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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Exploring Au Droplet Motion in Nanowire Growth: A Simple Route toward Asymmetric GaP Morphologies

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Author(s):
da Silva, Bruno C. [1] ; Oliveira, Douglas S. [1] ; Iikawa, Fernando [1] ; Couto, Jr., Odilon D. D. [1] ; Bettini, Jefferson [2] ; Zagonel, Luiz F. [1] ; Cotta, Monica A. [1]
Total Authors: 7
Affiliation:
[1] Univ Estadual Campinas, Inst Phys Gleb Wataghin, BR-13083859 Campinas, SP - Brazil
[2] Natl Ctr Res Energy & Mat, Brazilian Nanotechnol Natl Lab, CP 6192, BR-13083970 Campinas, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Nano Letters; v. 17, n. 12, p. 7274-7282, DEC 2017.
Web of Science Citations: 2
Abstract

Here we show a new nanowire growth procedure, exploring the thermally activated motion of Au droplets on III-V surfaces. We show that by setting a single growth parameter we can activate the crawling motion of Au droplets in vacuum and locally modify surface composition in order to enhance vapor solid (VS) growth along oxide-free areas on the trail of the metal particle. Asymmetric VS growth rates are comparable in magnitude to the vapor liquid solid growth, producing unconventional wurtzite GaP morphologies, which shows negligible defect density as well as optical signal in the green spectral region. Finally, we demonstrate that this effect can also be explored in different substrate compositions and orientations with the final shape finely tuned by group III flow and nanoparticle size. This distinct morphology for wurtzite GaP nanomaterials can be interesting for the design of nanophotonics devices. (AU)

FAPESP's process: 15/16611-4 - III-V semiconductor nanowires: synthesis studies for biology applications
Grantee:Mônica Alonso Cotta
Support type: Regular Research Grants
FAPESP's process: 12/10127-5 - Research and development of nanostructured materials for electronic and surface physics applications
Grantee:Fernando Alvarez
Support type: Research Projects - Thematic Grants
FAPESP's process: 12/11382-9 - Optical modulation of semiconductor nanostructures using surface acoustic waves
Grantee:Odilon Divino Damasceno Couto Júnior
Support type: Research Grants - Young Investigators Grants
FAPESP's process: 16/16365-6 - Nanostructures of III-V semiconductors and their optical properties
Grantee:Fernando Iikawa
Support type: Regular Research Grants
FAPESP's process: 14/23399-9 - Heterostructures in semiconducting nanowires: nanometric light emitters studied by scanning tunnelling microscopy
Grantee:Luiz Fernando Zagonel
Support type: Research Grants - Young Investigators Grants
FAPESP's process: 13/02300-1 - Semiconductor nanowires: formation mechanisms and biosensing applications
Grantee:Mônica Alonso Cotta
Support type: Regular Research Grants