Synthesis of gold nanowires with controlled crystallographic characteristics |
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Authors: | S Karim ME Toimil-Molares F Maurer G Miehe W Ensinger J Liu TW Cornelius R Neumann |
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Institution: | (1) Department of Chemistry, Philipps University, Marburg, Germany;(2) Gesellschaft für Schwerionenforschung (GSI), Darmstadt, Germany;(3) Institute of Materials Science, Darmstadt University of Technology, Darmstadt, Germany;(4) Institute of Modern Physics, Chinese Academy of Sciences (CAS), Lanzhou, P.R. China |
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Abstract: | The controlled fabrication of poly- and single-crystalline Au nanowires is reported. In polycarbonate templates, prepared by heavy-ion irradiation and subsequent etching, Au nanowires with diameters down to 25 nm are electrochemically synthesized. Four-circle X-ray diffraction and transmission electron microscopy measurements demonstrate that wires deposited potentiostatically at a voltage of -1.2 V at 65 °C are single-crystalline and oriented along the 110] direction. By reverse-pulse electrodeposition, wires oriented along the 100] direction are grown. The wires are cylindrical over their whole length. The morphology of the caps growing on top of poly- and single-crystalline wires is a strong indication of the particular crystalline structure of the nanowires. PACS 61.46.-w; 81.07.-b |
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