Cui, A; Li, W; Shen, TH; Yao, Y; Fenton, JC; Peng, Y; Liu, Z; ... Gu, C; + view all Cui, A; Li, W; Shen, TH; Yao, Y; Fenton, JC; Peng, Y; Liu, Z; Zhang, J; Gu, C; - view fewer (2013) Thermally Induced Shape Modification of Free-standing Nanostructures for Advanced Functionalities. Scientific Reports , 3 , Article 2429. 10.1038/srep02429.

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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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