Ag(0) Nanoparticles Stabilized with Poly(Ethylene Glycol)s Modified with Amino Groups: Formation and Properties in Solutions

Autor:	A. S. Senchukova, A. A. Lezov, T. N. Nekrasova, Evgeniy Ubyivovk, N. V. Girbasova, M. E. Mikhailova, A. Yu. Bilibin, A. S. Gubarev, N. V. Tsvetkov
Rok vydání:	2019
Předmět:	chemistry.chemical_classification Aqueous solution 010304 chemical physics Reducing agent Nanoparticle 02 engineering and technology Surfaces and Interfaces Polymer 021001 nanoscience & nanotechnology 01 natural sciences Silver nanoparticle chemistry.chemical_compound Colloid and Surface Chemistry chemistry Dynamic light scattering Chemical engineering 0103 physical sciences Molecule Physical and Theoretical Chemistry 0210 nano-technology Ethylene glycol
Zdroj:	Colloid Journal. 81:226-234
ISSN:	1608-3067 1061-933X
DOI:	10.1134/s1061933x19030062
Popis:	Reducing and stabilizing abilities of three poly(ethylene glycol) (PEG) samples modified with primary amino groups in one or two terminal positions of the polymer chains, as well as with dendrons based on L-aspartic acid in both terminal positions of the polymer chains, have been studied. Stable dispersions of silver nanoparticles have been formed at room temperature in aqueous solutions of AgNO3 in the presence of the modified PEGs without additional reducing agents. Spectrophotometric examinations have shown that an increase in the number of amino groups per polymer molecule results in accelerating the formation of nanoparticles and improving the stabilizing ability of the modified PEGs. Molecular hydrodynamic methods (analytical centrifugation and dynamic light scattering) have been used to determine the absolute values of the molecular mass of silver nanoparticles stabilized with dendronized PEGs and the hydrodynamic sizes of the particles. Molecular hydrodynamics and electron microscopy have yielded interconsistent estimates of silver nanoparticle sizes.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5de2d1fdad87a7ccd51e92690a8059b1 https://doi.org/10.1134/s1061933x19030062 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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