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Publication Detail
Thermally Induced Shape Modification of Free-standing Nanostructures for Advanced Functionalities
  • Publication Type:
    Journal article
  • Publication Sub Type:
    Article
  • Authors:
    Cui A, Li W, Shen TH, Yao Y, Fenton JC, Peng Y, Liu Z, Zhang J, Gu C
  • Publication date:
    13/08/2013
  • Journal:
    Scientific Reports
  • Volume:
    3
  • Addresses:
    Beijing National Laboratory of Condensed Matter Physics
    Chinese Academy of Sciences
    Institute of Physics
    Beijing
    100190
    China

    Joule Physics Laboratory
    University of Salford
    Manchester
    M5 4WT
    UK

    London Centre for Nanotechnology
    University College London
    London
    WC1H 0AH
    UK

    The Key Laboratory of Magnetism and Magnetic Materials of Ministry of Education
    Lanzhou University
    Lanzhou
    730000
    P. R. China
Abstract
Shape manipulation of nanowires is highly desirable in the construction of nanostructures, in producing free-standing interconnect bridges and as a building block of more complex functional structures. By introducing asymmetry in growth parameters, which may result in compositional or microstructural non-uniformity in the nanowires, thermal annealing can be used to induce shape modification of free-standing nanowires. We demonstrate that such manipulation is readily achieved using vertically grown Pt-Ga-C composite nanowires fabricated by focused-ion-beam induced chemical vapor deposition. Even and controllable bending of the nanowires has been observed after a rapid thermal annealing in a N2 atmosphere. The mechanisms of the shape modification have been examined. This approach has been used to form electrical contacts to freestanding nano-objects as well as nano-‘cages’ for the purpose of securing ZnO tubs. These results suggest that thermally induced bending of nanowires may have potential applications in constructing three-dimensional nanodevices or complex structures for the immobilization of particles and large molecules.
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