Journal
ADVANCED MATERIALS
Volume 24, Issue 41, Pages 5598-5603Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201202286
Keywords
SiC; quantum rings; red spectral shift; carbide; photoluminescence
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Funding
- 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
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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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