Preparation of small silicon carbide quantum dots by wet chemical etching

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 rea...

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Bibliographic Details
Published in:Journal of materials research 2013-01, Vol.28 (1), p.44-49
Main Authors: Beke, David, Szekrényes, Zsolt, Balogh, István, Czigány, Zsolt, Kamarás, Katalin, Gali, Adam
Format: Article
Language:English
Subjects:
Acids
Applied and Technical Physics
Biomarkers
Biomaterials
Cadmium selenide
Etching
Fourier transforms
Heat resistance
Inorganic Chemistry
Materials Engineering
Materials research
Materials Science
Microelectromechanical systems
Nanocrystals
Nanoparticles
Nanotechnology
Open systems
Quantum dots
Silicon carbide
Spectrum analysis
Studies
Toxicity
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Summary: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.
ISSN:0884-2914
2044-5326
DOI:10.1557/jmr.2012.223