Gold nanoparticles dispersion stability under dynamic coating conditions in capillary zone electrophoresis
Szymon Dziomba , Krzesimir Ciura , Paulina Kocialkowska , Adam Prahl , Bartosz Wielgomas
AbstractCapillary 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.
|Journal series||Journal of Chromatography A, ISSN 0021-9673|
|Publication size in sheets||0.5|
|Keywords in English||adsorption, aggregation, electrolysis, nanoparticles, stability|
|Score|| = 40.0, 11-04-2018, ArticleFromJournal|
= 40.0, 11-04-2018, ArticleFromJournal
|Publication indicators||: 2016 = 3.981 (2) - 2016=4.008 (5)|
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