Abstract
This study describes an eco-friendly procedure to synthesize silver nanoparticles (AgNPs) using fresh and dried stem extract of Rheum ribes. AgNPs formation was confirmed using UV-vis spectrometry. The effects of parameters such as temperature, reaction time, pH, AgNO3 concentration, and plant extract/AgNO3 ratio on NP formation were evaluated. Morphology and structural features of the particles were characterized using SEM, TEM, XRD, and FTIR. The average size, polydispersity index, and zeta potential were determined using DLS. After characterization, among the two AgNP samples, selected one; AgNP sample synthesized by dried Rheum ribes stem extracts (d-AgNPs), which exhibited narrow size distribution and high surface plasmon resonance in the range of 435–445 nm for toxicity assessment. The cytotoxic effect of d-AgNPs on HUVECs cells was evaluated with MTT analysis. Accumulation measurements were made in three periods as 24, 48, and 72 h and elimination values were examined at +24 h using ICP-MS analysis
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