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<p>Mangrove plants, such as <i>Avicennia marina</i>, are rich in bioactive compounds and serve as eco-friendly sources for nanoparticle synthesis. In this study, chitosan-coated silver nanoparticles (AgNPs) were synthesized using <i>A. marina</i> leaf extract and characterized by UV–Vis spectroscopy, XRD, FESEM, EDAX, and FTIR. The nanoparticles were spherical, 15–43&#xa0;nm in size, and primarily composed of silver (73.77%). The antibacterial activity of chitosan-coated AgNPs was evaluated against multidrug-resistant pathogens, including <i>Staphylococcus aureus</i>, <i>Proteus vulgaris</i>, and <i>Klebsiella pneumoniae</i>, showing superior inhibition compared to uncoated AgNPs, with exhibited an inhibitory effect of 58.23% against <i>Klebsiella pneumoniae</i> and 55.67% against <i>Staphylococcus aureus</i>. In addition, these nanoparticles demonstrated significant antioxidant, ferrous ion chelation, and antibiofilm activities. These results indicate that chitosan-coated AgNPs possess multifunctional bioactive properties. Overall, the study highlights the potential of green-synthesized chitosan-coated AgNPs as eco-friendly candidates for biomedical applications, while underscoring the need for future in vivo and clinical investigations to confirm their translational relevance.</p>

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Green Synthesis of Chitosan Coated Silver Nanoparticles from Mangrove Plant of Avicennia marina Leaf Extract and Their Biomedical Applications

  • 期刊论文

  • 发表日期：

    2026年1月23日

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  • G. Anbarasi,
  • M. P. Arulmoorthy,
  • A. Selvapriya,
  • E. Kaarunya,
  • Sreelakshmy Venu,
  • C. Nayana,
  • C. M. Archana,
  • S. Kumaralingam

摘要

Mangrove plants, such as Avicennia marina, are rich in bioactive compounds and serve as eco-friendly sources for nanoparticle synthesis. In this study, chitosan-coated silver nanoparticles (AgNPs) were synthesized using A. marina leaf extract and characterized by UV–Vis spectroscopy, XRD, FESEM, EDAX, and FTIR. The nanoparticles were spherical, 15–43 nm in size, and primarily composed of silver (73.77%). The antibacterial activity of chitosan-coated AgNPs was evaluated against multidrug-resistant pathogens, including Staphylococcus aureus, Proteus vulgaris, and Klebsiella pneumoniae, showing superior inhibition compared to uncoated AgNPs, with exhibited an inhibitory effect of 58.23% against Klebsiella pneumoniae and 55.67% against Staphylococcus aureus. In addition, these nanoparticles demonstrated significant antioxidant, ferrous ion chelation, and antibiofilm activities. These results indicate that chitosan-coated AgNPs possess multifunctional bioactive properties. Overall, the study highlights the potential of green-synthesized chitosan-coated AgNPs as eco-friendly candidates for biomedical applications, while underscoring the need for future in vivo and clinical investigations to confirm their translational relevance.