I supervised one undergraduate student investigating the synthesis of AgNPs using extracts of Piper betle leaves as reducing/capping agents. The UV-vis spectra turned out as depicted in the attached file.
Is the graph typical of UV spectra for silver NPs, especially for concentrated solutions of the precursors, i.e. the AgNO3 soln? (PS.: the particles obtained were agglomerated).
Thank you for your info.