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. 2020 Dec 8;11(4):422–434. doi: 10.1016/j.jpha.2020.12.003

Fig. 2.

Fig. 2

(A) Development of a brown color solution with time, indicating the synthesis of silver nanoparticles (AgNPs). Time-dependent formation of AgNPs synthesized using (B) green tea (GT) extract, (C) (−)-epigallocatechin gallate (EGCG), and (D) (+)-catechin (Ct) as monitored from absorbance spectroscopy which displays an intense SPR peak at ∼420 nm.