It has been brought to light by a reader that Figure 4 (FT-IR spectrum) in this article appears to be identical to Figure 5 published by a largely overlapping author group (Kumar et al., 2023, https://doi.org/10.1186/s12906-023-03982-1). In that paper, the spectrum is presented as data from silver nanoparticles synthesized using Viscum orientale leaf extract, while here it is claimed to be from nanoparticles synthesized using Salacia oblonga root extract. The duplication of what is purported to be unique spectroscopic data from two entirely different biological sources is a serious breach of research ethics and irreparably damages the credibility of both publications.
Here are both Figures in two difference publications.