One-step preparation of antimicrobial silver nanoparticles in polymer matrix

2015 ◽  
Vol 17 (3) ◽  
Author(s):  
O. Lyutakov ◽  
Y. Kalachyova ◽  
A. Solovyev ◽  
S. Vytykacova ◽  
J. Svanda ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Polymer Matrix ◽  
One Step

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 Simple One-Step Method to Synthesize Polypyrrole-Indigo Carmine-Silver Nanocomposite

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Lara Fernandes Loguercio ◽  
Pedro Demingos ◽  
Luiza de Mattos Manica ◽  
Jordana Borges Griep ◽  
Marcos José Leite Santos ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Infrared Spectroscopy ◽  
Near Infrared ◽  
Indigo Carmine ◽  
Electrochemical Process ◽  
Conjugation Length ◽  
Step Method ◽  
Polypyrrole Films ◽  
One Step ◽  
Silver Nanocomposite

A nanocomposite of indigo carmine doped polypyrrole/silver nanoparticles was obtained by a one-step electrochemical process. The nanocomposite was characterized by scanning electron microscopy, infrared spectroscopy, ultraviolet-visible-near infrared spectroscopy, and cyclic voltammetry. The simple one-step process allowed the growth of silver nanoparticles during the polymerization of polypyrrole, resulting in films with electrochromic behavior and improved electroactivity. In addition, polypyrrole chains in the nanocomposite were found to present longer conjugation length than pristine polypyrrole films.

Silver nanoparticles modified with sulfanilic acid for one-step colorimetric and visual determination of histidine in serum

2016 ◽  
Vol 183 (6) ◽  
pp. 1865-1872 ◽  
Author(s):  
Pengcheng Huang ◽  
Jianfang Li ◽  
Juan Song ◽  
Nan Gao ◽  
Fangying Wu
Keyword(s):  
Silver Nanoparticles ◽  
Sulfanilic Acid ◽  
One Step

scholarly journals SERS Activity of Silver Nanosphere, Triangular Nanoplates, Hexagonal Nanoplates and Quasi-Spherical Nanoparticles: Effect of Shape and Morphology

Coatings ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 288 ◽  
Author(s):  
Marco Zannotti ◽  
Andrea Rossi ◽  
Rita Giovannetti
Keyword(s):  
Methylene Blue ◽  
Silver Nanoparticles ◽  
Raman Scattering ◽  
Vinyl Pyrrolidone ◽  
Sers Substrates ◽  
Vis Spectroscopy ◽  
Surface Enhanced Raman ◽  
One Step ◽  
Poly Vinyl Pyrrolidone ◽  
Hexagonal Nanoplates

In this work, we prepared different morphologies of silver nanoparticles: nanosphere, triangular nanoplates, hexagonal nanoplates, and quasi-spherical shapes, through one-step synthesis. Hydrogen peroxide was used as the oxidizing agent during the reduction of silver nitrate by sodium borohydride, in the presence of tri-sodium citrate and poly-vinyl-pyrrolidone. The obtained silver nanoparticles were fully characterized by UV-Vis spectroscopy, Dynamic Light Scattering and Scanning Electron Microscopy, and successfully used as Surface Enhanced Raman Scattering (SERS) substrates. The effect of shape and morphology on the Raman scattering enhancement was evaluated by using methylene blue as target molecules. The Raman measurements demonstrated that the prepared substrates are reliable and sensitive with analytical enhancement factors, estimated to be around 105 with a concentration of methylene blue 1 μM. When triangular and hexagonal nanoplates were tested with different concentrations of analyte, they demonstrated a good linearity in Raman intensity with a good detection of methylene blue 0.1 μM.

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