Examples of PL spectra. PL spectra of uncoated (blue line) and coated (red line) samples before (solid lines) and after (dashed lines) 4 days storage. Inset shows photograph of aqueous suspensions of coated and uncoated PSiNPs under UV irradiation just after the preparation.
Gongalsky et al. Nanoscale Research Letters 2012 7:446 doi:10.1186/1556-276X-7-446