Published in
Materials Research Society, Materials Research Society Symposium Proceedings, (1468), 2012
Cambridge University Press, Journal of Materials Research, 01(28), p. 44-49
DOI: 10.1557/jmr.2012.223
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- Cambridge University Press
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- [www.researchgate.net] | PDF
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Preparation of small silicon carbide quantum dots by wet chemical etching
,
M. Veres,
Zsolt-S. Szekrényes,
István Balogh,
L. K. Varga,
É. Fazakas,
Zsolt-S. Czigány ,
Katalin Kamarás,
Ádám Gali,
Adam Gali
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Abstract
Fabrication of nanosized silicon carbide (SiC) crystals is a crucial step in many biomedical applications. Here we report an effective fabrication method of SiC nanocrystals based on simple electroless wet chemical etching of crystalline cubic SiC. Comparing an open reaction system with a closed reaction chamber, we found that the latter produces smaller nanoparticles (less than 8 nm diameter) with higher yield. Our samples show strong violet-blue emission in the 410–450 nm region depending on the solvents used and the size. Infrared measurements unraveled that the surface of the fabricated nanoparticles is rich in oxidized carbon. This may open an opportunity to use standard chemistry methods for further biological functionalization of such nanoparticles.