Particle size distributions of silver nanoparticles at environmentally relevant conditions

Cumberland, Susan A.; Lead, Jamie R.

doi:10.1016/j.chroma.2009.07.021

Cited by 284 publications

(170 citation statements)

References 29 publications

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“…to bare AgNPs induced stability (i.e., and even caused disaggregation) by steric repulsive forces and also increased the magnitude of bare AgNPs negative charge. 15,16,17,18 Overall, what is clear from these previous studies is that (capped) AgNPs readily interact with other components of natural surface waters and that a high mobility under environmentally relevant solution conditions would be expected. …”

Section: Introductionmentioning

confidence: 93%

“…to bare AgNPs induced stability (i.e., and even caused disaggregation) by means of steric repulsive forces and also by increasing the magnitude of the negative charge of bare AgNPs. 15,16,17,18 Consequently, strong electrostatic and steric interactions between citrate and River humic would cause these low interactions in Na + solutions, i.e., also evidenced in zero salt solutions ( Figure S1b). In contrast to their high stability in the presence of Na + , citrate-coated AgNPs readily aggregated in Ca 2+ and River humic-containing solutions (Figure 2a).…”

Section: Aggregation Kinetic Of Citrate-coated Agnps In Om-containingmentioning

confidence: 99%

See 1 more Smart Citation

Citrate-Coated Silver Nanoparticles Interactions with Effluent Organic Matter: Influence of Capping Agent and Solution Conditions

Gutierrez

Aubry²,

Cornejo

et al. 2015

Langmuir

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Just Accepted "Just Accepted" manuscripts have been peer-reviewed and accepted for publication. They are posted online prior to technical editing, formatting for publication and author proofing. The American Chemical Society provides "Just Accepted" as a free service to the research community to expedite the dissemination of scientific material as soon as possible after acceptance. "Just Accepted" manuscripts appear in full in PDF format accompanied by an HTML abstract. "Just Accepted" manuscripts have been fully peer reviewed, but should not be considered the official version of record. They are accessible to all readers and citable by the Digital Object Identifier (DOI®). "Just Accepted" is an optional service offered to authors. Therefore, the "Just Accepted" Web site may not include all articles that will be published in the journal. After a manuscript is technically edited and formatted, it will be removed from the "Just Accepted" Web site and published as an ASAP article. Note that technical editing may introduce minor changes to the manuscript text and/or graphics which could affect content, and all legal disclaimers and ethical guidelines that apply to the journal pertain. ACS cannot be held responsible for errors or consequences arising from the use of information contained in these "Just Accepted" manuscripts. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 2 Abstract: Fate and transport studies of silver nanoparticles (AgNPs) discharged from urban wastewaters containing effluent organic matter (EfOM) into natural waters represent a key knowledge gap. In this study, EfOM interfacial interactions with AgNPs and their aggregation kinetics were investigated by atomic force microscopy (AFM) and time-resolved dynamic light scattering (TR-DLS), respectively. Two well-characterized EfOM isolates, i.e., wastewater humic (WW humic) and wastewater colloids (WW colloids, a complex mixture of polysaccharides-proteins-lipids), and a River humic isolate of different characteristics were selected. Citrate-coated AgNPs were selected as representative capped-AgNPs. Citrate-coated AgNPs showed a considerable stability in Na + solutions. However, Ca 2+ ions induced aggregation by cation bridging between carboxyl groups on citrate. Although the presence of River humic increased the stability of citrate-coated AgNPs in Na + solutions due to electrosteric effects, they aggregated in WW humic-containing solutions, indicating the importance of humics characteristics during interactions. Ca 2+ ions increased citrate-coated AgNPs aggregation rates in both humic solutions, suggesting cation bridging between carboxyl groups on their structures as a dominant interacting mechanism. Aggregation of citrate-coated AgNPs in WW colloids solutions was significantly faster than those in both humic solutions. Control experiments in urea solution indicated hydr...

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Section: Introductionmentioning

confidence: 93%

Section: Aggregation Kinetic Of Citrate-coated Agnps In Om-containingmentioning

confidence: 99%

Citrate-Coated Silver Nanoparticles Interactions with Effluent Organic Matter: Influence of Capping Agent and Solution Conditions

Gutierrez

Aubry²,

Cornejo

et al. 2015

Langmuir

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“…The pH-dependent reduction suggests that alkaline aqueous environments are favorable for the reduction of Ag þ by DOM. As in this process, besides as a reductant, 13 DOM functions also as a coating agent to stabilize AgNPs through steric and charge interaction, 13,50 and the formed AgNPs are very stable over months in dark conditions. This stabilizing effect of DOM can improve the migration of AgNPs with water flow over long distances.…”

Section: àmentioning

confidence: 99%

Sunlight-Induced Reduction of Ionic Ag and Au to Metallic Nanoparticles by Dissolved Organic Matter

2012

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Metal-engineered nanoparticles (MENPs) with unique optical, electronic, and chemical properties have potential applications in catalysis, optical devices, and electronic applications. Particularly, metallic silver nanoparticles (AgNPs) have been applied as a broadspectrum antimicrobial agent in recent years. Colloidal nanosilver has been used for more than 100 years and has been registered as a biocidal material in the U.S. since 1954.2 AgNPs are the most common materials in nanotechnology-based consumer products, and the worldwide production of AgNPs was estimated at 500 t/a in 2008. 3 Inevitably, these MENPs can be discharged into the environment through the manufacturing, usage, disposal, and recycling processes of commercial products. 4À7The potential toxicity 8 and bioaccumula-

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“…However, the DLS depends on the hydrodynamic size while HRTEM depends on the physical size. Thus, the DLS bias tends to larger size fractions [46]. The dispersity is the measure of the heterogeneity of particles' sizes in the medium.…”

Section: Particle Size Distribution and Zeta Potentialmentioning

confidence: 99%

Assessment of in situ-Prepared Polyvinylpyrrolidone-Silver Nanocomposite for Antimicrobial Applications

et al. 2017

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Polyvinylpyrrolidone (PVP) is employed in several potential applications, relying of its special chemical and physical properties in addition to its low toxicity and biocompatibility. The aim of this work is to prepare polyvinylpyrrolidone-silver (PVP-Ag) nanocomposite with high inhibiting effect on the microbial growth and low cytotoxicity. In situ prepared small stable spherical silver nanoparticles, with narrow range particle size distribution, were obtained by easy, economical and rapid chemical reduction method. Silver ions were reduced to silver nanoparticles using low amount of sodium borohydride (NaBH4) as a strong reducing agent. PVP-Ag nanocomposite was prepared using PVP as a stabilizing and capping agent. Formation of the spherical silver nanoparticles with mean particle size 5 nm was confirmed by ultraviolet-visible spectroscopy, high resolution transmission electron microscopy, and dynamic light scattering. The inhibiting growth effect of the nanocomposite toward Gram-positive bacteria (Staphylococcus aureus), Gram-negative bacteria (Pseudomonas aeruginosa), and yeast fungus (Candida albicans) were studied. The cytotoxicity of the nanocomposite against BJ1 normal skin fibroblast cell line was tested. Results of this work presented perfect antimicrobial activity of the PVP-Ag nanocomposite towards bacteria and fungi with low cytotoxicity, which may lead to promising applications in skin wound healing.

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Particle size distributions of silver nanoparticles at environmentally relevant conditions

Cited by 284 publications

References 29 publications

Citrate-Coated Silver Nanoparticles Interactions with Effluent Organic Matter: Influence of Capping Agent and Solution Conditions

Citrate-Coated Silver Nanoparticles Interactions with Effluent Organic Matter: Influence of Capping Agent and Solution Conditions

Sunlight-Induced Reduction of Ionic Ag and Au to Metallic Nanoparticles by Dissolved Organic Matter

Assessment of in situ-Prepared Polyvinylpyrrolidone-Silver Nanocomposite for Antimicrobial Applications

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