Figure 4.

Excitation and emission spectra of aqueous solutions of (left) fluorescein and silica nanoparticles doped with fluorescein 1 h, and (right) rhodamine B and silica nanoparticles doped with rhodamine B 1g.

Auger et al. Nanoscale Research Letters 2011 6:328   doi:10.1186/1556-276X-6-328
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