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The current study investigated ecofriendly synthesis of silver nanoparticles from red seaweed- Gracilaria gracilis (Gg-Ag-NPs). Several synthesis methods were explored, including sunlight irradiation, UV irradiation, direct boiling, and room temperature reactions. Sunlight irradiation with a 10:1 ratio of silver nitrate solution to Gracilaria gracilis extract was the most efficient method, resulting in rapid color change indicative of nanoparticle formation. Followed by the phytochemical screening of extract, the Gg-Ag-NPs were distinguished by UV-Vis spectrophotometry, confirming presence of stable nanoparticles with absorbance peak at 410 nm. Scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) analysis were employed to further characterize size, morphology and composition of the nanoparticles. FTIR analysis indicated the presence of phytochemicals in the samples, suggesting their role in stabilization and reduction of silver ions. This research demonstrates the capabilities of Gracilaria gracilis extract as a green source for silver nanoparticle synthesis with diverse applications with efficient antimicrobial therapy.

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Silver Nanoparticle Materials from Gracilaria gracilis: A Promising Tool for Antimicrobial and Optical Application

  • 会议论文

  • 发表日期：

    2026年

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  • Balamurugan Sudharsun,
  • Sundaravel Mahavishnu,
  • Bhathini Vaikuntavasan Pradeep,
  • Kailasam Saravana Mani,
  • Paulraj Balaji,
  • Tamilselvan Amutha Gokul,
  • Kamatchi Ramesh Kumar,
  • Veeramani Veeramanikandan

摘要

The current study investigated ecofriendly synthesis of silver nanoparticles from red seaweed- Gracilaria gracilis (Gg-Ag-NPs). Several synthesis methods were explored, including sunlight irradiation, UV irradiation, direct boiling, and room temperature reactions. Sunlight irradiation with a 10:1 ratio of silver nitrate solution to Gracilaria gracilis extract was the most efficient method, resulting in rapid color change indicative of nanoparticle formation. Followed by the phytochemical screening of extract, the Gg-Ag-NPs were distinguished by UV-Vis spectrophotometry, confirming presence of stable nanoparticles with absorbance peak at 410 nm. Scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) analysis were employed to further characterize size, morphology and composition of the nanoparticles. FTIR analysis indicated the presence of phytochemicals in the samples, suggesting their role in stabilization and reduction of silver ions. This research demonstrates the capabilities of Gracilaria gracilis extract as a green source for silver nanoparticle synthesis with diverse applications with efficient antimicrobial therapy.