Journal
CRYSTENGCOMM
Volume 12, Issue 10, Pages 2975-2981Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/b927384k
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Funding
- Specialized Research Fund for the Doctoral Program of Higher Education [20090162120008]
- China Postdoctoral Science Foundation [200801340, 20070420520]
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Arrays of single crystal germanium nanowires were fabricated in a self-assembled manner by a hydrothermal method without any metallic catalyst or templates. SEM, TEM, HRTEM, SAED, EDS, FTIR analyses show that the germanium nanowires are composed of a core of germanium and a very thin GeO2 shell, and have a smooth surface and straightforward body, uniform diameters, a rectangular growth sectional view, and a knife edge growth tip. In the growth process, the H+ and OH- play an important assistant role, a role of oxidation-reduction in the growth tip. PL shows that the germanium nanowires have intensive purple light emission at about 360 nm and 396 nm, which may be come from nano-size effect of GeNWs and the neutral oxygen vacancy, respectively.
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