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Article

Growth Mechanism of SmB6 Nanowires Synthesized by Chemical Vapor Deposition: Catalyst-Assisted and Catalyst-Free

Beijing Key Laboratory of Quantum Devices, Key Laboratory for the Physics and Chemistry of Nanodevices, and Department of Electronics, Peking University, Beijing 100871, China
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Author to whom correspondence should be addressed.
Nanomaterials 2019, 9(8), 1062; https://doi.org/10.3390/nano9081062
Received: 3 July 2019 / Revised: 18 July 2019 / Accepted: 19 July 2019 / Published: 24 July 2019
(This article belongs to the Special Issue Nanotechnologies and Nanomaterials: Selected Papers from CCMR 2019)
SmB6 nanowires, as a prototype of nanostructured topological Kondo insulator, have shown rich novel physical phenomena relating to their surface. Catalyst-assisted chemical vapor deposition (CVD) is a common approach to prepare SmB6 nanowires and Ni is the most popular catalyst used to initiate the growth of SmB6 nanowires. Here, we study the effect of growth mechanism on the surface of SmB6 nanowires synthesized by CVD. Two types of SmB6 nanowires are obtained when using Ni as the catalyst. In addition to pure SmB6 nanowires without Ni impurity, a small amount of Ni is detected on the surface of some SmB6 nanowires by element analysis with transmission electron microscopy. In order to eliminate the possible distribution of Ni on nanowire surface, we synthesize single crystalline SmB6 nanowires by CVD without using catalyst. The difference between catalyst-assisted and catalyst-free growth mechanism is discussed. View Full-Text
Keywords: nanowires; synthesis; CVD; topological insulators; growth mechanism nanowires; synthesis; CVD; topological insulators; growth mechanism
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MDPI and ACS Style

Chu, Y.; Cui, Y.; Huang, S.; Xing, Y.; Xu, H. Growth Mechanism of SmB6 Nanowires Synthesized by Chemical Vapor Deposition: Catalyst-Assisted and Catalyst-Free. Nanomaterials 2019, 9, 1062. https://doi.org/10.3390/nano9081062

AMA Style

Chu Y, Cui Y, Huang S, Xing Y, Xu H. Growth Mechanism of SmB6 Nanowires Synthesized by Chemical Vapor Deposition: Catalyst-Assisted and Catalyst-Free. Nanomaterials. 2019; 9(8):1062. https://doi.org/10.3390/nano9081062

Chicago/Turabian Style

Chu, Yi; Cui, Yugui; Huang, Shaoyun; Xing, Yingjie; Xu, Hongqi. 2019. "Growth Mechanism of SmB6 Nanowires Synthesized by Chemical Vapor Deposition: Catalyst-Assisted and Catalyst-Free" Nanomaterials 9, no. 8: 1062. https://doi.org/10.3390/nano9081062

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