Figure 4From: Enhanced photoluminescence of porous silicon nanoparticles coated by bioresorbable polymersExamples 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.Back to article page