Strain specificity in antimicrobial activity of silver and copper nanoparticles

Ruparelia, Jayesh; Chatterjee, A.; Duttagupta, Siddhartha P.; Mukherji, Suparna

doi:10.1016/j.actbio.2007.11.006

Cited by 1,694 publications

(1,047 citation statements)

References 39 publications

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“…In this study, the average particle size was about 50 nm, and we observed an enhanced antibacterial activity even at a higher number of bacterial colonies (10 7 CFU) at a much lesser nanoparticle concentration (7 mg per disc). Thus, the effective inhibition observed in our studies is in agreement with earlier reports [25,26]. …”

Section: Disc Diffusion Methodssupporting

confidence: 83%

“…When silver nanoparticles with an average size of 22.5 nm prepared by bacterial reduction were employed, Escherichia coli showed an inhibition zone of around 9 mm (10 mg nanoparticle per disc) [25]. In a different antimicrobial study using chemically synthesised, uncapped silver nanoparticles of 3 nm average size, a ZOI of around 14-15 mm was reported for E. coli strains [26]. However, this study also used discs with higher nanoparticle loading (100 mg) and fewer bacteria (10 3 -10 4 CFU).…”

Section: Disc Diffusion Methodsmentioning

confidence: 99%

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Ipomea carnea-based silver nanoparticle synthesis for antibacterial activity against selected human pathogens

Daniel

Bayyurt

Muthukumar

et al. 2012

Journal of Experimental Nanoscience

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Section: Disc Diffusion Methodssupporting

confidence: 83%

Section: Disc Diffusion Methodsmentioning

confidence: 99%

Ipomea carnea-based silver nanoparticle synthesis for antibacterial activity against selected human pathogens

Daniel

Bayyurt

Muthukumar

et al. 2012

Journal of Experimental Nanoscience

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“…5. However, in comparison to various reports on nanostructures of Ag, Pd, Fe-Pt, TiO 2 , ZnO, MgO, CuO, etc., the MIC and MIB values in present study are low (Peng et al 2002;Xie et al 2011;Stoimenov et al 2002;Morones et al 2005;Ruparelia et al 2007;Maenosono et al 2007;Tsuang et al 2008;Reddy et al 2007;Heinlaan et al 2008;De Windt et al 2006;Lyon et al 2005). Besides, they exhibit biofilm inhibition.…”

Section: Msns Synthesis and Physico-chemical Characterizationmentioning

confidence: 82%

Innovative biofilm inhibition and anti-microbial behavior of molybdenum sulfide nanostructures generated by microwave-assisted solvothermal route

et al. 2014

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The incessant use of antibiotics against infectious diseases has translated into a vicious circle of developing new antibiotic drug and its resistant strains in short period of time due to inherent nature of microorganisms to alter their genes. Many researchers have been trying to formulate inorganic nanoparticles-based antiseptics that may be linked to broad-spectrum activity and far lower propensity to induce microbial resistance than antibiotics. The way-out approaches in this direction are nanomaterials based (1) bactericidal and (2) bacteriostatic activities. We, herein, present hitherto unreported observations on microbial abatement using non-cytotoxic molybdenum disulfide nanostructures (MSNs) which are synthesized using microwave assisted solvothermal route. Inhibition of biofilm formation using MSNs is a unique feature of our study. Furthermore, this study evinces antimicrobial mechanism of MSNs by reactive oxygen species (ROS) dependent generation of superoxide anion radical via disruption of cellular functions.

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“…The concentration of bimetallic nanoparticles required to inhibit the growth of gram-positive bacteria is high which might be due to the well-known fact that the antibacterial action of Ag nanoparticles is by way of cleaving of the cell wall. This process is more effective in gram-negative bacterial wall due to their thin cell wall as compared to thick peptidoglycan layer of gram-positive bacteria [39]. It is pertinent to mention here that Au nanoparticles did not show inhibition against any type of bacteria.…”

Section: Synthesis Of Bimetallic Nanoparticlesmentioning

confidence: 97%

Triethylamine induced synthesis of silver and bimetallic (Ag/Au) nanoparticles in glycerol and their antibacterial study

2014

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Formation of Ag nanoplates in the presence of glycerol/triethylamine/polyvinylpyrrolidone without using any external reducing agent is shown for the first time. This approach is a unique and size-controlled synthetic method for the preparation of Ag nanoplates. Results reveal that addition of triethylamine to the precursor reaction mixture plays an important role both as a reagent for initiation and accelerator to produce nanoparticles at room temperature in the presence of glycerol. The basicity of the reaction mixture results in the appearance of two strongly localized surface plasmon resonance peaks of Ag nanoplates, effectively indicating the steady transition from non-planar structure to planar structure as confirmed by UV-Vis and transmission electron microscope measurements. The antibacterial activity of Ag and bimetallic (Ag/Au) nanoparticles were tested against gram-negative and grampositive bacteria. The enhanced antibacterial activity was observed with bimetallic nanoparticles with equal concentration of silver.

show abstract

Strain specificity in antimicrobial activity of silver and copper nanoparticles

Cited by 1,694 publications

References 39 publications

Ipomea carnea-based silver nanoparticle synthesis for antibacterial activity against selected human pathogens

Ipomea carnea-based silver nanoparticle synthesis for antibacterial activity against selected human pathogens

Innovative biofilm inhibition and anti-microbial behavior of molybdenum sulfide nanostructures generated by microwave-assisted solvothermal route

Triethylamine induced synthesis of silver and bimetallic (Ag/Au) nanoparticles in glycerol and their antibacterial study

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