In 2006, scientists at the University of Clermontson in the United States produced a type of carbon nanoparticle that emits bright light when illuminated. Scientists also found that green carbon pointers with luminescent carbon nanoparticles have unique advantages, such as chemical stability, no light flicker, light drift resistance, non-toxicity, cheaper manufacturing cost, and excellent biocompatibility.
In 2012, Qu Songnan, then an associate researcher at the Changchun Institute of Optics and Mechanics, found that the use of carbon nanoparticle excitation wavelength-dependent characteristics, combined with organic dyes, can build graphics with information encryption on biological products, which can be applied to Information storage and information encryption.
“These unique properties make it possible for carbon nanodots to enter our real life.” Qu Songnan told reporters, and then their team developed a new type of green laser pointer ink. “This ink can be applied to a variety of fields such as biological imaging, biological product identification, information storage, information encryption, anti-counterfeiting, lighting display, sensing, photovoltaic devices, etc.”