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

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Institute of Physics“Gleb Wataghin”, University of Campinas, 13083-859 Campinas, São Paulo, Brazil
Brazilian Nanotechnology National Laboratory, National Center for Research in Energy and Materials, C P 6192, 13083-970 Campinas, São Paulo, Brazil
Cite this: Nano Lett. 2017, 17, 12, 7274–7282
Publication Date (Web):November 7, 2017
https://doi.org/10.1021/acs.nanolett.7b02770
Copyright © 2017 American Chemical Society

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    Abstract

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    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.

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    The Supporting Information is available free of charge on the ACS Publications website at DOI: 10.1021/acs.nanolett.7b02770.

    • Additional SEM, TEM, and AFM images of the samples, statistical analysis about the axial growth rate, and the populations present in each sample and optical measurements (PDF)

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    Cited By

    This article is cited by 5 publications.

    1. Bruno César da Silva, Odilon Divino Damasceno Couto, Jr., Hélio Obata, Carlos Alberto Senna, Braulio Soares Archanjo, Fernando Iikawa, Mônica Alonso Cotta. Wurtzite Gallium Phosphide via Chemical Beam Epitaxy: Impurity-Related Luminescence vs Growth Conditions. ACS Omega 2022, 7 (48) , 44199-44206. https://doi.org/10.1021/acsomega.2c05666
    2. Chuancheng Jia, Zhaoyang Lin, Yu Huang, Xiangfeng Duan. Nanowire Electronics: From Nanoscale to Macroscale. Chemical Reviews 2019, 119 (15) , 9074-9135. https://doi.org/10.1021/acs.chemrev.9b00164
    3. Bruno C. da Silva, Odilon D. D. Couto, Hélio T. Obata, Mauricio M. de Lima, Fábio D. Bonani, Caio E. de Oliveira, Guilherme M. Sipahi, Fernando Iikawa, Mônica A. Cotta. Optical Absorption Exhibits Pseudo-Direct Band Gap of Wurtzite Gallium Phosphide. Scientific Reports 2020, 10 (1) https://doi.org/10.1038/s41598-020-64809-4
    4. B. R. Jany, A. Janas, W. Piskorz, K. Szajna, A. Kryshtal, G. Cempura, P. Indyka, A. Kruk, A. Czyrska-Filemonowicz, F. Krok. Towards the understanding of the gold interaction with AIII-BV semiconductors at the atomic level. Nanoscale 2020, 12 (16) , 9067-9081. https://doi.org/10.1039/C9NR10256F
    5. Carina B Maliakkal, Mahesh Gokhale, Jayesh Parmar, Rudheer D Bapat, Bhagyashree A Chalke, Sandip Ghosh, Arnab Bhattacharya. Growth, structural and optical characterization of wurtzite GaP nanowires. Nanotechnology 2019, 30 (25) , 254002. https://doi.org/10.1088/1361-6528/ab0a46

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