Multilayer Coatings Based On Citrate-Stabilized Gold Nanoparticles and Polydiallyldimethylammonium Chloride for the Electrophoretic Separation of Carboxylic Acids

D. V. Makeeva; Макеева Д. В.; K. S. Antipova; Антипова К. С.; E. V. Solovyeva; Соловьева Е. В.; V. P. Morgacheva; Моргачева В. П.; E. A. Kolobova; Колобова Е. А.; L. A. Kartsova; Карцова Л. А.

doi:10.31857/S0044450223030088

Multilayer Coatings Based On Citrate-Stabilized Gold Nanoparticles and Polydiallyldimethylammonium Chloride for the Electrophoretic Separation of Carboxylic Acids

Autores: Makeeva D.¹, Antipova K.¹, Solovyeva E.¹, Morgacheva V.¹, Kolobova E.¹, Kartsova L.¹
Afiliações:
1. St. Petersburg State University
Edição: Volume 78, Nº 3 (2023)
Páginas: 241-252
Seção: ОРИГИНАЛЬНЫЕ СТАТЬИ
URL: https://journals.rcsi.science/0044-4502/article/view/136008
DOI: https://doi.org/10.31857/S0044450223030088
EDN: https://elibrary.ru/FUQJKK
ID: 136008

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Resumo

The conditions for the formation of physically adsorbed three-layer coatings of quartz capillary walls in capillary electrophoresis (CE) with successively deposited oppositely charged layers of polydiallyldimethylammonium chloride (PDADMAC) modifiers and citrate-stabilized gold nanoparticles (GNPs) are proposed. It was shown that three-layer PDADMAC–GNP–PDADMAC coatings favorably differ from monolayer coatings with PDADMAC by greater stability in a wide range of pH (2–10). The formed coatings were characterized by scanning electron microscopy, and the presence of a uniform dense layer of nanoparticles on the capillary surface was confirmed. The applicability of the modified capillaries under CE conditions was demonstrated by the separation of a mixture of 16 carboxylic acids. An increase in the separation selectivity achieved with the use of three-layer coatings based on GNPs was explained by the reversible exchange of citrate anions on the GNP surface with negatively charged analytes in the course of electrophoretic analysis.

Palavras-chave

gold nanoparticles, multilayer coatings, capillary electrophoresis, carboxylic acids

Bibliografia

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