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Química Nova

Print version ISSN 0100-4042On-line version ISSN 1678-7064

Abstract

VAZ, Roberto et al. PREPARATION OF CARBON DOTS AND THEIR OPTICAL CHARACTERIZATION: AN EXPERIMENT OF NANOSCIENCE FOR UNDERGRADUATE COURSE. Quím. Nova [online]. 2015, vol.38, n.10, pp.1366-1373. ISSN 1678-7064.  https://doi.org/10.5935/0100-4042.20150150.

Carbon dots (CDs) constitute a new class of carbon-based nanomaterials that measure less than 10 nm and display attractive physical and chemical features such as fluorescence. CDs have been considered the new “power” carbon nanomaterials since their accidental discovery in 2004. This study reports a simple, easy, and accessible experiment for undergraduate courses. The experiment involves the preparation of CDs by pyrolysis using commercial gelatin as a low cost precursor as well as CD purification and optical characterization. The optical properties of CDs such as absorption and emission properties make them a promising material for teaching the basic concepts and techniques used for characterization of nanomaterials. Also, the reactants and final product are suitable for undergraduate courses since they are non-toxic materials. The prepared CDs can be used in such applications as bioimaging, solar cells, and photocatalysis.

Keywords : education; experiment; nanomaterials; luminescence; carbon dot.

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