Figure 2From: Nanoparticles prepared from porous silicon nanowires for bio-imaging and sonodynamic therapyPhotoluminescence properties of SiNWs and SiNPs. (a) PL spectra of SiNW layers (inset: digital photo of silicon wafer structured by SiNWs with participating institution letters under UV excitation) and (b) PL spectra of aqueous suspensions of SiNPs prepared from SiNWs (inset: typical appearance of the SiNP suspension under the UV line of argon-laser radiation).Back to article page