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Table 2 Photoluminescence properties of the NPs

From: Density of surface charge is a more predictive factor of the toxicity of cationic carbon nanoparticles than zeta potential

  λmax (nm) ε m (L g− 1 cm− 1) λex (nm) λem (nm)
NP1 336 1.31 351 437
NP2 350 1.89 421 501
NP3 350 8.80 522 512
NP4 354 2.54 425 460
NP5 354 2.32 368 462
NP6 361 0.14 425 444