Thermally Induced Shape Modification of Free-standing Nanostructures for Advanced Functionalities

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 microstructura...

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Published inScientific reports Vol. 3; no. 1; p. 2429
Main Authors Cui, Ajuan, Li, Wuxia, Shen, Tiehan H., Yao, Yuan, Fenton, J. C., Peng, Yong, Liu, Zhe, Zhang, Junwei, Gu, Changzhi
Format Journal Article
LanguageEnglish
Published London Nature Publishing Group UK 13.08.2013
Nature Publishing Group
Subjects
639/301/1005/1009
639/925/350/2093
639/925/357/1016
639/925/927/1007
Annealing
Asymmetry
Chemical vapor deposition
Construction
Crystallization - methods
Gases
Hardness
Heating - methods
Humanities and Social Sciences
Immobilization
Ion beams
Laboratories
Materials Testing
multidisciplinary
Nanotechnology
Nanowires
Nanowires - chemistry
Nanowires - ultrastructure
Particle Size
Physics
Science
Symmetry
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Summary: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 N 2 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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ISSN:2045-2322
2045-2322
DOI:10.1038/srep02429