Evaluation of the multifunctional activity of silver bionanocomposites in environmental remediation and inhibition of the growth of multidrug-resistant pathogens

Baruah, Rebika; Yadav, Archana; Das, Ashmita

doi:10.1039/d1nj06198d

Cited by 6 publications

(3 citation statements)

References 142 publications

(244 reference statements)

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“…Along with the bactericidal effect of Ag, the extensive surface area of Ag NPs makes the NPs profitable antimicrobial agents 19 . Several Ag NPs were used against some gram-positive and gram-negative bacteria, they were jasmine flower extract synthesized Ag NPs against Staphylococcus aureus and Escherichia coli 7 , Alpinia nigra fruits mediated Ag NPs against Klebsiella pneumoniae, Staphylococcus aureus and, Candida albicans 8 , onion peels mediated Ag NPs mediated Salmonella typhimurium and Staphylococcus aureus 3 , etc... In our study, Livistona jekinsiana and Lasia spinosa were applied in the synthesis of Ag NPs for the first time.…”

Section: Introductionmentioning

confidence: 90%

“…Many plants are used in the synthesis of Ag NPs. Alpinia nigra fruits mediated Ag NPs 6 , jasmine flower extract synthesized Ag NPs 7 , Artocarpus heterophyllus and Azadirachta indica mediated Ag NPs 1 , Citrus medica, Tagetes lemmonii, and Tarenna asiatica assisted Ag NPs 8 , onion peels mediated Ag NPs 9, etc. Polyphenolic compounds present in the plant extracts reduced Ag+ ions to Ag(0) NPs and stabilized them by capping around the NPs 2 .…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of multifunctional Ag NPs by using different plants

Baruah

2023

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Green synthesis of metal nanoparticles by using plant extracts is an environment-friendly, cost-effective and sustainable method. In our experiment, plant extracts of Livistona jekinsiana and Lasia spinosa were used in the synthesis of Ag NPs for the first time. Due to the high antioxidants contained and the traditional therapeutic applications of the mentioned plants, they were selected as ideal reducing and capping agents in the synthesis of Ag NPs. The synthesis of the Ag NPs was preliminarily confirmed by UV-Visible spectra of the synthesized NPs. The Fourier transform infrared (FTIR) spectra indicated the presence of -OH, C=C, -CN, -CH, etc. functional groups of phytocompounds on the surface of NPs. XRD patterns of Ag NPs revealed the FCC structure of the Ag NPs. FESEM and HRTEM micrographs determined the spherical shape and uniform size of the Ag NPs. EDX analysis confirmed the purity of Ag NPs. Higher negative values of zeta potential revealed the higher stability of the NPs. The NPs exhibited potential antimicrobial activity against Gram-positive bacteria Staphylococcus aureus (ATCC 11682), Gram-negative bacteria Escherichia coli (ATCC 11229), Pseudomonas aeruginosa (MTCC 2582), and fungi Candida albicans (MTCC 3017). Ag NPs also showed antioxidant activity, anti-inflammatory activity, and drug delivery ability with good results. The photocatalytic activity of Ag NPs was examined by the degradation of nitro compounds in the presence of sunlight. The kinetics of the photodegradation and reusability of the Ag NPs were also studied.

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Section: Introductionmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Synthesis of multifunctional Ag NPs by using different plants

Baruah

2023

Preprint

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“…In addition to conductivity, these polymers display also antibacterial activity [6][7][8][9][10]. Five organic dyes differing in molecular structure have been selected for the present study (Figure 2) for their antibacterial effect reported in the literature: crystal violet (triphenylmethane dye) [14][15][16][17], neutral red (phenazine dye) [18,19], methyl orange (azo dye) [20], acriflavine (acridine dye) [21][22][23], and methylene blue (thiazine dye) [18,22,24].…”

Section: Introductionmentioning

confidence: 99%

Coating of Leather with Dye-Containing Antibacterial and Conducting Polypyrrole

et al. 2023

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In the search for functional organic biomaterials, leather constituted by collagen fibers was coated with a conducting polymer, polypyrrole. The coating was carried out during the oxidation of pyrrole in an aqueous solution of poly(N-vinylpyrrolidone) in the presence of five organic dyes: crystal violet, neutral red, methyl orange, acriflavine, and methylene blue. This technique ensures the uniform coating of collagen fibers with polypyrrole and incorporation of organic dyes. The surface morphology was observed with scanning electron microscopy and the transverse profile, reflecting the penetration of the conducting phase into the leather body with optical microscopy. While the polypyrrole coating endows leather with electrical conductivity, organic dyes are expected to affect the polymer morphology and to provide an antibacterial effect. The lowest sheet resistance and antibacterial activity were obtained with crystal violet. This type of coating was characterized in more detail. Infrared spectroscopy confirmed the coating of collagen fibers with polypyrrole and dye incorporation. Mechanical properties were extended to the cyclic bending of the leather at various angles over 5000 cycles. The relative resistance changes were a few percent, indicating good electrical stability during repeated mechanical stress.

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