Green synthesis of silver nanoparticles using marine polysaccharide: Study of in-vitro antibacterial activity

Venkatpurwar, Vinod; Pokharkar, Varsha

doi:10.1016/j.matlet.2010.12.057

Cited by 208 publications

(82 citation statements)

References 29 publications

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“…These AgNPs were highly constant at broad pH range (2-10) and showed effective antibacterial activity against Gram-negative than Gram-positive bacteria. 167 El-Rafie et al extracted water-soluble polysaccharides from aquatic microalgae. These polysaccharides were used as both reducing and stabilizing agents for AgNPs formation.…”

Section: Algaementioning

confidence: 99%

Nanosilver: new ageless and versatile biomedical therapeutic scaffold

Khan¹,

Saleh²,

Wahab³

et al. 2018

IJN

170

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Silver nanotechnology has received tremendous attention in recent years, owing to its wide range of applications in various fields and its intrinsic therapeutic properties. In this review, an attempt is made to critically evaluate the chemical, physical, and biological synthesis of silver nanoparticles (AgNPs) as well as their efficacy in the field of theranostics including microbiology and parasitology. Moreover, an outlook is also provided regarding the performance of AgNPs against different biological systems such as bacteria, fungi, viruses, and parasites (leishmanial and malarial parasites) in curing certain fatal human diseases, with a special focus on cancer. The mechanism of action of AgNPs in different biological systems still remains enigmatic. Here, due to limited available literature, we only focused on AgNPs mechanism in biological systems including human (wound healing and apoptosis), bacteria, and viruses which may open new windows for future research to ensure the versatile application of AgNPs in cosmetics, electronics, and medical fields.

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Section: Algaementioning

confidence: 99%

Nanosilver: new ageless and versatile biomedical therapeutic scaffold

Khan¹,

Saleh²,

Wahab³

et al. 2018

IJN

170

View full text Add to dashboard Cite

show abstract

“…Nanoparticles of silver are widely used in water filters (Jain and Pradeep 2005), bio sensors (Chen et al 2007), antibacterial activity (Venkatpurwar and Pokharkar 2011), anti-HIV activity ) and in controlling plant pathogens (Krishnaraj et al 2012). The biosynthetic method employing marine seaweed extract has received more attention as being simple, eco-friendly and less time consuming compared to usual chemical and physical methods.…”

Section: Introductionmentioning

confidence: 99%

Biosynthesis of silver nanoparticles from the marine seaweed Sargassum wightii and their antibacterial activity against some human pathogens

et al. 2013

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In this paper, we have reported on biological synthesis of nano-sized silver and its antibacterial activity against human pathogens. The nanoparticles of silver were formed by the reduction of silver nitrate to aqueous silver metal ions during exposure to the extract of marine seaweed Sargassum wightii. The optical properties of the obtained silver nanoparticles were characterized using UV-visible absorption and room temperature photoluminescence. The X-ray diffraction results reveal that the synthesized silver nanoparticles are in the cubic phase. The existence of functional groups was identified using Fourier transform infrared spectroscopy. The morphology and size of the synthesized particles were studied with atomic force microscope and highresolution transmission electron microscope measurements. The synthesized nanoparticles have an effective antibacterial activity against S. aureus, K. pneumoniae, and S. typhi.

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“…These EPS molecules can also act as efficient reducing agent through their sugar moieties and act as effective colloidal stabilisers that can be used for the green synthesis of nanoparticle [4]. Venkatpurwar and Pokharkar, [8] synthesised silver nanoparticles using sulphated polysaccharides isolated from marine red algae. Various other natural polysaccharides such as chitosan, starch and gum acacia have also been used to synthesise silver nanoparticles [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

A facile synthesis of silver nanoparticle with SERS and antimicrobial activity usingBacillus subtilisexopolysaccharides

Selvakumar

Aravindh

Ashok

et al. 2013

Journal of Experimental Nanoscience

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In this study, we report a facile synthesis of silver nanoparticle having SERS and antimicrobial activity using bacterial exopolysaccharide (EPS). Bacillus subtilis (MTCC 2422) was grown in nutrient broth and the extracellular EPS secreted by the organism was extracted and purified. The purified EPS was used for the synthesis of silver nanoparticles. The kinetics of silver nanoparticle synthesis was deduced by varying the exposure time and the concentration of EPS. The rate constant (k) for the synthesis of silver nanoparticle was calculated from the slope of ln(A 1 À A t ) versus time plot. The k value was found to be 3.49 Â 10 À3 , 5.81 Â 10 À3 and 5.03 Â 10 À3 per min for particle synthesis using 2, 5 and 10 mg/mL EPS, respectively. The nanoparticles synthesised had an average particle size of 5.18 AE 1.49 nm, 1.96 AE 0.77 nm and 2.08 AE 0.88 nm for 2, 5 and 10 mg/mL EPS, respectively. The synthesised particles were characterised using UV-Vis absorbance spectroscopy, high-resolution transmission electron microscopy (HRTEM) attached to EDS (energy dispersive spectroscopy), Fourier transform infrared spectroscopy (FTIR), surface enhanced Raman spectroscopy (SERS) and zeta potential analyser. To our knowledge, this is the first study to report SERS activity of microbial Bacillus subtilis EPS-based synthesis of silver nanoparticle. HRTEM images showed silver nanoparticle entrapped in polysaccharide nanocages. Silver nanoparticle showed higher adherence towards the bacterial surface, with good bactericidal activity against Pseudomonas aeroginosa and Staphylococcus aureus.

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Green synthesis of silver nanoparticles using marine polysaccharide: Study of in-vitro antibacterial activity

Cited by 208 publications

References 29 publications

Nanosilver: new ageless and versatile biomedical therapeutic scaffold

Nanosilver: new ageless and versatile biomedical therapeutic scaffold

Biosynthesis of silver nanoparticles from the marine seaweed Sargassum wightii and their antibacterial activity against some human pathogens

A facile synthesis of silver nanoparticle with SERS and antimicrobial activity usingBacillus subtilisexopolysaccharides

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