Abstract
Plant mediated synthesis of metallic nanoparticles is an increasing commercial demand due to the wide applicability in various areas such as electronics, catalysis, chemistry, energy, cosmetics and medicine. This is greatly due to their special features, which include unusual optical and electronic properties, high stability and biological compatibility, controllable morphology and size dispersion, and easy surface functionalization. In the present investigation, synthesis of gold nanoparticle is done by using leaf extracts of Evolvulus alsinoides. Gold nanoparticles (AuNPs) were characterized by using UV visible absorption spectra. Their morphology, elemental composition and crystalline phase were determined by scanning electron microscopy, energy dispersive X-ray spectroscopy and FT-IR analysis was used to confirm the presence of gold nanoparticles in the extracts. The plant derived gold nanoparticles were also showing more inhibition activity in both bacterial and fungus strains. In bacteria, gram negative strains are highly affected by the test samples than gram positive. In fungal strains, the highest effect was noticed in Trichophyton rubrum while less effect was observed in Candida albicans.
Highlights
The terrestrial and watery ecosystem provide many bioactive compounds but which could be loss their potential against microorganisms due to the antibiotic resistance [1]
The biosynthetic method employing plant extracts has received attention as being simple, ecofriendly and economically viable compared to the microbial systems like bacteria and fungi because of their pathogenecity, and the chemical and physical methods used for synthesis of metal nanoparticles [6]
Green synthesized AuNPs were confirmed by analysing the excitation due to the applied electromagnetic field of surface plasmon resonance (SPR) using UV–vis spectrophotometer at 540 nm and the peak was observed between 535-550 nm
Summary
The terrestrial and watery ecosystem provide many bioactive compounds but which could be loss their potential against microorganisms due to the antibiotic resistance [1]. The biosynthetic method employing plant extracts has received attention as being simple, ecofriendly and economically viable compared to the microbial systems like bacteria and fungi because of their pathogenecity, and the chemical and physical methods used for synthesis of metal nanoparticles [6]. It does not require elaborate processes such as intracellular synthesis and multiple purification steps or the maintenance of microbial cell cultures [7]. Several plants and their parts have been successfully used for the extracellular synthesis of metal nanoparticles [8][9]
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