A solvent-engineered molecule fusion strategy for rational synthesis of carbon quantum dots with multicolor bandgap fluorescence

Solvent-controlled synthesis of multicolor photoluminescent carbon dots for bioimaging

“…The different absorptions of the four samples in the visible region imply different surface states. 6,40,51 Our CDs show excitation independence, in agreement with previously reported results. 49 The PL emission is independent of the excitation wavelength, within a certain range of excitation wavelengths (as shown in Fig.…”

“…16 Ding et al and Zhan et al synthesized multicolor uorescent CDs by using different solvents. 50,51 The solvothermal method is simple and the uorescence QYs are good. However, most of the raw materials are toxic, harmful, and environmentally unfriendly, and are potentially hazardous in practical applications.…”

Role of alkan-1-ol solvents in the synthesis of yellow luminescent carbon quantum dots (CQDs): van der Waals force-caused aggregation and agglomeration

“…Zhan et al revealed the importance of the solvent on the emission color and size control of CQDs produced from a 1,3,6-trinitropyrene carbon precursor. 29 Along similar lines, Ding and coworkers reported solvent-dependent multi-color CQDs using a solvothermal treatment. 18 The selection of an appropriate solvent in the synthesis of well-functionalized multi-color emitting CQDs is therefore important.…”

“…11 Since the discovery of CQDs in 2004, 12 various bottom-up synthetic protocols have been reported (e.g., carbonization, 13,14 ultrasonication, [15][16][17] solvothermal treatment, 3,[5][6][7]9,10,18,19 and microwave chemistry 8,20,21 ) from various carbon precursors (e.g., juice, 9,22 fruit peel, 23 vegetables, 9,24 paper, 20 organic acids and bases, [6][7][8]15,18,20,[25][26][27][28] and, not least, aromatic compounds 5,10,19,28,29 ). Technological improvements in the synthesis of multi-color emitting CQDs have been widely reported with respect to the solvent, 18,19,29 eluent, 28 surfactant, 27 dispersing agent, 10 and doping, 30 and these reports have sustained the recent progress in the synthesis of CQDs. In the solvothermal method, the selection of solvent plays a signicant role ...…”

Advances in fluorescent carbon dots for biomedical applications

“…Recently, Zhan et al [43]. demonstrated a new method for creating not only highly emissive red dots but also CQDs, which emit in the different ranges with relatively high QYs, namely 40% for emission in the red, 71.7 % for emission in the yellow, 26.7% for emission in the green and 27.5 % for emission in the blue.…”