Self-organization and the effects of selenium-polymer mass ratio in solution on the morphology of selenium-bearing nanostructures based on hydroxyethylcellulose

The systems show the adsorption of considerable numbers of hydroxyethylcellulose HEC macromolecules on selenium nanoparticles with the formation of a supermolecular close-packed nanostructure for form close to spherical. As the mass fraction of selenium in solution increases up to ν = 0.1, there is...

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Bibliographic Details
Published in:Fibre chemistry 2008-07, Vol.40 (4), p.340-344
Main Authors: Novoselov, N. P, Ivanov, D. A, Valueva, S. V, Borovikova, L. N
Format: Article
Language:English
Subjects:
Adsorption
Chemistry
Chemistry and Materials Science
Density
Macromolecules
Nanocomposites
Nanomaterials
Nanoparticles
Nanostructure
Organic Chemistry
Polymer Sciences
Selenium
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Summary:The systems show the adsorption of considerable numbers of hydroxyethylcellulose HEC macromolecules on selenium nanoparticles with the formation of a supermolecular close-packed nanostructure for form close to spherical. As the mass fraction of selenium in solution increases up to ν = 0.1, there is a considerable increase in Mw for the nanostructure, with the inertial radius R*g and hydrodynamic radius R*h only slightly and nonmonotonically dependent on the selenium concentration in the aqueous solution. On the other hand, the mean density of the nanostructures Φ* is substantially dependent on the selenium concentration in the solution. The point ν = 0.1 corresponds to a turning point in the dependence of the molecular conformation parameters on the mass selenium: polymer ratio in solution. Probably, ν = 0.1 corresponds to saturation of the adsorption capacity in the amorphous selenium nanoparticles.
ISSN:0015-0541
1573-8493
DOI:10.1007/s10692-009-9057-6