SAXS Combined with UV-vis Spectroscopy and QELS: Accurate Characterization of Silver Sols Synthesized in Polymer Matrices

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Abstract

The present work demonstrates a validation of small-angle X-ray scattering (SAXS) combining with ultra violet and visible (UV-vis) spectroscopy and quasi-elastic light scattering (QELS) analysis for characterization of silver sols synthesized in polymer matrices. Polymer matrix internal structure and polymer chemical nature actually controlled the sol size characteristics. It was shown that for precise analysis of nanoparticle size distribution these techniques should be used simultaneously. All applied methods were in good agreement for the characterization of size distribution of small particles (less than 60 nm) in the sols. Some deviations of the theoretical curves from the experimental ones were observed. The most probable cause is that nanoparticles were not entirely spherical in form.

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The Scattering of Light and the Radial Distribution Function of High Polymer Solutions

Bruno Zimm (1948)

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Mussel-Inspired Electrospun Nanofibers Functionalized with Size-Controlled Silver Nanoparticles for Wound Dressing Application.

Yong Jeong, Amin GhavamiNejad, Afeesh Rajan Unnithan … (2015)

Electrospun nanofibers that contain silver nanoparticles (AgNPs) have a strong antibacterial activity that is beneficial to wound healing. However, most of the literature available on the bactericidal effects of this material is based on the use of AgNPs with uncontrolled size, shape, surface properties, and degree of aggregation. In this study, we report the first versatile synthesis of novel catechol moieties presenting electrospun nanofibers functionalized with AgNPs through catechol redox chemistry. The synthetic strategy allows control of the size and amount of AgNPs on the surface of nanofibers with the minimum degree of aggregation. We also evaluated the rate of release of the AgNPs, the biocompatibility of the nanofibers, the antibacterial activity in vitro, and the wound healing capacity in vivo. Our results suggest that these silver-releasing nanofibers have great potential for use in wound healing applications.

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Size and Aging Effects on Antimicrobial Efficiency of Silver Nanoparticles Coated on Polyamide Fabrics Activated by Atmospheric DBD Plasma.

Margarida M Fernandes, Antonio Francesko, Tzanko Tzanov … (2015)

This work studies the surface characteristics, antimicrobial activity, and aging effect of plasma-pretreated polyamide 6,6 (PA66) fabrics coated with silver nanoparticles (AgNPs), aiming to identify the optimum size of nanosilver exhibiting antibacterial properties suitable for the manufacture of hospital textiles. The release of bactericidal Ag(+) ions from a 10, 20, 40, 60, and 100 nm AgNPs-coated PA66 surface was a function of the particles' size, number, and aging. Plasma pretreatment promoted both ionic and covalent interactions between AgNPs and the formed oxygen species on the fibers, favoring the deposition of smaller-diameter AgNPs that consequently showed better immediate and durable antimicrobial effects against Gram-negative Escherichia coli and Gram-positive Staphylococcus aureus bacteria. Surprisingly, after 30 days of aging, a comparable bacterial growth inhibition was achieved for all of the fibers treated with AgNPs <100 nm in size. The Ag(+) in the coatings also favored the electrostatic stabilization of the plasma-induced functional groups on the PA66 surface, thereby retarding the aging process. At the same time, the size-related ratio (Ag(+)/Ag(0)) of the AgNPs between 40 and 60 nm allowed for the controlled release of Ag(+) rather than bulk silver. Overall, the results suggest that instead of reducing the size of the AgNPs, which is associated with higher toxicity, similar long-term effects can be achieved with larger NPs (40-60 nm), even in lower concentrations. Because the antimicrobial efficiency of AgNPs larger than 30 nm is mainly ruled by the release of Ag(+) over time and not by the size and number of the AgNPs, this parameter is crucial for the development of efficient antimicrobial coatings on plasma-treated surfaces and contributes to the safety and durability of clothing used in clinical settings.

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Author and article information

Contributors

Leonid Bulavin: bulavin221@gmail.com

Nataliya Kutsevol: kutsevol@ukr.net

Vasyl Chumachenko: chumachenko_va@ukr.net

Dmytro Soloviov: DSolovjov@nf.jinr.ru

Alexander Kuklin: kuklin@nf.jinr.ru

Andrii Marynin: a_marinin@ukr.net

Journal

Journal ID (nlm-ta): Nanoscale Res Lett

Journal ID (iso-abbrev): Nanoscale Res Lett

Title: Nanoscale Research Letters

Publisher: Springer US (New York )

ISSN (Print): 1931-7573

ISSN (Electronic): 1556-276X

Publication date (Electronic): 27 January 2016

Publication date PMC-release: 27 January 2016

Publication date Collection: 2016

Volume: 11

Electronic Location Identifier: 35

Affiliations

[ ]Faculty of Chemistry, Taras Shevchenko National University, 60 Volodymyrska str., Kyiv, 0160 Ukraine

[ ]Faculty of Physics, Taras Shevchenko National University, 60 Volodymyrska str., Kyiv, 0160 Ukraine

[ ]Institute for Safety Problems of Nuclear Power Plants NAS of Ukraine, 12 Lysogirska str., Kyiv, 03680 Ukraine

[ ]Joint Institute for Nuclear Research, 6, Joliot-Curie str., Dubna, Moscow region 141980 Russian Federation

[ ]Moscow Institute of Physics and Technology, 9 Institutskiy per., Dolgoprudny, Moscow Region 141700 Russian Federation

[ ]Problem Research Laboratory, National University of Food Technology, 68, Volodymyrska str., 01601 Kyiv, Ukraine

Article

Publisher ID: 1230

DOI: 10.1186/s11671-016-1230-2

PMC ID: 4729753

PubMed ID: 26815604

SO-VID: 71db7bfd-deb1-4c88-a359-6e8e471866b1

License:

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License ( http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

History

Date received : 30 October 2015

Date accepted : 5 January 2016

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ScienceOpen disciplines: Nanomaterials

Keywords: saxs,qels,uv-vis,plasmon resonance,silver nanoparticles,uv-vis spectroscopy

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ScienceOpen disciplines: Nanomaterials

Keywords: saxs, qels, uv-vis, plasmon resonance, silver nanoparticles, uv-vis spectroscopy

SAXS Combined with UV-vis Spectroscopy and QELS: Accurate Characterization of Silver Sols Synthesized in Polymer Matrices

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Abstract

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Research from Ukraine

Most cited references 17

The Scattering of Light and the Radial Distribution Function of High Polymer Solutions

Mussel-Inspired Electrospun Nanofibers Functionalized with Size-Controlled Silver Nanoparticles for Wound Dressing Application.

Size and Aging Effects on Antimicrobial Efficiency of Silver Nanoparticles Coated on Polyamide Fabrics Activated by Atmospheric DBD Plasma.

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