Figure 2From: Surface enhanced fluorescence of anti-tumoral drug emodin adsorbed on silver nanoparticles and loaded on porous siliconSEM images of the cross-section of three of the samples analyzed. (a) Sample I (Em/Ag/MeOH), (b) sample II (Em/Ag/H2O), and (c) sample III (Em-BSA/Ag/H2O). In all cases pore size is 60 nm.Back to article page