Aggregative stability of colloidal 3D and 2D silver nanoparticles, stabilised by 11-mercaptoundecanoic acid, in the presence of singly charged cations

  • Pavel O. Malakhovsky Research Institute for Physical Chemical Problems, Belarusian State University, 14 Lieninhradskaja Street, Minsk 220006, Belarus https://orcid.org/0000-0002-3924-0103
  • Alexey V. Rashkevich Belarusian State University, 4 Niezaliežnasci Avenue, Minsk 220030, Belarus https://orcid.org/0000-0003-0400-9902
  • Egor A. Minakov Belarusian State University, 4 Niezaliežnasci Avenue, Minsk 220030, Belarus https://orcid.org/0000-0001-9163-4954
  • Mikhail Artemyev Research Institute for Physical Chemical Problems, Belarusian State University, 14 Lieninhradskaja Street, Minsk 220006, Belarus https://orcid.org/0000-0002-6608-0002
DOI: https://doi.org/10.33581/2520-257X-2022-1-3-17

Abstract

We studied the aggregative stability of colloidal silver quasi-spherical nanoparticles and two-dimensional nanoplates, stabilised by 11-mercaptoundecanoic acid, in the presence of phosphate buffers containing different singly charged cations (Li+ , Na+ , K+ , Cs+) and tris-HCl at pH 8.0 and concentration 0.02 mol/L which mimics the carbodiimide conjugation conditions of nanoparticles with biomolecules. Aggregation of silver nanoplates occurs in the presence of Na-phosphate buffer whereas at the same conditions the quasi-spherical nanoparticles retain colloidal stability. The difference in colloidal stability between 3D and 2D silver nanoparticles is due to the increase of the apparent acid dissociation constant on the nanoplates’ basal faces and the subsequent increase in specific bridging interactions nanoparticle – cation – nanoparticle which can be eliminated by introducing of non-ionic spacer (11-mercapto-1-undecanol) in the ligand layer. Silver nanoplates with mixed ligand layer have increased colloidal stability across the pH.

Author Biographies

Pavel O. Malakhovsky, Research Institute for Physical Chemical Problems, Belarusian State University, 14 Lieninhradskaja Street, Minsk 220006, Belarus

junior researcher at the laboratory of nanochemistry

Alexey V. Rashkevich, Belarusian State University, 4 Niezaliežnasci Avenue, Minsk 220030, Belarus

student at the faculty of chemistry

Egor A. Minakov, Belarusian State University, 4 Niezaliežnasci Avenue, Minsk 220030, Belarus

graduate at the faculty of chemistry

Mikhail Artemyev, Research Institute for Physical Chemical Problems, Belarusian State University, 14 Lieninhradskaja Street, Minsk 220006, Belarus

doctor of science (chemistry), full professor; head of the laboratory of nanochemistry

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Published
2022-03-16
Keywords: colloidal silver nanoparticles, silver nanoplates, colloidal stability, ligand layer
Supporting Agencies This work was conducted under the project 2.1.04.01 of the state program of scientific research «Chemical processes, reagents and technologies, bioregulators and bioorganic chemistry». We thank World Federation of Scientists (CERN, Switzerland) for partial financial support. We are grateful to K. V. Skrotskaya for transmission electron microscopic investigation.
How to Cite
Malakhovsky, P. O., Rashkevich, A. V., Minakov, E. A., & Artemyev, M. (2022). Aggregative stability of colloidal 3D and 2D silver nanoparticles, stabilised by 11-mercaptoundecanoic acid, in the presence of singly charged cations. Journal of the Belarusian State University. Chemistry, 1, 3-17. https://doi.org/10.33581/2520-257X-2022-1-3-17
Issue
No 1 (2022): Journal of the Belarusian State University. Chemistry
Section
Original Articles

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