Abstract:

Bluish-green light-emitting fluorescence nanodots （FNDs） were prepared by aqueous polymerization in virtue of conjugated double bonds of conjugated linoleic acid （CLA）, indicative of an average particle size of 16 nm. The formation of the FNDs was conducted by polymerizing biomass small molecules in water at relatively low temperature, which was energy saving and safe compared with the reports of carbon dots （CDs） from other biomass carbon sources. This method was mainly based on the addition polymerization of the conjugated double bonds, indicative of good controllability for both reaction and particle size. The experimental results showed that, the FNDs had the optimal excitation wavelength of 320 nm; the excitation dependence would shift to partial excitation dependence when the degree of polymerization was increased; self-absorption had appeared as the concentration of carbon source was increased. Therefore, the study had theoretical and practical significance for the preparation of nanomaterials from natural fats and oils. The FNDs showed the potential of application in drugs and daily chemicals due to the green carbon source, the biocompatible product and the eco-friendly aqueous polymerization.

Key words: fluorescence nanodot, conjugated linoleic acid, fluorescent characteristics, aqueous polymerization