A simple green method is used for the synthesis of silver (Ag) nanodendrites. The aqueous leaf extract of Rhizophora apicualata was used for the synthesis of Ag nanodendrites. The bioorganic components present in the aqueous extract acted as a reducing agent. The absorption maxima of silver nanoparticle are confirmed by UV-Vis spectrophotometer. The X-ray diffraction patterns (XRD) suggest the crystalline nature of Ag nanoparticles. Transmission electron microscopy (TEM) images revealed the formation of silver nanodendrites. The morphology of silver nanoparticles (AgNPs) varied with the concentration of the precursor metal salts. The use of environmentally benign reducing agent makes the synthesis ideally suited for production and its application in medical field. © 2013 IEEE.

Amitava Mukherjee

Centre for Nanobiotechnology

Vellore Campus

Chandra Sekaran N

Dhas S.P

Vellore Institute of Technology (VIT) is a private university located in&nbsp;Tamil Nadu, India. Founded in 1984, as Vellore Engineering College, the institution offers 20 undergraduate, 34 postgraduate, four integrated and four research programs. It has campuses in Vellore, Amravati, Bhopal and Chennai.

VIT is one of the top ranked private universities in India according to NIRF, THE and QS Rankings.&nbsp;Govt. of India has recognized&nbsp;VIT, Vellore as an&nbsp;Institution of Eminence. This has allowed VIT to take independent quality initiatives and move up in world ranking.

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VIT University

Biomediated synthesis of silver nanodendrites

International Conference on Advanced Nanomaterials & Emerging Engineering Technologies

The stability of commercial silver nanoparticles (SNPs) in aquatic environment plays a significant role in its toxicity to the environment and to human health. Here, we have studied the impact of bacterial exopolysaccharides (EPS) to the stability of engineered SNPs. When nanoparticles are present in neutral water, the nanoparticles exhibited low zeta potential and are least stable. However, in the presence of EPS (10-250 mg/L), the negative surface charge of nanoparticles increased and therefore the propensity of nanoparticles to aggregate is reduced. In UV-visible spectroscopic analysis a decrease in absorbance at plasmon peak of SNPs (425 nm) was observed till the addition of 50 mg/L of EPS, beyond that a blue shift towards 417 nm was observed. The adsorption of EPS was confirmed by Fourier-transform infrared spectroscopy. The EPS adsorbed SNPs were more stable and exhibited the zeta potential of higher than -30 mV. © 2011 Elsevier Ltd.

Water Research

Impact of exopolysaccharides on the stability of silver nanoparticles in water

In the present study, silver nanoparticles were rapidly synthesized at room temperature by treating silver ions with the Citrus limon (lemon) extract. The effect of various process parameters like the reductant concentration, mixing ratio of the reactants and the concentration of silver nitrate were studied in detail. In the standardized process, 10(-2)M silver nitrate solution was interacted for 4h with lemon juice (2% citric acid concentration and 0.5% ascorbic acid concentration) in the ratio of 1:4 (vol:vol). The formation of silver nanoparticles was confirmed by Surface Plasmon Resonance as determined by UV-Visible spectra in the range of 400-500 nm. X-ray diffraction analysis revealed the distinctive facets (111, 200, 220, 222 and 311 planes) of silver nanoparticles. We found that citric acid was the principal reducing agent for the nanosynthesis process. FT-IR spectral studies demonstrated citric acid as the probable stabilizing agent. Silver nanoparticles below 50 nm with spherical and spheroidal shape were observed from transmission electron microscopy. The correlation between absorption maxima and particle sizes were derived for different UV-Visible absorption maxima (corresponding to different citric acid concentrations) employing "MiePlot v. 3.4". The theoretical particle size corresponding to 2% citric acid concentration was compared to those obtained by various experimental techniques like X-ray diffraction analysis, atomic force microscopy, and transmission electron microscopy.

Colloids and Surfaces B: Biointerfaces

Biomimetic synthesis of silver nanoparticles by Citrus limon (lemon) aqueous extract and theoretical prediction of particle size

Applied Nanoscience

Antibacterial potential of biosynthesised silver nanoparticles using Avicennia marina mangrove plant

Advances in Colloid and Interface Science

Green synthesis of biogenic metal nanoparticles by terrestrial and aquatic phototrophic and heterotrophic eukaryotes and biocompatible agents

Comparative evaluation of antibacterial activity of silver nanoparticles synthesized using Rhizophora apiculata and glucose

Journal	Data powered by TypesetInternational Conference on Advanced Nanomaterials & Emerging Engineering Technologies
Publisher	Data powered by TypesetIEEE
Open Access	0