Preparation of siloxane-based urethane dimethacrylates carrying carboxylic groups and the effect of silver nanoparticles on the properties of composite polymer films

2011 ◽  
Vol 50 (5) ◽  
pp. 874-883 ◽  
Author(s):  
Tinca Buruiana ◽  
Violeta Melinte ◽  
Florentina Jitaru ◽  
Emil C. Buruiana ◽  
Lavinia Balan
Keyword(s):  
Silver Nanoparticles ◽  
Polymer Films ◽  
Composite Polymer ◽  
Carboxylic Groups

scholarly journals Reactivity and Chemical Sintering of Carey Lea Silver Nanoparticles

Nanomaterials ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 1525
Author(s):  
Sergey Vorobyev ◽  
Elena Vishnyakova ◽  
Maxim Likhatski ◽  
Alexander Romanchenko ◽  
Ivan Nemtsev ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Silver Nanoparticles ◽  
Flexible Electronics ◽  
Photoelectron Spectroscopy ◽  
Colloidal Solutions ◽  
Ag Nps ◽  
Wide Range ◽  
Carboxylic Groups ◽  
The Media ◽  
Sulfide Ions

Carey Lea silver hydrosol is a rare example of very concentrated colloidal solutions produced with citrate as only protective ligands, and prospective for a wide range of applications, whose properties have been insufficiently studied up to now. Herein, the reactivity of the immobilized silver nanoparticles toward oxidation, sulfidation, and sintering upon their interaction with hydrogen peroxide, sulfide ions, and chlorocomplexes of Au(III), Pd(II), and Pt(IV) was investigated using SEM and X-ray photoelectron spectroscopy (XPS). The reactions decreased the number of carboxylic groups of the citrate-derived capping and promoted coalescence of 7 nm Ag NPs into about 40 nm ones, excluding the interaction with hydrogen peroxide. The increased nanoparticles form loose submicrometer aggregates in the case of sulfide treatment, raspberry-like micrometer porous particles in the media containing Pd(II) chloride, and densely sintered particles in the reaction with inert H2PtCl6 complexes, probably via the formation of surface Ag-Pt alloys. The exposure of Ag NPs to HAuCl4 solution produced compact Ag films along with nanocrystals of Au metal and minor Ag and AgCl. The results are promising for chemical ambient temperature sintering and rendering silver-based nanomaterials, for example, for flexible electronics, catalysis, and other applications.

Polymer Films with Silver Nanoparticles Improve the Spectral Characteristics of Photovoltaic Converters

2020 ◽  
Vol 46 (1) ◽  
pp. 98-101
Author(s):  
L. S. Lunin ◽  
O. V. Devitskii ◽  
A. A. Kravtsov ◽  
A. S. Pashchenko
Keyword(s):  
Silver Nanoparticles ◽  
Polymer Films ◽  
Spectral Characteristics

Studies on PEO-based sodium ion conducting composite polymer films

Ionics ◽  
2007 ◽  
Vol 14 (3) ◽  
pp. 255-262 ◽  
Author(s):  
Saumya R. Mohapatra ◽  
Awalendra K. Thakur ◽  
R. N. P. Choudhary
Keyword(s):  
Polymer Films ◽  
Sodium Ion ◽  
Composite Polymer ◽  
Conducting Composite ◽  
Ion Conducting

Switching behavior of plasma polymer films containing silver nanoparticles

2003 ◽  
Vol 94 (10) ◽  
pp. 6988-6990 ◽  
Author(s):  
A. Kiesow ◽  
J. E. Morris ◽  
C. Radehaus ◽  
A. Heilmann
Keyword(s):  
Silver Nanoparticles ◽  
Polymer Films ◽  
Plasma Polymer ◽  
Switching Behavior

scholarly journals Coherent random lasers in weakly scattering polymer films containing silver nanoparticles

2009 ◽  
Vol 79 (5) ◽  
Author(s):  
Xiangeng Meng ◽  
Koji Fujita ◽  
Shunsuke Murai ◽  
Katsuhisa Tanaka
Keyword(s):  
Silver Nanoparticles ◽  
Polymer Films ◽  
Random Lasers

Evaluation of the permeability of silver nanoparticles in polymer films of sulfonated polystyrene-co-acrylic acid

2017 ◽  
Vol 520 ◽  
pp. 78-84
Author(s):  
Marcos Marques da Silva Paula ◽  
Helton Jeremias de Souza ◽  
Carina Búrigo ◽  
Jamile Thön Langbehn ◽  
Alice Scarabelot Baesso ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Acrylic Acid ◽  
Polymer Films ◽  
Sulfonated Polystyrene

scholarly journals Enhanced antibacterial activity through silver nanoparticles deposited onto carboxylated graphene oxide surface

2021 ◽  
Author(s):  
Arturo Barjola ◽  
María Ángeles Tormo ◽  
Oscar Sahuquillo ◽  
Patricia Bernabé ◽  
José Manuel Pérez ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Graphene Oxide ◽  
Biofilm Formation ◽  
Material Surface ◽  
Oxide Surface ◽  
Main Role ◽  
Carboxylic Groups ◽  
Average Size

Abstract The strong bactericidal action of silver nanoparticles (AgNPs) is usually limited for their degree of aggregation. Deposition of AgNPs onto a graphene oxide (GO) surface to generate GO-Ag hybrids has been shown to be an effective method to control these aggregation problems. In this sense, a novel carboxylated graphene oxide-silver nanoparticle (GOCOOH-Ag) material has been synthesized and their antibacterial and biofilm formation inhibition have been studied.AgNPs decorating the GOCOOH surface achieved an average size of 6.74±0.25 nm, which was smaller than those of AgNPs deposited onto the GO surface. In addition, better distribution of AgNPs was obtained using carboxylated material. It is important to highlight the main role of the carboxylic groups in the nucleation and growth of the AgNPs that decorate the GO-based material surface.In vitro antibacterial activity and antibiofilm-forming action were tested against Gram-positive (Staphylococcus aureus and Staphylococcus epidermidis) and Gram-negative bacteria (Pseudomonas aeruginosa and Escherichia coli). Both GO-Ag and GOCOOH-Ag reduced the bacterial growth, analyzed by time-kill curves. However, the minimum inhibitory concentration and the minimum bactericidal concentration of GOCOOH-Ag were lower than those of GO-Ag for all strains studied, indicating that GOCOOH-Ag has better antibacterial activity. In addition, both nanomaterials prevent biofilm-formation, with a higher reduction of biofilm mass and cell viability in the presence of GOCOOH-Ag. The carboxylation functionalization in GO-based materials can be applied to improve the bactericidal and antibiofilm-forming action of the AgNPs.

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