Title: Polysaccharide capped antibacterial silver nanoparticles synthesis using green chemistry

Authors: Joy Sarkar; Gajendra Nath Maity; Somanjana Khatua; Soumitra Mondal; Krishnendu Acharya

Addresses: Department of Botany, Dinabandhu Andrews College, Garia, Kolkata, West Bengal, Pin-700084, India; Molecular and Applied Mycology and Plant Pathology Laboratory, Centre of Advanced Study, Department of Botany, University of Calcutta, Kolkata, West Bengal, Pin-700019, India ' Department of Microbiology, Panskura Banamali College, Panskura R.S., Purba Medinipur, West Bengal, Pin-721152, India; Department of Microbiology, Asutosh College, Shyamaprasad Mukherjee Road, Kolkata, West Bengal, Pin-700026, India ' Molecular and Applied Mycology and Plant Pathology Laboratory, Centre of Advanced Study, Department of Botany, University of Calcutta, Kolkata, West Bengal, Pin-700019, India; Department of Botany, Krishnagar Government College, Krishnagar, Nadia, West Bengal, Pin-741101, India ' Department of Chemistry, Panskura Banamali College, Panskura R.S., Purba Medinipur, West Bengal, Pin-721152, India ' Molecular and Applied Mycology and Plant Pathology Laboratory, Centre of Advanced Study, Department of Botany, University of Calcutta, Kolkata, West Bengal, Pin-700019, India; Center for Research in Nanoscience & Nanotechnology, Technology Campus, University of Calcutta, Kolkata, West Bengal, Pin-700098, India

Abstract: Advancement of an environment friendly, trustworthy, and speedy route for the production of Ag-NP using natural system is an essential urge in nanotechnology. Biological synthetic techniques are considered as a better alternative over other conventional methods. Silver is a safe inorganic element that is projected as 'next-gen' antimicrobial agent and had been extensively used against several bacterial strains from the ancient times. Here, we document a low-cost green synthesis approach for construction of Ag-NP using fruit extracted polysaccharide of Bruguiera cylindrica, a mangrove plant of Sundarban. During the investigation of GC-MS an adequate amount of glucose was found as major carbohydrate molecule in the extracted polysaccharide. Synthesised Ag-NP were also characteristically described by UV-Vis, DLS, TEM, EDAX, XRD and FTIR. The average diameter of the Ag-NP was 4.5 ± 1 nm. Additionally, antibacterial nature of Ag-NP was also find out against some of the pathogenic gram-positive and gram-negative bacteria.

Keywords: green synthesis; Bruguiera cylindrica; polysaccharide; silver nanoparticle; bacterial growth.

DOI: 10.1504/IJNBM.2020.107417

International Journal of Nano and Biomaterials, 2020 Vol.9 No.1/2, pp.80 - 94

Received: 17 Feb 2019
Accepted: 14 Oct 2019
Published online: 27 May 2020 *