期刊
ADVANCED MATERIALS
卷 24, 期 41, 页码 5598-5603出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201202286
关键词
SiC; quantum rings; red spectral shift; carbide; photoluminescence
类别
资金
- National Institutes of Health [1DP2OD007209-01]
- National Science Foundation
- Air Force Office of Scientific Research (AFOSR)
- Penn State Center for Nanoscale Science (MRSEC)
- Natural Science Foundation of China [50831005]
- NSF
Beaded SiC quantum rings can be prepared by introducing a carbonization reaction at the laser-induced Si plasma and ethanol interface (referred to as reactive laser ablation). An anomalous red spectral shift is observed when the diameter of SiC nanocrystals within the SiC quantum rings is smaller than 3 nm. Experimental results and theoretical calculations indicate that the observed anomalous red spectral shift is ascribed to the contributions from surface structures (e. g., surface composition, surface reconstruction, and exposed crystal planes).
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