Morphological engineering of self-assembled nanostructures at nanoscale on faceted GaAs nanowires by droplet epitaxy

Fabrication of advanced artificial nanomaterials is a long-term pursuit to fulfill the promises of nanomaterials and it is of utter importance to manipulate materials at nanoscale to meet urgent demands of nanostructures with designed properties. Herein, we demonstrate the morphological tailoring of...

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Bibliographic Details
Published in:Nanoscale research letters 2015, Vol.10 (1), p.11-11, Article 11
Main Authors: Zha, Guo-Wei, Zhang, Li-Chun, Yu, Ying, Xu, Jian-Xing, Wei, Si-Hang, Shang, Xiang-Jun, Ni, Hai-Qiao, Niu, Zhi-Chuan
Format: Article
Language:English
Subjects:
Chemistry and Materials Science
Droplets
Evolution
Gallium arsenide
Gallium arsenides
Materials Science
Molecular Medicine
Morphology
Nano Express
Nanochemistry
Nanomaterials
Nanoscale Science and Technology
Nanostructure
Nanotechnology
Nanotechnology and Microengineering
Nanowires
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Summary:Fabrication of advanced artificial nanomaterials is a long-term pursuit to fulfill the promises of nanomaterials and it is of utter importance to manipulate materials at nanoscale to meet urgent demands of nanostructures with designed properties. Herein, we demonstrate the morphological tailoring of self-assembled nanostructures on faceted GaAs nanowires (NWs). The NWs are deposited on different kinds of substrates. Triangular and hexagonal prism morphologies are obtained, and their corresponding {110} sidewalls act as platforms for the nucleation of gallium droplets (GDs). We demonstrate that the morphologies of the nanostructures depend not only on the annealing conditions but also on the morphologies of the NWs' sidewalls. Here, we achieve morphological engineering in the form of novel quantum dots (QDs), ‘square’ quantum rings (QRs), ‘rectangular’ QRs, 3D QRs, crescent-shaped QRs, and nano-antidots. The evolution mechanisms for the peculiar morphologies of both NWs and nanostructures are modeled and discussed in detail. This work shows the potential of combining nano-structural engineering with NWs to achieve multifunctional properties and applications.
ISSN:1931-7573
1556-276X
DOI:10.1186/s11671-014-0717-y