Fig. 3. Synthesis of silver nanoparticles (AgNPs) by electron transfer in peptides. Scheme (1) Inhibited synthesis of AgNPs by photoinduced electron transfer in tetrapeptide 1/Ag⁺ solution. Scheme (2) AgNPs synthesis in tetrapeptide 2A–E/Ag⁺ solution by photoinduced electron transfer [this figure has been adapted from ref. 122 with permission from Wiley].