Concentration induced properties of silver nanoparticles and their antibacterial study

Ugwoke, Emmanuel; Aisida, Samson O.; Mirbahar, Ameer Ahmed; Arshad, Mohammad; Ahmad, Ishaq; Zhao, Ting-kai; Ezema, Fabian I.

doi:10.1016/j.surfin.2019.100419

Cited by 28 publications

(16 citation statements)

References 83 publications

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“…As the XRD data revealed the most intense peak being at 38°, Bragg’s equation together with d = a /√( h 2 + k 2 + l 2 ) and a = 2 r √2 for fcc, the sum value for h , k , and l was found to be 3.12, thus confirming the principal peak as (111) at 38°, while the values of 4.13, 8.28, and 11.42 were calculated for 200, 220, and 311 peaks, respectively. 8 The shape formation during the synthesis of Ag NPs could be described in relation to the CSFE and SDS stabilization and preferential growth of these observed FCC crystal facets while assessing eqs 1 and 2 . 26 …”

Section: Resultsmentioning

confidence: 99%

“…As discussed, the dissimilar stabilization of {111}, {200}, and {220} FCC Ag crystallite facets led to rod, polytope, and quasispheroidal Ag NPs. 8 , 26 The best disparities in the shape were found when the [CSFE] was varied either in the absence or in the presence of SDS. Without SDS, the [CSFE] variation formed rod and polytope Ag NPs and produced quasi-spherical and oval Ag NPs in beyond cmc [SDS].…”

Section: Resultsmentioning

confidence: 99%

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Deciphering the Kinetic Study of Sodium Dodecyl Sulfate on Ag Nanoparticle Synthesis Using Cassia siamea Flower Extract as a Reducing Agent

et al. 2021

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Silver nanoparticles (Ag NPs) were synthesized using Cassia siamea flower petal extract (CSFE) as a reducing agent for the first time. In its presence and absence, the correlative effects of the anionic surface-active agent sodium dodecyl sulfate (SDS) were studied with respect to the development and texture of Ag NPs. Under different reagent compositions, the Ag NPs were inferred by localized surface plasmon resonance peaks between 419 and 455 nm. In the absence of SDS, there was a small eminence at 290 and around 350 nm, pointing toward the possibility of irregular polytope Ag NPs, which was confirmed in the transmission electron microscopy images. This elevation vanished beyond the cmc of [SDS], resulting in spherical and oval shaped Ag NPs. The effects of reagent concentrations were studied at 25 °C and around 7 and 9 pH in the absence and presence of SDS, respectively. Also, kinetic studies were performed by UV–visible spectrophotometry. Prodigious effects on shape and size were found under different synthesis conditions in terms of hexagonal, rod-, irregular-, and spherical shaped Ag NPs. Furthermore, the antimycotic activity of the synthesized Ag NPs was established on different Candida strains, and best results were found pertaining Candida tropicalis . The ensuing study impels the control of texture and dispersity for Ag NPs by CSFE and SDS, and the resultant polytope Ag NPs could be a future solution for drug-resistant pathogenic fungi.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Deciphering the Kinetic Study of Sodium Dodecyl Sulfate on Ag Nanoparticle Synthesis Using Cassia siamea Flower Extract as a Reducing Agent

et al. 2021

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“…Currently, nanotechnology is emerging field with its applications in science and technology such as bioengineering and nanomedicines through targeted drug delivery for cancer therapy, biomedical applications, pharmaceutical industry, contrast agents in magnetic resonance imaging (MRI), biosensing and antibacterial and photocatalytic agent [9][10][11][12][13][14][15][16]. Nanoparticles (NPs) are using in some cosmetics, sunscreens, toothpaste, pharmaceutical and even in food products [17].…”

Section: Introductionmentioning

confidence: 99%

Facile, one-pot biosynthesis and characterization of iron, copper and silver nanoparticles using Syzygium cumini leaf extract: As an effective antimicrobial and aflatoxin B1 adsorption agents

et al. 2020

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In this study, a facile, ecological and economical green method is described for the fabrication of iron (Fe), copper (Cu) and silver (Ag) nanoparticles (NPs) from the extract of Syzygium cumini leaves. The obtained metal NPs were categorized using UV/Vis, SEM, TEM, FTIR and EDX-ray spectroscopy techniques. The Fe-, Cu-and Ag-NPs were crystalline, spherical and size ranged from 40−52, 28−35 and 11−19 nm, respectively. The Ag-NPs showed excellent antimicrobial activities against methicillin-and vancomycin-resistance Staphylococcus aureus bacterial strains and Aspergillus flavus and A. parasiticus fungal species. Furthermore, the aflatoxins (AFs) production was also significantly inhibited when compared with the Fe-and Cu-NPs. In contrast, the adsorption results of NPs with aflatoxin B 1 (AFB 1) were observed as following order Fe->Cu->Ag-NPs. The Langmuir isotherm model well described the equilibrium data by the sorption capacity of Fe-NPs (105.3 ng mg-1), Cu-NPs (88.5 ng mg-1) and Ag-NPs (81.7 ng mg-1). The adsorption was found feasible, endothermic and follow the pseudo-second order kinetic model as revealed by the thermodynamic and kinetic studies. The present findings suggests that the green synthesis of metal NPs is a simple, sustainable, non-toxic, economical and energy-effective as compared to the others conventional approaches. In addition, synthesized metal NPs might be a promising AFs adsorbent for the detoxification of AFB 1 in human and animal food/feed.

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“…Silver-based nanoparticles have been extensively used to treat bacteria owing to their ability to generate reactive oxygen species (ROS) and cause silver-ion mediated toxicity. [11][12][13] However, the high cost, nonspecific toxicity, uncontrolled leaching of Ag + ions, and evidence of antibacterial resistance make their widespread use difficult. [14][15][16] Certain nanoparticles are known to manipulate oxidative processes by mimicking key enzymes, such as oxidase and peroxidase.…”

Section: Introductionmentioning

confidence: 99%

Peroxidase-like behavior and photothermal effect of chitosan-coated Prussian-blue nanoparticles: dual-modality antibacterial action with enhanced bioaffinity

et al. 2020

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Concentration induced properties of silver nanoparticles and their antibacterial study

Cited by 28 publications

References 83 publications

Deciphering the Kinetic Study of Sodium Dodecyl Sulfate on Ag Nanoparticle Synthesis Using Cassia siamea Flower Extract as a Reducing Agent

Deciphering the Kinetic Study of Sodium Dodecyl Sulfate on Ag Nanoparticle Synthesis Using Cassia siamea Flower Extract as a Reducing Agent

Facile, one-pot biosynthesis and characterization of iron, copper and silver nanoparticles using Syzygium cumini leaf extract: As an effective antimicrobial and aflatoxin B1 adsorption agents

Peroxidase-like behavior and photothermal effect of chitosan-coated Prussian-blue nanoparticles: dual-modality antibacterial action with enhanced bioaffinity

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