Carbon Quantum Dots: Synthesis, Properties and Applications by Raz Jelinek

By Raz Jelinek

This booklet introduces a number of the points of the rising box of carbon dots. Their structural and physico-chemical houses in addition to their present and destiny capability purposes are lined. a distinct bankruptcy on graphene quantum dots is supplied. The reader also will locate various synthesis routes for carbon quantum dots.

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Extra resources for Carbon Quantum Dots: Synthesis, Properties and Applications

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30]. Copyright (2012) American Chemical Society Fig. 24 Fabrication of graphene quantum dots using an array of gold nanoparticles and polymer micelles. a preparation of a graphene film; b an array of polymer micelle-coated Au nanoparticles (NPs) placed upon the film; c plasma etching removes the organic substances, leaving behind the Au NPs and graphene fragments underneath; d GQDs are produced after removal of the Au NPs. Adapted from Kim et al. [26] A combined “top-down” and “bottom-up” strategy for production of GQDs is outlined in Fig.

Fractionation of Carbon-Dots samples was used in other studies to obtain Carbon-Dots that exhibited distinct luminescence properties, shedding light on the parameters and mechanisms responsible for their excitation-dependent emission. L. A. Colon and colleagues at SUNY, Buffalo, for example, revealed that fractions collected upon passing an as-synthesized Carbon-Dots sample through a high-performance liquid chromatography (HPLC) column displayed different fluorescence profiles compared to the “parent” Carbon-Dots [7].

No excitation-dependent luminescence) could be synthesized through careful modification of the Carbon-Dots’ surface, thereby eliminating or reducing the concentrations of the “surface defects” responsible for the different energy levels. Modulation of the structural/functional properties of Carbon-Dots through chemical means has been a prominent research direction in the field, aimed at controlling the excitation-dependent emission profiles of Carbon-Dots. H. Lin and colleagues at the Ningbo Institute of Materials Technology and Engineering, China, for example, synthesized Carbon-Dots for which the emission spectra exhibited similar peak intensities even upon excitation in significantly different wavelengths [1] (Fig.

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