Facile biological approach for immobilization, physicochemical characterization and antibacterial activity of noble metals nanocomposites

Parveen, Asra; Ali, Tayyab; Wahid, Malik; Rao, Srinath

doi:10.1016/j.matlet.2015.02.059

Cited by 8 publications

(2 citation statements)

References 31 publications

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“…5. The results indicated three stages of weight loss, 43.95% at 22.45–242.26 °C (weight loss due to absorbed moisture), 242.46–389.02 °C (weight loss due to organic moieties present as capping agents around AgNPs) and 394.65–690.00 °C (weight loss due to organic moieties and decomposition of calcium) [34]. The remaining 56% of the residue was AgNPs.…”

Section: Resultsmentioning

confidence: 99%

Biosynthesis of silver nanoparticles using aqueous extract of silky hairs of corn and investigation of its antibacterial and anticandidal synergistic activity and antioxidant potential

Patra

Baek

2016

IET nanobiotechnol.

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This paper investigated the green synthesis of silver nanoparticles (AgNPs) using aqueous extract of silky hairs of corn ( L.) which is a waste material of the crop, as both a reducing and stabilising/capping agent. The AgNPs were characterised by UV-visible spectroscopy, scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX), thermogravimetric analysis (TGA), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR). The average size of AgNPs was found to be 249.12 nm. The AgNPs displayed strong antibacterial activity against five different foodborne pathogenic bacteria with diameter of inhibition zones ranged between (9.23 - 12.81 mm). It also exhibited potent synergistic antibacterial activity together with standard antibiotics, kanamycin (10.6 - 13.65 mm inhibition zones) and rifampicin (10.02 - 12.86 mm inhibition zones) and anticandidal activity with amphotericin b (10.57 - 13.63 mm inhibition zones). The AgNPs exhibited strong antioxidant activity in terms of nitric oxide scavenging (IC 91.56 µg/mL), ABTS (2,2'-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid) radical scavenging (IC 115.75 µg/mL), DPPH (1,1-diphenyl-2-picrylhydrazyl) radical scavenging (IC 385.87 µg/mL), and reducing power (IC 23.14 µg/mL). This study demonstrated the synthesis of spherical AgNPs with strong antibacterial, anticandidal and antioxidant properties that could potentially be utilised in the biomedical, cosmetic, food and pharmaceutical industries.

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Section: Resultsmentioning

confidence: 99%

Biosynthesis of silver nanoparticles using aqueous extract of silky hairs of corn and investigation of its antibacterial and anticandidal synergistic activity and antioxidant potential

Patra

Baek

2016

IET nanobiotechnol.

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“…Nanocomposite thin films containing Ag have been proposed and evaluated for a large variety of applications due to their interesting optical [1,2], electrical [2,3] and tribological/mechanical [4][5][6] properties as well as their biological activity [7,8]. Besides the specific properties of Ag and the matrix material, the performance of the nanocomposite thin films critically depends on the Ag nanoparticles size distribution and morphology as well as on the interfaces established between the nanoparticles and the matrix.…”

Section: Introductionmentioning

confidence: 99%

Characterization of surface Ag nanoparticles in nanocomposite a-C:Ag coatings by grazing incidence X-ray diffraction at sub-critical angles of incidence

et al. 2016

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Silver diffusion within nanocomposite films and/or toward the film surface is often observed during annealing of the silver-based nanocomposite films. In order to control and/or minimize this process, it is crucial to characterize the aggregated silver nanoparticles on the films surface. In this paper grazing incidence X-ray diffraction (GIXRD) with both sub-critical and supra-critical angles of incidence is used to characterize the Ag nanoparticles distribution, shape and structure both inside the matrix and on the nanocomposite film surface. The nanocomposite carbon coating containing Ag nanoparticles (a-C:Ag) was deposited by dc magnetron sputtering. The coatings were analyzed by GIXRD using fixed incident angles both below and above the critical angle for total reflection. By using sub-critical angles it was possible to eliminate diffraction from the bulk material allowing to estimate the size distribution of the nanoparticles sitting on the surface. The results obtained by GIXRD analysis were checked through comparison with the observations made by both TEM and SEM analysis. The proposed methodology can be used to characterized nanoparticles deposition on a surface and/or island formation during film growth as long an adequate substrate with high critical angle for total reflection is used.

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Exfoliated graphite nanoplatelets and gold nanoparticles based electrochemical sensor for determination of levodopa

Silva

Smaniotto²,

Vieira

2017

J Solid State Electrochem

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Facile biological approach for immobilization, physicochemical characterization and antibacterial activity of noble metals nanocomposites

Cited by 8 publications

References 31 publications

Biosynthesis of silver nanoparticles using aqueous extract of silky hairs of corn and investigation of its antibacterial and anticandidal synergistic activity and antioxidant potential

Biosynthesis of silver nanoparticles using aqueous extract of silky hairs of corn and investigation of its antibacterial and anticandidal synergistic activity and antioxidant potential

Characterization of surface Ag nanoparticles in nanocomposite a-C:Ag coatings by grazing incidence X-ray diffraction at sub-critical angles of incidence

Exfoliated graphite nanoplatelets and gold nanoparticles based electrochemical sensor for determination of levodopa

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