Shining insights: Deciphering the biogenic synthesis of Ajuga bracteosa-mediated gold nanoparticles with advanced microscopy techniques

文献类型： 外文期刊

第一作者： Afreen, Afshan

作者： Afreen, Afshan;Tariq, Muhammad;Ahmed, Rashid;Kousar, Momina Bint;Akram, Zeeshan;Hameed, Hajra;Sharif, Muhammad Shakeeb;Waheed, Abdul

作者机构：

关键词： advanced microscopy; Ajuga bracteosa; characterization; gold nanoparticles

期刊名称：MICROSCOPY RESEARCH AND TECHNIQUE （ 影响因子：2.5； 五年影响因子：2.5 ）

ISSN： 1059-910X

年卷期： 2024 年

页码：

收录情况： SCI

摘要： In this study, gold nanoparticles (AuNPs) were bioreduced from Ajuga bracteosa, a medicinal herb known for its therapeutic properties against various diseases. Different fractions of the plant extract were used, including the methanolic fraction (ABMF), the n-hexane fraction (ABHF), the chloroform fraction (ABCF), and the aqueous extract for AuNPs synthesis. The characterization of AuNPs was performed using UV-Vis spectrophotometry, FT-IR, XRD, EDX, and TEM. UV-Vis spectroscopy confirmed the formation of AuNPs, with peaks observed at 555 nm. FT-IR analysis indicated strong capping of phytochemicals on the surface of AuNPs, which was supported by higher total phenolic contents (TPC) and total flavonoid contents (TFC) in AuNPs. XRD results showed high crystallinity and a smaller size distribution of AuNPs. TEM analysis revealed the spherical shape of AuNPs, with an average size of 29 +/- 10 nm. The biologically synthesized AuNPs exhibited superior antibacterial, antioxidant, and cytotoxic activities compared to the plant extract fractions. The presence of active biomolecules in A. bracteosa, such as neoclerodan flavonol glycosides, diterpenoids, phytoecdysone, and iridoid glycosides, contributed to the enhanced biological activities of AuNPs. Overall, this research highlights the potential of A. bracteosa-derived AuNPs for various biomedical applications due to their remarkable therapeutic properties and effective capping by phytochemicals.

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