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Carbon dots (CDs) were synthesized by the nitric acid oxidation of activated carbon. The experimental measurements showed that the resulting particles exhibited an average diameter of 50nm and tunable emission wavelength. The fluorescence intensity of CDs was effectively quenched by copper ion (Cu 2+ ) (turn-off) and restored reversibly by the addition of oxalate (turn-on). Based on this phenomenon,...
Luminescence carbon nanoparticles (CNPs) have been prepared by refluxing the combustion soot of kerosene in nitric acid, and this approach can be used for milligram-scale synthesis of water-soluble particles. These fluorescent CNPs were stable in water for more than 3months without fluorescence decreasing. Diameter of the water-soluble fluorescent CNPs obtained by scanning electron microscope was...
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