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Size‐Induced Switching of Nanowire Growth Direction: a New Approach Toward Kinked Nanostructures |
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| Authors: | Youde Shen Oleg I Lebedev Stuart Turner Gustaaf Van Tendeloo Xiaohui Song Xuechao Yu Qijie Wang Hongyu Chen Shadi A Dayeh Tom Wu |
| Affiliation: | 1. Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, Singapore;2. Laboratoire CRISMAT, ENSICAEN, CNRS UMR 6508, 6 Boulevard du Maréchal Juin, Caen, France;3. EMAT, University of Antwerp, Groenenborgerlaan 171, Belgium;4. Division of Chemistry and Biological Chemistry, Nanyang Technological University, Singapore, Singapore;5. School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, Singapore;6. Department of Electrical and Computer Engineering, University of California San Diego, La Jolla, CA, USA;7. Materials Science and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia |
| Abstract: | Exploring self‐assembled nanostructures with controllable architectures has been a central theme in nanoscience and nanotechnology because of the tantalizing perspective of directly integrating such bottom‐up nanostructures into functional devices. Here, the growth of kinked single‐crystal In2O3 nanostructures consisting of a nanocone base and a nanowire tip with an epitaxial and defect‐free transition is demonstrated for the first time. By tailoring the growth conditions, a reliable switching of the growth direction from 111] to 110] or 112] is observed when the Au catalyst nanoparticles at the apexes of the nanocones shrink below ≈100 nm. The natural formation of kinked nanoarchitectures at constant growth pressures is related to the size‐dependent free energy that changes for different orientations of the nanowires. The results suggest that the mechanism of forming such kinked nanocone–nanowire nanostructures in well‐controlled growth environment may be universal for a wide range of functional materials. |
| Keywords: | In2O3 kinked nanostructures nanocones nanowires vapor– liquid– solid mechanism |
