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Plasmonic silver nanoparticles (AgNPs, size=3–50nm) were synthesized by biogenic reduction of aqueous AgNO3 using Trachyspermum ammi (TA, Ajwain) seeds extract. Increase in concentration of TA, accelerated the reduction rate of Ag+ and affected the AgNPs particle size. Pronounce effect of the AgNP's aging (24, 48 and 72h) on particle concentration/size and their corresponding catalytic activity, was...
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