Why does not observe for spesific peak for copper nanoparticle?

21 April 2021 0 6K Report

Copper nanoparticles were synthesized with copper sulfate and ascorbic acid. Starch was used as stabilizing agent. Solution changed to pink after autoclave but no observation peaks for cooper nanoparticle in the UV-Vis spectra. Is the color change of solution evidence of formation of nanoparticles? Why does not appear the specific peak of copper nanoparticle? Thank you..

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