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Effect of Reductant (Chitosan) Molecular Mass on the Synthesis of Silver Nanoparticle Dispersions and the Properties of Ring Deposits Resulting from Evaporation of Droplets of These Dispersions

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Abstract

A comparative analysis has been performed for silver nanoparticle dispersions obtained by the chemical reduction of Ag+ ions using several samples of chitosan with different molecular masses as reductants and stabilizers. The structure and conductivity of ring deposits resulting from the evaporation of droplets of the obtained dispersion have been studied. It has been shown that the average size of silver nanoparticles, their number concentration, and the degree of precursor reduction weakly depend on chitosan molecular mass, while the geometric parameters and electrical conductivity of the ring deposits substantially change upon the passage from oligochitosans to high-molecular-mass chitosan.

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Notes

  1. In this case, coefficients α and γ are equal to the fraction of the contribution from particles with average diameter dv to the total scattered intensity and the total volume of the dispersed phase, respectively.

  2. In the case of a semiconducting interlayer, another mechanism that provides the ohmic conductivity is possible (see below).

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ACKNOWLEDGMENTS

We are grateful for the possibility to use the equipment of the Center for Collective Use of the Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences.

Funding

This work was performed within the framework of the order of the Ministry of Science and Higher Education of the Russian Federation and supported by the Program for Basic Research of the Presidium of the Russian Academy of Sciences no. 14.

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Authors and Affiliations

  1. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, 119071, Moscow, Russia

    V. V. Vysotskii, O. Ya. Uryupina, E. K. Urodkova & A. V. Zaitseva

  2. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 119991, Moscow, Russia

    V. E. Tikhonov

Authors
  1. V. V. Vysotskii
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  2. O. Ya. Uryupina
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  3. E. K. Urodkova
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  4. A. V. Zaitseva
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  5. V. E. Tikhonov
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Corresponding authors

Correspondence to V. V. Vysotskii or V. E. Tikhonov.

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The authors declare that they have no conflict of interest.

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Translated by A. Kirilin

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Vysotskii, V.V., Uryupina, O.Y., Urodkova, E.K. et al. Effect of Reductant (Chitosan) Molecular Mass on the Synthesis of Silver Nanoparticle Dispersions and the Properties of Ring Deposits Resulting from Evaporation of Droplets of These Dispersions. Colloid J 82, 641–648 (2020). https://doi.org/10.1134/S1061933X20060204

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  • DOI: https://doi.org/10.1134/S1061933X20060204

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