One-step fabrication and photoluminescence of aluminasheathed GaN nanowires

• Published in: Journal of ceramic processing research pp. 453 - 458
• Main Authors: 곽동섭, 권용정, 조홍연, 이종무
• Format: Journal Article
• Language: English
• Published: 청정에너지연구소 01.08.2013
• Subjects: 재료공학
• ISSN: 1229-9162; 2672-152X
• DOI: 10.36410/jcpr.2013.14.4.453

Gallium nitride (GaN)/alumina (Al2O3) core-shell structures were successfully synthesized by a simple and one-step thermal evaporation method. We characterized their morphology, microstructures, and optical properties by SEM, TEM, EDX, and photoluminescence (PL). The core-shell structures were comprised of a core of single crystalline, GaN nanowires surrounded by a shell of Al2O3 tubular structures. We proposed a base-growth process as the dominant mechanism for the growth of the core/shell nanowires. We have discussed the possible reason for the preferential formation of the Al2O3 shells on the outside of the core-shell structures. In regard to the core/shell structures, an emission peak of 3.3 eV was observed in the roomtemperature PL measurements in addition to the GaN-associated peaks, and was attributed to the Al2O3 shell. KCI Citation Count: 0