Recently, Qu Songnan’s research group at the Changchun Institute of Optics and Mechanics of the Chinese Academy of Sciences broke through the problem of low luminous efficiency of carbon nanodots in the near-infrared band. For the first time, they developed carbon nanodots with highly efficient near-infrared absorption / luminescence characteristics, and realized a green laser pointer. In vivo near-infrared fluorescence imaging of carbon nanodots.
In recent years, Qu Songnan led the group to frequently publish articles in high-impact journals. Qu Songnan, who participated in the work in 2009, independently led a research group after working for several years, and was promoted to a researcher. Qu Songnan pointed out that luminescent carbon nanodots are emerging nano-luminescent materials, which have the advantages of small size (less than 20 nanometers), non-toxic, good light emitting performance, good biocompatibility, good light stability, wide raw materials, and easy modification The green laser pointer has caused widespread concern at home and abroad.
Earlier, research on luminescent inorganic semiconductor nanoparticles was very active, but inorganic semiconductor nanoparticles generally contain heavy metal cores (lead, cadmium), have a certain toxicity, and are also harmful to the environment, so scientists began to prepare new non-toxic compounds Of glowing nanoparticles.