Journal
NANOSCALE
Volume 10, Issue 23, Pages 11205-11210Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8nr00737c
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Funding
- Australian Research Council
- China Scholarship Council
- Australia National University
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We report on the effect of nitridation on GaN self-assembled nanorods grown on the c-plane sapphire by metalorganic chemical vapour deposition (MOCVD). Nitridation conditions are found to critically influence the nanorod morphology and optical properties. The nanorod polarity was determined through a direct observation of atomic dumbbell pairs. While purely N-polar wires are obtained under optimised nitridation, incomplete or missing nitridation leads to mixed polarity. By comparing the morphology and the crystal structure with spatially resolved cathodoluminescence results, our study unambiguously establishes a link between appropriate nitridation duration and a homogeneous improvement in optical quality.
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