Characterization of copper nanoparticles synthesized by a novel microbiological method

Varshney, Ratnika; Bhadauria, Seema; Gaur, M. S.; Pasricha, Renu

doi:10.1007/s11837-010-0171-y

Cited by 95 publications

(32 citation statements)

References 28 publications

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“…In parallel, Varshney et al [10,18] reported the spectral analysis of copper nanoparticles synthesised by P. stutzuri showed an inter-band transition which produced yellow hydrosol at 570 and 780 nm due to plasmon resonance (Figure 2). This showed that UV spectroscopy measurements provide strong evidence to detect the presence of copper nanoparticles and also it revealed that synthesised particles have broad range of absorption spectrum.…”

Section: Discussionmentioning

confidence: 93%

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Antifungal activity of biosynthesised copper nanoparticles evaluated against red root-rot disease in tea plants

Ponmurugan¹,

Manjukarunambika²,

Elango³

et al. 2016

Journal of Experimental Nanoscience

133

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The synthesis of metal nanoparticles is an emerging area of advanced research and technology with potential application in plant protection. In the current study, with an eco-friendly approach, a convenient method was adopted, where copper nanoparticles are biosynthesised extracellularly by using Streptomyces griseus. Further, the existence of nanoparticles was confirmed by UVÀvisible spectroscopy, transmission electron microscopy, X-ray diffraction analysis and Fourier transform infrared spectroscopy characterisation. We assessed the field effectiveness of copper nanoparticles through soil application in P. hypolateritia infested tea plants. In response to seven different treatments, carbendazim exhibited superior control followed by nanocopper at 2.5 ppm dosage. However, maximum leaf yield was observed in plants treated with nanocopper. In addition, nanocopper-treated plants showed improved soil macronutrients considerably when compared to bulk copper and carbendazim treated plants. In addition, there was trivial variation in population dynamics of microbes noted in plants treated with nanocopper. These encouraging results confirmed that nanocopper could act as an efficient novel fungicide which may be used for the management of red root-rot disease in tea plantations.

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Section: Discussionmentioning

confidence: 93%

“…The flasks were then incubated in incubator shaker (150 rpm) at room temperature. [10] During the process of biosynthesis, the flasks were noted for colour change to confirm the formation of nanoparticles visually.…”

Section: Biosynthesis Of Copper Nanoparticlesmentioning

confidence: 99%

Antifungal activity of biosynthesised copper nanoparticles evaluated against red root-rot disease in tea plants

Ponmurugan¹,

Manjukarunambika²,

Elango³

et al. 2016

Journal of Experimental Nanoscience

133

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“…Extracellular biosynthesis of 40 nm Ag NPs by the culture supernatant of Bacillus licheniformis has been customized as an easy way to work out the process [28]. Varshney et al have reported a rapid biological synthesis technique for the synthesis of spherical Cu nanoparticles of in the size range of 8-15 nm using non-pathogenic Pseudomonas stutzeri [29] (Fig. 2).…”

Section: Fabrication Of Nanoparticles Using Bacteriamentioning

confidence: 99%

A Review: Biological Synthesis Of Silver and Copper Nanoparticles

Varshney¹,

Bhadauria²,

Gaur³

2012

Nano BioMed ENG

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The antimicrobial properties of silver nanoparticles were known since ancient times and silver ions are widely used as bactericidal agent. Researchers have also recommended the use of silver and copper ions as superior disinfectants for wastewater generated from hospitals containing infectious microorganisms. A wide range of nanophasic and nanostructured particles are being fabricated globally with the aim of developing clean, nontoxic and eco-friendly technologies. Use of ambient biological resources in this area of science is rapidly gaining importance owing to its growing success and simplicity. Currently, simple prokaryotes to complex eukaryotic organisms including higher angiospermic plants are used for the fabrication of NPs.One area of untapped potential is the use of microbes to fabricate copper nanoparticles. We are working on this aspect and successfully fabricated spherical copper nanoparticles of size 4-10 nm. This article presents a review of the ambient biological systems for fabrication of these nanoparticles and development of an updated knowledge base.

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“…The majority of these methods are applied to produce Cu NPs [7,[9][10][11][12][13][14][15][16][17]. Methods that use mini mum numbers of stages and components are obviously the most promising ones.…”

Section: Introductionmentioning

confidence: 99%

Quantum-chemical simulation of nanoparticle formation from copper carboxylates

Соловьев

Иржак

2015

Colloid J

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The DFT B3LYP/6 31G** quantum chemical method has been employed to study the structure of copper carboxylate complexes and clusters composed of copper atoms and carboxylate molecules. Pecu liarities of nanoparticle formation from the carboxylates under the conditions of their clustering have been considered. It has been established that the growth of Cu(1+) complexes begins from structures containing three copper atoms, while a complex containing two copper atoms is thermodynamically disadvantageous. The complexation is accompanied by the passage from a bidentate cyclic carboxylate-metal coordination, which is typical of a monomeric salt, to a bidentate bridging coordination. As the size of a complex increases, the energy of the attachment of a salt molecule and a metal atom to the growing nanoparticle increases, tend ing to some limit. It has been shown that nucleation of a nanoparticle may be accompanied by an additional stabilization via the direct coordination of a metal atom with a carboxyl group. The direction of the process to the formation of either metal nanoparticles or mixed clusters is determined by the gain in the Gibbs free energy.

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Characterization of copper nanoparticles synthesized by a novel microbiological method

Cited by 95 publications

References 28 publications

Antifungal activity of biosynthesised copper nanoparticles evaluated against red root-rot disease in tea plants

Antifungal activity of biosynthesised copper nanoparticles evaluated against red root-rot disease in tea plants

A Review: Biological Synthesis Of Silver and Copper Nanoparticles

Quantum-chemical simulation of nanoparticle formation from copper carboxylates

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