Gold nanoparticles dispersion stability under dynamic coating conditions in capillary zone electrophoresis

Szymon Dziomba , Krzesimir Ciura , Paulina Kocialkowska , Adam Prahl , Bartosz Wielgomas

Abstract

Capillary zone electrophoresis (CZE) of unmodified gold nanoparticles (Au NPs) was investigated in terms of dispersion stability in a presence of buffering counter-ions in background electrolyte (BGE). Capillary length, migration time and electric field strength were identified among factors influencing particles CZE. Moreover, BGE electrolysis was found to significantly affect analyses repeatability. The adsorption of NPs to capillary wall was recognized as the main problem. It was shown that this inconvenience can be overcome by the application of relatively big counter-ions. According to this observation, steric stabilization of NPs suspension by BGE components during CZE was hypothesized. In result, repeatable CZE of bare Au NPs under dynamic coating conditions was shown.
Author Szymon Dziomba
Szymon Dziomba,,
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, Krzesimir Ciura
Krzesimir Ciura,,
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, Paulina Kocialkowska
Paulina Kocialkowska,,
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, Adam Prahl PChP
Adam Prahl,,
- Laboratory of Chemistry of Biopolymers
, Bartosz Wielgomas
Bartosz Wielgomas,,
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Journal seriesJournal of Chromatography A, ISSN 0021-9673
Issue year2018
Vol1550
Pages63-67
Publication size in sheets0.5
Keywords in Englishadsorption, aggregation, electrolysis, nanoparticles, stability
DOIDOI:10.1016/j.chroma.2018.03.038
URL https://doi.org/10.1016/j.chroma.2018.03.038
Languageen angielski
Score (nominal)40
ScoreMinisterial score = 40.0, 11-04-2018, ArticleFromJournal
Ministerial score (2013-2016) = 40.0, 11-04-2018, ArticleFromJournal
Publication indicators WoS Impact Factor: 2016 = 3.981 (2) - 2016=4.008 (5)
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