Biogenic silver nanoparticles: efficient and effective antifungal agents
Autor: | Vasudeva Reddy Netala, Venkata Subbaiah Kotakadi, Susmila Aparna Gaddam, Pushpalatha Bobbu, Vijaya Tartte, Latha Domdi, Sukhendu Bikash Ghosh, Sucharitha K. Venkata |
---|---|
Rok vydání: | 2015 |
Předmět: |
Materials science
Materials Science (miscellaneous) Analytical chemistry Nanochemistry 02 engineering and technology 010402 general chemistry 01 natural sciences Silver nanoparticle chemistry.chemical_compound Zeta potential Electrical and Electronic Engineering Physical and Theoretical Chemistry Fourier transform infrared spectroscopy Surface plasmon resonance biology Cell Biology 021001 nanoscience & nanotechnology biology.organism_classification Atomic and Molecular Physics and Optics 0104 chemical sciences Silver nitrate chemistry Gymnema sylvestre Selected area diffraction 0210 nano-technology Biotechnology Nuclear chemistry |
Zdroj: | Applied Nanoscience. 6:475-484 |
ISSN: | 2190-5517 2190-5509 |
Popis: | Biogenic synthesis of silver nanoparticles (AgNPs) by exploiting various plant materials is an emerging field and considered green nanotechnology as it involves simple, cost effective and ecofriendly procedure. In the present study AgNPs were successfully synthesized using aqueous callus extract of Gymnema sylvestre. The aqueous callus extract treated with 1nM silver nitrate solution resulted in the formation of AgNPs and the surface plasmon resonance (SPR) of the formed AgNPs showed a peak at 437 nm in the UV Visible spectrum. The synthesized AgNPs were characterized using Fourier transform infrared spectroscopy (FTIR), Transmission electron microscopy (TEM), and X-ray diffraction spectroscopy (XRD). FTIR spectra showed the peaks at 3333, 2928, 2361, 1600, 1357 and 1028 cm−1 which revealed the role of different functional groups possibly involved in the synthesis and stabilization of AgNPs. TEM micrograph clearly revealed the size of the AgNPs to be in the range of 3–30 nm with spherical shape and poly-dispersed nature; it is further confirmed by Particle size analysis that the stability of AgNPs is due its high negative Zeta potential (−36.1 mV). XRD pattern revealed the crystal nature of the AgNPs by showing the braggs peaks corresponding to (111), (200), (220) and (311) planes of face-centered cubic crystal phase of silver. Selected area electron diffraction pattern showed diffraction rings and confirmed the crystalline nature of synthesized AgNPs. The synthesized AgNPs exhibited effective antifungal activity against Candida albicans, Candida nonalbicans and Candida tropicalis. |
Databáze: | OpenAIRE |
Externí odkaz: |