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Open Chemistry

formerly Central European Journal of Chemistry


IMPACT FACTOR 2018: 1.512
5-year IMPACT FACTOR: 1.599

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SCImago Journal Rank (SJR) 2018: 0.345
Source Normalized Impact per Paper (SNIP) 2018: 0.684

ICV 2018: 163.25

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ISSN
2391-5420
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Volume 8, Issue 4

Issues

Volume 13 (2015)

Capillary electrophoretic separation and characterizations of CdSe quantum dots

Sławomir Oszwałdowski / Katarzyna Zawistowska / Laura Grigsby / Kenneth Roberts
Published Online: 2010-06-17 | DOI: https://doi.org/10.2478/s11532-010-0052-9

Abstract

We have developed a capillary electrophoresis method to characterize the QD surface ligand interactions with various surfactant systems. The method was demonstrated with 2–5 nm CdSe nanoparticles surface-passivated with trioctylphosphine oxide (TOPO). Water solubility was accomplished by surfactant-assisted phase transfer via an oil-in-water microemulsion using either cationic, anionic, or non-ionic surfactants. Interaction between the QD surface ligand (TOPO) and the alkyl chain of the surfactant molecule produces a complex and dynamic surface coating that can be characterized through manipulation of CE separation buffer composition and capillary surface modification. Additional characterization of the QD surface ligand interactions with surfactants was accomplished by UV-VIS spectroscopy, photoluminescence, and TEM. It is anticipated that studies such as these will elucidate the dynamics of QD surface ligand modifications for use in sensors.

Keywords: Nanoparticles; Size separation; Dynamic coating; Capillary electrophoresis; Surfactant coated CdSe nanoparticles

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About the article

Published Online: 2010-06-17

Published in Print: 2010-08-01


Citation Information: Open Chemistry, Volume 8, Issue 4, Pages 806–819, ISSN (Online) 2391-5420, DOI: https://doi.org/10.2478/s11532-010-0052-9.

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© 2010 Versita Warsaw. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License. BY-NC-ND 3.0

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