Fig. 2From: Imaging of Biological Cells Using Luminescent Silver NanoparticlesPhotoluminescence and extinction spectra of silver nanoparticles in water. a The peak position of PL as the function of NP size. Blue dots correspond to PL emission peak; red dots correspond to optical density (extinction). b Extinction spectra. c Photoluminescence emission spectra of nanoparticles of different sizesBack to article page