Au-Sn Catalyzed Growth of Ge<sub>1-<i>x</i></sub>Sn<sub><i>x</i></sub> Nanowires: Growth Direction, Crystallinity, and Sn Incorporation.
basic_science · Level V
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- Record sourced from PubMed, PMID 31448621.
- Also identified by DOI 10.1021/acs.nanolett.9b02395.
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Abstract
Ge<sub>1-<i>x</i></sub>Sn<sub><i>x</i></sub> nanowires (NWs) have been a focus of research attention for their potential in realizing next-generation Si-compatible electronic and optoelectronic devices. To control the growth of NWs and increase their Sn content, the growth mechanism needs to be understood. The use of Au-Sn alloy catalysts instead of Au catalysts allows an easier understanding of Ge<sub>1-<i>x</i></sub>Sn<sub><i>x</i></sub> NW growth, and the effects of Sn at different concentrations in catalysts on growth direction, Sn incorporation, and crystallinity of Ge<sub>1-<i>x</i></sub>Sn<sub><i>x</i></sub> NWs can be clarified. High Sn content in Au-Sn alloy catalysts favors ⟨110⟩-oriented NW growth and high Sn incorporation in NWs. The higher Sn content in Au-Sn alloy catalysts also improves the crystallinity of NWs.