeneous catalysis; Particles and clusters; Surface magnetism; Electron and spin dynamics; Surface dynamics; Methods; Electronic structure theory; Functional molecules)
O 35.22: Poster
Dienstag, 27. März 2012, 18:15–21:45, Poster B
Fabrication and the characterization of the electrical, optical and field emission properties of regular ZnO and PbSe nanowires arrays — •Yaoguo Fang1,2, Kin Mun Wong1,2, André Devaux3, Liaoyong Wen1,2, Luisa De Cola3, and Yong Lei1,2 — 1Fachgebiet 3D-Nanostrukturierung, Institut für Physik & Zentrum für Mikro- und Nanotechnologien (ZIK MacroNano), Technische Universität Ilmenau, 98693 Ilmenau, Germany. — 2Institut für Materialphysik, Westfälische Wilhelms-Universität Münster, 48149 Münster, Germany. — 3Physikalisches Institut, Westfälische Wilhelms-Universität, 48149 Münster, Germany.
ZnO nanowires (NWs) and nanostructures of different length and shape were fabricated on silicon substrates by different methods such as chemical vapour deposition (CVD), hydrothermal or by chemical etching of the NWs grown by the CVD process. Well aligned ZnO NWs arrays of different length and size could be obtained by the CVD method and the shape of the NWs could be modified by chemical etching which produces needlelike ZnO NWs arrays. Conversely, doping the ZnO NWs with indium produces leaf-like ZnO nanostructures. With the use of the dry contact printing method, the regular and long ZnO NWs arrays could be used for the realizations of the NWs in Schottky device applications. In addition, the electrical, optical, stoichiometric, doping concentrations, field emission as well as the defect properties of the different morphologies of the ZnO nanostructures were obtained by a number of different spectroscopic techniques. On the other hand, p-PbSe nanowire arrays have also been fabricated and characterized.