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Size-Induced Switching of Nanowire Growth Direction a New Approach Toward Kinked Nanostructures

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 In 2 O 3 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. © 2016 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim
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Submitted on : Tuesday, July 16, 2019 - 11:33:10 AM
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Y. Shen, O.I. Lebedev, S. Turner, G. van Tendeloo, X. Song, et al.. Size-Induced Switching of Nanowire Growth Direction a New Approach Toward Kinked Nanostructures. Advanced Functional Materials, Wiley, 2016, 26 (21), pp.3687-3695. ⟨10.1002/adfm.201600142⟩. ⟨hal-02184770⟩



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