Characterization of gold nanoparticles with different hydrophilic coatings via capillary electrophoresis and Taylor dispersion analysis. Part I: Determination of the zeta potential employing a modified analytic approximation.
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| Title: | Characterization of gold nanoparticles with different hydrophilic coatings via capillary electrophoresis and Taylor dispersion analysis. Part I: Determination of the zeta potential employing a modified analytic approximation. |
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| Authors: | Pyell, Ute1 pyellu@staff.uni-marburg.de, Jalil, Alaa H.1, Pfeiffer, Christian2, Pelaz, Beatriz2, Parak, Wolfgang J.2 |
| Source: | Journal of Colloid & Interface Science. Jul2015, Vol. 450, p288-300. 13p. |
| Subjects: | Gold nanoparticles, Hydrophilic compounds, Capillary electrophoresis, Particle size determination, Zeta potential, Borax |
| Abstract: | Taking gold nanoparticles with different hydrophilic coatings as an example, it is investigated whether capillary electrophoresis in combination with Taylor dispersion analysis allows for the precise determination of mean electrophoretic mobilities, electrophoretic mobility distributions, and zeta potentials in a matrix of exactly known composition and the calibration-free determination of number-weighted mean hydrodynamic radii. Our experimental data confirm that the calculation of the zeta potential for colloidal nanoparticles with ζ > 25 mV requires to take the relaxation effect into account. Because of the requirement to avoid particle–wall interactions, a solution of disodiumtetraborate decahydrate (borax) in deionized water had been selected as suitable electrolyte. Measurements of the electrophoretic mobility at different ionic strength and application of the analytic approximation developed by Ohshima show that in the present case of a buffered solution with a weak electrolyte co-ion and a strong electrolyte counterion, the effective ionic drag coefficient should be approximated with the ionic drag coefficient of the counterion. The obtained results are in good agreement with theoretical expectations regarding the dependence of the zeta potential and the electrokinetic surface charge density on the ionic strength. We also show that Taylor dispersion analysis (besides estimation of the number-weighted mean hydrodynamic radius) provides additional information on the type and width of the number-weighted particle distribution. [ABSTRACT FROM AUTHOR] |
| Copyright of Journal of Colloid & Interface Science is the property of Academic Press Inc. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 102114592 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Characterization of gold nanoparticles with different hydrophilic coatings via capillary electrophoresis and Taylor dispersion analysis. Part I: Determination of the zeta potential employing a modified analytic approximation. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Pyell%2C+Ute%22">Pyell, Ute</searchLink><relatesTo>1</relatesTo><i> pyellu@staff.uni-marburg.de</i><br /><searchLink fieldCode="AR" term="%22Jalil%2C+Alaa+H%2E%22">Jalil, Alaa H.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Pfeiffer%2C+Christian%22">Pfeiffer, Christian</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Pelaz%2C+Beatriz%22">Pelaz, Beatriz</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Parak%2C+Wolfgang+J%2E%22">Parak, Wolfgang J.</searchLink><relatesTo>2</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Journal+of+Colloid+%26+Interface+Science%22">Journal of Colloid & Interface Science</searchLink>. Jul2015, Vol. 450, p288-300. 13p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Gold+nanoparticles%22">Gold nanoparticles</searchLink><br /><searchLink fieldCode="DE" term="%22Hydrophilic+compounds%22">Hydrophilic compounds</searchLink><br /><searchLink fieldCode="DE" term="%22Capillary+electrophoresis%22">Capillary electrophoresis</searchLink><br /><searchLink fieldCode="DE" term="%22Particle+size+determination%22">Particle size determination</searchLink><br /><searchLink fieldCode="DE" term="%22Zeta+potential%22">Zeta potential</searchLink><br /><searchLink fieldCode="DE" term="%22Borax%22">Borax</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Taking gold nanoparticles with different hydrophilic coatings as an example, it is investigated whether capillary electrophoresis in combination with Taylor dispersion analysis allows for the precise determination of mean electrophoretic mobilities, electrophoretic mobility distributions, and zeta potentials in a matrix of exactly known composition and the calibration-free determination of number-weighted mean hydrodynamic radii. Our experimental data confirm that the calculation of the zeta potential for colloidal nanoparticles with ζ > 25 mV requires to take the relaxation effect into account. Because of the requirement to avoid particle–wall interactions, a solution of disodiumtetraborate decahydrate (borax) in deionized water had been selected as suitable electrolyte. Measurements of the electrophoretic mobility at different ionic strength and application of the analytic approximation developed by Ohshima show that in the present case of a buffered solution with a weak electrolyte co-ion and a strong electrolyte counterion, the effective ionic drag coefficient should be approximated with the ionic drag coefficient of the counterion. The obtained results are in good agreement with theoretical expectations regarding the dependence of the zeta potential and the electrokinetic surface charge density on the ionic strength. We also show that Taylor dispersion analysis (besides estimation of the number-weighted mean hydrodynamic radius) provides additional information on the type and width of the number-weighted particle distribution. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Journal of Colloid & Interface Science is the property of Academic Press Inc. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.jcis.2015.03.006 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 13 StartPage: 288 Subjects: – SubjectFull: Gold nanoparticles Type: general – SubjectFull: Hydrophilic compounds Type: general – SubjectFull: Capillary electrophoresis Type: general – SubjectFull: Particle size determination Type: general – SubjectFull: Zeta potential Type: general – SubjectFull: Borax Type: general Titles: – TitleFull: Characterization of gold nanoparticles with different hydrophilic coatings via capillary electrophoresis and Taylor dispersion analysis. Part I: Determination of the zeta potential employing a modified analytic approximation. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Pyell, Ute – PersonEntity: Name: NameFull: Jalil, Alaa H. – PersonEntity: Name: NameFull: Pfeiffer, Christian – PersonEntity: Name: NameFull: Pelaz, Beatriz – PersonEntity: Name: NameFull: Parak, Wolfgang J. IsPartOfRelationships: – BibEntity: Dates: – D: 15 M: 07 Text: Jul2015 Type: published Y: 2015 Identifiers: – Type: issn-print Value: 00219797 Numbering: – Type: volume Value: 450 Titles: – TitleFull: Journal of Colloid & Interface Science Type: main |
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