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

Youde Shen, Oleg I. Lebedev, Stuart Turner, Gustaaf Van Tendeloo, Xiaohui Song, Xuechao Yu, Qijie Wang, Hongyu Chen, Shadi A. Dayeh, Tao Wu

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

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. © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Original languageEnglish (US)
Pages (from-to)3687-3695
Number of pages9
JournalAdvanced Functional Materials
Volume26
Issue number21
DOIs
StatePublished - Apr 25 2016

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