Luminescence of Carbon Dots induced by MeV protons

Optical image of the PLA set up when the UV lamp illuminated the solid charcoal target.  Picture of the lines at the Tandetron Lab, at NPI (Rez, Czech Republic).  Vacuum chamber (a) and holder target (b).  Optical image of cuvettes filled with PBS and CDs suspensions when they are illuminated by conventional white light (a), UV lamp (b), and optical luminescence spectrum (c). 

AFM images of CDs (a) and CNT (b) contained in the suspension prepared by laser ablation. data set for 

Background optical spectra of the Al substrate irradiated by UV for 10 s (a) and 100 s (b); 

Optical spectra of CDs suspension deposited on Al substrate and irradiated by 2.0 MeV proton beams for 10 s (a), 20 s (b), and 30 s (c).; Luminescence yields relative to the bands centered at 480 nm and ranging between 514 and 642 nm as a function of the proton irradiation times.;

Optical spectra of background (a) and of the CDs suspension deposited on Al substrate and irradiated by 800 keV proton beams for 10 s (b), 20 s (c), and 30 s (d).; 

Luminescence yields relative to the bands centered at 480 nm and ranging between 514 and 642 nm as a function of the proton energy and irradiation times.