Structural Surface Features of Paramagnetic Multifunctional Nanohybrids Based on Silver Oleic Acid

Sols of core–shell silver nanoparticles (AgNPs) are synthesized by electrochemical method. The method provides the ability to adjust the particle size by changing both the concentration of oleic acid and the residence time τ 0 in the organic phase. We synthesized AgNPs with oleic acid (OA) concentra...

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Bibliographic Details
Published in:Journal of cluster science 2021-09, Vol.32 (5), p.1351-1359
Main Authors: Khutsishvili, Spartak S., Toidze, Polina, Donadze, Marine, Gabrichidze, Maia, Makhaldiani, Nino, Agladze, Tamaz
Format: Article
Language:English
Subjects:
Bilayers
Catalysis
Chemical bonds
Chemistry
Chemistry and Materials Science
Differential thermal analysis
Electron paramagnetic resonance
Electrons
Empirical analysis
Ferromagnetism
Fourier transforms
Inorganic Chemistry
Ligands
Nanochemistry
Nanocomposites
Nanomaterials
Nanoparticles
Oleic acid
Original Paper
Physical Chemistry
Quantum chemistry
Silver
Spectra
Spectrum analysis
Surfactants
Synthesis
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Summary:Sols of core–shell silver nanoparticles (AgNPs) are synthesized by electrochemical method. The method provides the ability to adjust the particle size by changing both the concentration of oleic acid and the residence time τ 0 in the organic phase. We synthesized AgNPs with oleic acid (OA) concentration of 0.25% (AgNPs & 0.25% OA) and 0.75% (AgNPs & 0.75% OA). These nanoparticles have been studied using modern physical–chemical methods. Differential thermal analysis curves indicate the chemical nature of bond ligand in the secondary shell; this conclusion is confirmed by quantum chemical simulation and semi-empirical calculation. In the electron paramagnetic resonance spectra of silver-containing sols AgNPs & 0.25% OA and AgNPs & 0.75% OA complex wide asymmetric signals of 500–800 G and g -factor of 2.09–2.13 are recorded, in addition, in the spectra of AgNPs with bilayer the pronounced ferromagnetic contribution is observed. The change of the oleic acid layers of the particles affects the dimension of the nanocrystallites that are being formed and the manifestation of their magnetism. Trial registration number and date of registration JCS-P-20-03-0188.R1, 22-Sep-2020 (02-Mar-2020) Graphic Abstract
ISSN:1040-7278
1572-8862
DOI:10.1007/s10876-020-01904-6