Analysis of size-dependent optical properties of lysine carbon dots produced by femtosecond laser synthesis

Pulsed laser synthesis of fluorescent nanoparticles from amino acids is promising technique for fluorescent imaging. Understanding relation between nanoparticle size and absorption and fluorescence characteristics sheds light on mechanism of fluorescence and enables control of optical properties of products. To study this relation, we separated products obtained by laser synthesis from L-lysine into fractions of different size and analyzed optical properties and chemical composition of these fractions.