A single photochemical route for the formation of both copper nanoparticles and patterned nanostructured films

Condorelli, Guglielmo G.; Costanzo, L.L.; Fragalá, Ignazio L.; Giuffrida, Salvatore; Ventimiglia, Giorgio

doi:10.1039/b308418c

Cited by 52 publications

(36 citation statements)

References 18 publications

(20 reference statements)

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“…Few studies have reported that copper nanoparticles exhibit excellent bactericidal properties [17][18][19][20]. Different methods have been available in the literature for the preparation of copper oxide nanoparticles, where flammable or corrosive reducing agent has been used such as titanium tetrachloride and hydrazine.…”

Section: Introductionmentioning

confidence: 99%

Microwave synthesis of copper oxide nanoparticles using tea leaf and coffee powder extracts and its antibacterial activity

2014

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Oxides of copper have been investigated for decades due to their unique semiconductor and optical properties. The review of literature revealed that very few reports are available on the synthesis of copper oxide nanoparticles using microorganisms and plant extracts. In this paper, we have reported the synthesis of copper oxide nanoparticles (CuO) using tea leaf and coffee powder extracts under microwave irradiations. The synthesis was carried out by irradiating metal salt and the extracts of tea and coffee in 1:3 ratio in a microwave at 540 W for 7-8 min. The synthesized nanoparticles were characterized by Scanning electron microscope, X-ray diffraction, UVvisible spectroscopy and Fourier transform infrared spectroscopy. The antibacterial activity of these nanoparticles was tested against six human pathogenic microbes. It was interesting to find that these nanoparticles possess remarkable antibacterial activity against two human pathogenic bacteria. Moreover, the use of environmentally benign materials for the synthesis of CuO nanoparticles offers numerous benefits of eco-friendliness and compatibility for pharmaceutical and other biomedical applications.

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Section: Introductionmentioning

confidence: 99%

Microwave synthesis of copper oxide nanoparticles using tea leaf and coffee powder extracts and its antibacterial activity

2014

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“…18 Copper can also be used as an antimicrobial agent, and CuO nanoparticles have been investigated previously for enhancing antibacterial properties. [19][20][21][22] Here we report a novel gel-combustion method, controlling the size of the synthesized nanoparticles and its effect on antimicrobial characteristics. The bactericidal property of such nanoparticles depends on their size, stability, and concentration added to the growth medium, since this provides greater retention time for bacterium nanoparticles interaction.…”

Section: Introductionmentioning

confidence: 99%

Size-dependent antimicrobial properties of CuO nanoparticles against Gram-positive and -negative bacterial strains

Azam

Ahmed²,

Oves³

et al. 2012

IJN

717

237

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Background: CuO is one of the most important transition metal oxides due to its captivating properties. It is used in various technological applications such as high critical temperature superconductors, gas sensors, in photoconductive applications, and so on. Recently, it has been used as an antimicrobial agent against various bacterial species. Here we synthesized different sized CuO nanoparticles and explored the size-dependent antibacterial activity of each CuO nanoparticles preparation. Methods: CuO nanoparticles were synthesized using a gel combustion method. In this approach, cupric nitrate trihydrate and citric acid were dissolved in distilled water with a molar ratio of 1:1. The resulting solution was stirred at 100°C, until gel was formed. The gel was allowed to burn at 200°C to obtain amorphous powder, which was further annealed at different temperatures to obtain different size CuO nanoparticles. We then tested the antibacterial properties using well diffusion, minimum inhibitory concentration, and minimum bactericidal concentration methods. Results: XRD spectra confirmed the formation of single phase CuO nanoparticles. Crystallite size was found to increase with an increase in annealing temperature due to atomic diffusion. A minimum crystallite size of 20 nm was observed in the case of CuO nanoparticles annealed at 400°C. Transmission electron microscopy results corroborate well with XRD results. All CuO nanoparticles exhibited inhibitory effects against both Gram-positive and -negative bacteria. The size of the particles was correlated with its antibacterial activity. Conclusion: The antibacterial activity of CuO nanoparticles was found to be size-dependent. In addition, the highly stable minimum-sized monodispersed copper oxide nanoparticles synthesized during this study demonstrated a significant increase in antibacterial activities against both Gram-positive and -negative bacterial strains.

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“…However, copper is sensitive to air, which has resulted in there being many fewer reports on the synthesis of Cu NPs than those of other metals. During the past few decades, Cu NPs have been prepared by various approaches including gamma radiolysis [11], photochemistry [12], electrochemistry [13], and wet chemical reduction [14][15][16]. Further development of Cu NP synthesis methods has been retarded by the broad size distribution, serious agglomeration, and low stability of the nanoparticles obtained.…”

Section: Introductionmentioning

confidence: 99%

Facile preparation of L-ascorbic acid-stabilized copper-chitosan nanocomposites with high stability and antimicrobial properties

Zhang

et al. 2015

Science Bulletin

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A single photochemical route for the formation of both copper nanoparticles and patterned nanostructured films

Cited by 52 publications

References 18 publications

Microwave synthesis of copper oxide nanoparticles using tea leaf and coffee powder extracts and its antibacterial activity

Microwave synthesis of copper oxide nanoparticles using tea leaf and coffee powder extracts and its antibacterial activity

Size-dependent antimicrobial properties of CuO nanoparticles against Gram-positive and -negative bacterial strains

Facile preparation of L-ascorbic acid-stabilized copper-chitosan nanocomposites with high stability and antimicrobial properties

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