Biogenically proficient synthesis and characterization of silver nanoparticles employing marine procured fungi Aspergill
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ORIGINAL RESEARCH PAPER
Biogenically proficient synthesis and characterization of silver nanoparticles employing marine procured fungi Aspergillus brunneoviolaceus along with their antibacterial and antioxidative potency Harsh Mistry . Rashmi Thakor . Chirag Patil . Jitendra Trivedi . Himanshu Bariya
Received: 16 July 2020 / Accepted: 14 September 2020 Ó Springer Nature B.V. 2020
Abstract Objectives To assess the extracellular synthesis of silver nanoparticles using marine derived fungi Aspergillus brunneoviolaceus with their antibacterial and antioxidant activities. Results The biosynthesis of silver nanoparticles was estimated by the change in color from light yellow to dark brown within 36 h as the reaction progressed. UV-Visible spectroscopy exhibited its stability at 411 nm; ATR-FTIR spectroscopy depicted the functional group responsible for its production; X-Ray Diffraction denoted its crystalline FCC structure resembling the peaks in XRD pattern, corresponding to [111], [200], [220], [311] and [222] planes; TEM imaging revealed its spherical morphology with the particle size ranging from 0.72 to 15.21 nm and
Tauc’s plot analysis that disclosed its band gap energy as 2.44 eV that manifested the potential of AgNPs to be semiconductors. The characterization data henceforth, confirmed the efficient production of silver nanoparticles. The biosynthesized AgNPs expressed strong antibacterial activity against two Gram-positive and three Gram-negative bacteria. They also proved to possess higher antioxidative potentials by showing their potent radical scavenging activity against DPPH (2, 2-diphenyl-1-picrylhydrazyl). Conclusions The study unfolds the prospect for further utilization of this mycogenically synthesized AgNPs as antibacterial, antioxidative and anticancer agents.
H. Mistry R. Thakor C. Patil H. Bariya (&) Department of Life sciences, Hemchandracharya North Gujarat University, Patan, Gujarat 384265, India e-mail: [email protected] J. Trivedi Department of Biotechnology, Hemchandracharya North Gujarat University, Patan, Gujarat 384265, India
123
Biotechnol Lett
Graphic abstract
Keywords Aspergillus brunneoviolaceus Biosynthesis Silver nanoparticles Characterization Antibacterial and antioxidant activity
Introduction Synthesis of nanoparticles is often achieved by physical, chemical, and biological methods. The chemical method is most frequently used for the synthesis of silver nanoparticles (AgNPs) employing reagents that reduce silver ions and stabilize the nanoparticles. These reagents are toxic and may present risks to human health as well as the environment (Guilger-Casagrande and Lima 2019), which has drawn increasingly higher attention towards the green synthesis of AgNPs asanother alternative. Such methods enable the synthesis of nano-sized particles that show better physicochemical characteristics, ecofriendliness, cost-effectiveness and higher stability than chemical methods (Iravani et al. 2014). Biological methods involve t
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