A Facile Preparation of Multicolor Carbon Dots

Abstract Carbon dots (CDs) were preparedby classic critic acid and thiourea as precursors, modulating the volume ratio of solvent that is water and DMF under one-pot solvothermal reaction to prepared colortunable CDs with emissive wavelength from 450 nm to 640 nm. The distinct optical features of these CDs are basis with their differences in the particle size, and the content of the C-N/C-S and -C≡N, which can be adjusted by controlling the decomposed and carbonization processes during solvothermal reaction.Furthermore, the CDs have significantly potential to be achievedcontinuous luminescence emitting spectrum by modulating minor distinction which control the ratio of solvent, solvothermal reaction time and temperature. Therefore, the study achieved an efficient approach to tune the color and photoluminescence mechanism of CDs, promote the potential applications in biological and anti-counterfeiting inks.