scholarly journals Antibacterial Properties of Silver-Loaded Plasma Polymer Coatings

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Lydie Ploux ◽  
Mihaela Mateescu ◽  
Karine Anselme ◽  
Krasimir Vasilev
Keyword(s):  
Polymer Matrix ◽  
Plasma Polymerization ◽  
Antibacterial Effect ◽  
Antibacterial Properties ◽  
Polymer Coatings ◽  
Plasma Polymer ◽  
Surprising Result ◽  
Cultivable Bacteria ◽  
Planktonic Bacteria ◽  
Loaded Material

In a previous paper, we proposed new silver nanoparticles (SNPs) based antibacterial coatings able to protect eukaryotic cells from SNPs related toxic effects, while preserving antibacterial efficiency. A SNPs containing n-heptylamine (HA) polymer matrix was deposited by plasma polymerization and coated by a second HA layer. In this paper, we elucidate the antibacterial action of these new coatings. We demonstrated that SNPs-loaded material can be covered by thin HA polymer layer without losing the antibacterial activity to planktonic bacteria living in the near surroundings of the material. SNPs-containing materials also revealed antibacterial effect on adhered bacteria. Adhered bacteria number was significantly reduced compared to pure HA plasma polymer and the physiology of the bacteria was affected. The number of adhered bacteria directly decreased with thickness of the second HA layer. Surprisingly, the quantity of cultivable bacteria harvested by transfer to nutritive agar decreased not only with the presence of SNPs, but also in relation to the covering HA layer thickness, that is, oppositely to the increase in adhered bacteria number. Two hypotheses are proposed for this surprising result (stronger attachment or weaker vitality), which raises the question of the diverse potential ways of action of SNPs entrapped in a polymer matrix.

scholarly journals Antibacterial effect of silver nanorings

2020 ◽  
Author(s):  
Sara González-Fernández ◽  
Víctor Lozano-Iturbe ◽  
Beatriz García ◽  
Luis J. Andrés ◽  
Mª Fe Menéndez ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Antibiotic Resistance ◽  
Molecular Mechanisms ◽  
Antibacterial Effect ◽  
Culture Media ◽  
Antibacterial Properties ◽  
Growth Patterns ◽  
Dependent Effect ◽  
Planktonic Bacteria ◽  
New Type

Abstract Background: The emergence and expansion of antibiotic resistance makes it necessary to have alternative anti-infective agents, among which silver nanoparticles (AgNPs) display especially interesting properties. AgNPs carry out their antibacterial action through various molecular mechanisms, and the magnitude of the observed effect is dependent on multiple, not fully understood, aspects, particle shape being one of the most important. In this article, we conduct a study of the antibacterial effect of a recently described type of AgNP: silver nanorings (AgNRs), making comparisons with other alternative types of AgNP synthesized in parallel using the same methodology. Results: When they act on planktonic forms, AgNRs produce a smaller effect on the viability of different bacteria than nanoparticles with other structures although their effect on growth is more intense over a longer period. When their action on biofilms is analyzed, AgNRs show a greater concentration-dependent effect. In both cases it was observed that the effect on inhibition depends on the microbial species, but not its Gram positive or negative nature. Growth patterns in silver-resistant Salmonella strains suggest that AgNRs work through different mechanisms to other AgNPs. The antibacterial effect is also produced to some extent by the conditioning of culture media or water by contact with AgNPs but, at least over short periods of time, this is not due to the release of Ag ions. Conclusions: AgNRs constitute a new type of AgNP, whose antibacterial properties depend on their shape, and is capable of acting efficiently on both planktonic bacteria and biofilms.

scholarly journals Antibacterial effect of silver nanorings

2020 ◽  
Author(s):  
Sara González-Fernández ◽  
Víctor Lozano-Iturbe ◽  
Beatriz García ◽  
Luis J. Andrés ◽  
Mª Fe Menéndez ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Antibiotic Resistance ◽  
Molecular Mechanisms ◽  
Antibacterial Effect ◽  
Culture Media ◽  
Antibacterial Properties ◽  
Growth Patterns ◽  
Dependent Effect ◽  
Planktonic Bacteria ◽  
New Type

Abstract Background: The emergence and expansion of antibiotic resistance makes it necessary to have alternative anti-infective agents, among which silver nanoparticles (AgNPs) display especially interesting properties. AgNPs carry out their antibacterial action through various molecular mechanisms, and the magnitude of the observed effect is dependent on multiple, not fully understood, aspects, particle shape being one of the most important. In this article, we conduct a study of the antibacterial effect of a recently described type of AgNP: silver nanorings (AgNRs), making comparisons with other alternative types of AgNP synthesized in parallel using the same methodology. Results: When they act on planktonic forms, AgNRs produce a smaller effect on the viability of different bacteria than nanoparticles with other structures although their effect on growth is more intense over a longer period. When their action on biofilms is analyzed, AgNRs show a greater concentration-dependent effect. In both cases it was observed that the effect on inhibition depends on the microbial species, but not its Gram positive or negative nature. Growth patterns in silver-resistant Salmonella strains suggest that AgNRs work through different mechanisms to other AgNPs. The antibacterial effect is also produced to some extent by the conditioning of culture media or water by contact with AgNPs but, at least over short periods of time, this is not due to the release of Ag ions. Conclusions: AgNRs constitute a new type of AgNP, whose antibacterial properties depend on their shape, and is capable of acting efficiently on both planktonic bacteria and biofilms.

scholarly journals Antibacterial effect of silver nanorings

2020 ◽  
Author(s):  
Sara González-Fernández ◽  
Víctor Lozano-Iturbe ◽  
Beatriz García ◽  
Luis J. Andrés ◽  
Mª Fe Menéndez ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Antibiotic Resistance ◽  
Molecular Mechanisms ◽  
Antibacterial Effect ◽  
Culture Media ◽  
Antibacterial Properties ◽  
Growth Patterns ◽  
Dependent Effect ◽  
Planktonic Bacteria ◽  
New Type

Abstract Background: The emergence and expansion of antibiotic resistance makes it necessary to have alternative anti-infective agents, among which silver nanoparticles (AgNPs) display especially interesting properties. AgNPs carry out their antibacterial action through various molecular mechanisms, and the magnitude of the observed effect is dependent on multiple, not fully understood, aspects, particle shape being one of the most important. In this article, we conduct a study of the antibacterial effect of a recently described type of AgNP: silver nanorings (AgNRs), making comparisons with other alternative types of AgNP synthesized in parallel using the same methodology.Results: When they act on planktonic forms, AgNRs produce a smaller effect on the viability of different bacteria than nanoparticles with other structures although their effect on growth is more intense over a longer period. When their action on biofilms is analyzed, AgNRs show a greater concentration-dependent effect. In both cases it was observed that the effect on inhibition depends on the microbial species, but not its Gram positive or negative nature. Growth patterns in silver-resistant Salmonella strains suggest that AgNRs work through different mechanisms to other AgNPs. The antibacterial effect is also produced to some extent by the conditioning of culture media or water by contact with AgNPs but, at least over short periods of time, this is not due to the release of Ag ions.Conclusions: AgNRs constitute a new type of AgNP, whose antibacterial properties depend on their shape, and is capable of acting efficiently on both planktonic bacteria and biofilms.

scholarly journals Antibacterial effect of silver nanorings

2020 ◽  
Author(s):  
Sara González-Fernández ◽  
Víctor Lozano-Iturbe ◽  
Beatriz García ◽  
Luis J. Andrés ◽  
Mª Fe Menéndez ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Antibiotic Resistance ◽  
Molecular Mechanisms ◽  
Antibacterial Effect ◽  
Culture Media ◽  
Antibacterial Properties ◽  
Growth Patterns ◽  
Dependent Effect ◽  
Planktonic Bacteria ◽  
New Type

Abstract Background: The emergence and expansion of antibiotic resistance makes it necessary to have alternative anti-infective agents, among which silver nanoparticles (AgNPs) display especially interesting properties. AgNPs carry out their antibacterial action through various molecular mechanisms, and the magnitude of the observed effect is dependent on multiple, not fully understood, aspects, particle shape being one of the most important. In this article, we conduct a study of the antibacterial effect of a recently described type of AgNP: silver nanorings (AgNRs), making comparisons with other alternative types of AgNP synthesized in parallel using the same methodology.Results: When they act on planktonic forms, AgNRs produce a smaller effect on the viability of different bacteria than nanoparticles with other structures although their effect on growth is more intense over a longer period. When their action on biofilms is analyzed, AgNRs show a greater concentration-dependent effect. In both cases it was observed that the effect on inhibition depends on the microbial species, but not its Gram positive or negative nature. Growth patterns in silver-resistant Salmonella strains suggest that AgNRs work through different mechanisms to other AgNPs. The antibacterial effect is also produced to some extent by the conditioning of culture media or water by contact with AgNPs but, at least over short periods of time, this is not due to the release of Ag ions.Conclusions: AgNRs constitute a new type of AgNP, whose antibacterial properties depend on their shape, and is capable of acting efficiently on both planktonic bacteria and biofilms.

Surface Modification of Textile Tire Cords by Plasma Polymerization for Improvement of Rubber Adhesion

2000 ◽  
Vol 73 (1) ◽  
pp. 121-137 ◽  
Author(s):  
Shijian Luo ◽  
Wim J. van Ooij ◽  
Edith Mäder ◽  
Karsten Mai
Keyword(s):  
Plasma Polymerization ◽  
Analytical Techniques ◽  
Polymer Coatings ◽  
Plasma Polymer ◽  
Continuous Reactor ◽  
Pull Out ◽  
Pulsed Dc ◽  
Tentative Model ◽  
Performance Results ◽  
Deposition Conditions

Abstract Aramid cords and fibers and polyester tire cords were treated by means of plasma polymerization techniques. Coatings of plasma-polymerized pyrrole or acetylene were deposited on the surface of cords and fibers in a custom-built semi-continuous reactor operated on a pulsed DC glow discharge. The deposition conditions of the plasma-polymer coatings were varied within wide limits. The cords were tested for adhesion in rubber in a industrial pull-out test. It was found that the plasma polymer coating can significantly increase pull-out forces. Coatings deposited under low power and high pressure conditions performed better than the coatings prepared under high power and low pressure conditions. The plasma-polymerized coatings were characterized by a range of analytical techniques and the performance results are explained in a tentative model based on the molecular structure of the films. The structure was found to be strongly dependent on the deposition conditions.

scholarly journals Antibacterial effect of silver nanorings

2019 ◽  
Author(s):  
Sara González-Fernández ◽  
Víctor Lozano-Iturbe ◽  
Beatriz García ◽  
Luis J. Andrés ◽  
Mª Fe Menéndez ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Antibiotic Resistance ◽  
Molecular Mechanisms ◽  
Antibacterial Effect ◽  
Culture Media ◽  
Antibacterial Properties ◽  
Growth Patterns ◽  
Dependent Effect ◽  
Planktonic Bacteria ◽  
New Type

Abstract Background The emergence and expansion of antibiotic resistance makes it necessary to have alternative anti-infective agents, among which silver nanoparticles (AgNPs) display especially interesting properties. AgNPs carry out their antibacterial action through various molecular mechanisms, and the magnitude of the observed effect is dependent on multiple, not fully understood, aspects, particle shape being one of the most important. In this article, we conduct a study of the antibacterial effect of a new type of AgNP: silver nanorings (AgNRs), and compare it with other alternative types of AgNP synthesized in parallel using the same methodology.Results When they act on planktonic forms, AgNRs produce a smaller effect on the viability of different bacteria than nanoparticles with other structures although their effect on growth is more intense over a longer period. When their action on biofilms is analyzed, AgNRs show a greater concentration-dependent effect. In both cases it was observed that the effect on inhibition depends on the microbial species, but not its Gram positive or negative nature. Growth patterns in silver-resistant Salmonella strains suggest that AgNRs work through different mechanisms to other AgNPs. The antibacterial effect is also produced to some extent by the conditioning of culture media or water by contact with AgNPs but, at least over short periods of time, this is not due to the release of Ag ions.Conclusions AgNRs constitute a new type of AgNP, whose antibacterial properties depend on their shape, and is capable of acting efficiently on both planktonic bacteria and biofilms.

Antibacterial Activity of Biodegradable Particles based on Chitosan Containing Colloidal Silver

2020 ◽  
Vol 36 (4) ◽  
pp. 87-93
Author(s):  
V.Yu. Reshetova ◽  
A.F. Krivoshchepov ◽  
I.A. Butorova ◽  
N.B. Feldman ◽  
S.V. Lutsenko ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Polymer Matrix ◽  
Adipic Acid ◽  
Antibacterial Effect ◽  
Academic Excellence ◽  
Colloidal Silver ◽  
Scanning Electron Microscopy Data ◽  
Covalent Bonds ◽  
Agar Diffusion Test

Chitosan beads with colloidal silver nanoparticles inclued in the polymer matrix have been obtained by the introduction of chitosan into an acidified nanosilver sol. Dual interconnection of drops of the resulting solution was then carried out by ionotropic gelation at the first stage and covalent crosslinking of the polymer matrix with adipic acid at the second stage. The surface morphology of the obtained beads was studied by scanning electron microscopy. Data of Fourier transform IR spectroscopy confirmed the formation of covalent bonds between chitosan and adipic acid. The antibacterial activity of obtained beads against S. aureus and E. coli was evaluated using agar diffusion test. It was shown that the сhitosan beads modified with nanostructured silver exhibited an antibacterial effect against the tested strains, and they can be used as a basis for creating biodegradable wound healing dressings with a prolonged antibacterial effect. chitosan, silver nanoparticles, antibacterial activity, wound dressings This work was supported by the "Russian Academic Excellence Project 5-100". The study was carried out with the financial support of the Russian Foundation for Basic Research in the framework of the Scientific Project no. 18-29-18039.

scholarly journals Deposition of 2‐oxazoline‐based plasma polymer coatings using atmospheric pressure helium plasma jet

2019 ◽  
Vol 16 (10) ◽  
pp. 1900104 ◽  
Author(s):  
Sameer A. Al‐Bataineh ◽  
Alex A. Cavallaro ◽  
Andrew Michelmore ◽  
Melanie N. Macgregor ◽  
Jason D. Whittle ◽  
...  
Keyword(s):  
Atmospheric Pressure ◽  
Plasma Jet ◽  
Polymer Coatings ◽  
Plasma Polymer ◽  
Helium Plasma

A Zn azelate MOF: combining antibacterial effect

CrystEngComm ◽  
2015 ◽  
Vol 17 (2) ◽  
pp. 456-462 ◽  
Author(s):  
C. Tamames-Tabar ◽  
E. Imbuluzqueta ◽  
N. Guillou ◽  
C. Serre ◽  
S. R. Miller ◽  
...  
Keyword(s):  
Antibacterial Effect ◽  
Metal Organic Framework ◽  
Antibacterial Properties ◽  
Metal Organic ◽  
Organic Framework

A novel biocompatible and bioactive zinc azelate metal–organic framework (BioMIL-5) was hydrothermally synthesized with interesting long-term antibacterial properties.

Allylamine Plasma Polymer Coatings of Interior Surfaces in Small Trench Structures

2008 ◽  
Vol 5 (1) ◽  
pp. 105-112 ◽  
Author(s):  
Wilfried Besch ◽  
Rüdiger Foest ◽  
Karsten Schröder ◽  
Andreas Ohl
Keyword(s):  
Polymer Coatings ◽  
Plasma Polymer
Sign in / Sign up

Export Citation Format

Share Document