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Photoluminescence Spectroscopy of Carbon Dots

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Photoluminescence Spectroscopy of Carbon Dots

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  • Author: Maria Tesa
Carbon dots (C-dots) are nanoparticles composed of carbon with diameters below 10 nm. They were accidentally discovered in 2004 by Xu, et al when researching methods to purify carbon nanotubes. Since their discovery they have received much attention from the Materials Science community as a potential alternative to semiconductor quantum dots, especially in biological applications due to their low toxicity. Some of their applications include photocatalysis, solar cells, bioimaging and drug delivery. C-dots are composed of a mixture of sp2 and sp3 -hybridised carbon atoms and functional groups such as –COOH, -NH2 , and –OH. They can be synthesised by “top down” (starting from sp2 carbon materials such as graphite), or “bottom up” (carbonisation of small molecules) approaches.

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