Size‐Induced Switching of Nanowire Growth Direction: a New Approach Toward Kinked Nanostructures
Source abstract
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.
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Research context
OpenAlex topics: ZnO doping and properties · Nanowire Synthesis and Applications · Gas Sensing Nanomaterials and Sensors
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Division of Physics and Applied Physics School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
Laboratoire CRISMAT ENSICAEN CNRS UMR 6508 6 Boulevard du Maréchal Juin 14050 Caen France
EMAT University of Antwerp Groenenborgerlaan 171 B‐2020 Antwerpen Belgium
Division of Chemistry and Biological Chemistry Nanyang Technological University Singapore 637371 Singapore
School of Electrical and Electronic Engineering Nanyang Technological University 50 Nanyang Ave. Singapore 639798 Singapore
Department of Electrical and Computer Engineering University of California San Diego La Jolla CA 92093 USA
Materials Science and Engineering King Abdullah University of Science and Technology (KAUST) Thuwal 23955 Saudi Arabia
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