Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Attractive double-layer forces and charge regulation upon interaction between electrografted amine layers and silica
KTH Royal Institute of Technology, Sweden.
Aarhus University, Denmark.
Aarhus University, Denmark.
Aarhus University, Denmark.
Show others and affiliations
2012 (English)In: Journal of Colloid and Interface Science, ISSN 0021-9797, E-ISSN 1095-7103, Vol. 385, no 1, p. 225-234Article in journal (Refereed) Published
Abstract [en]

Amine functionalities have been introduced on glassy carbon surfaces through electrografting of 4-(2-aminoethyl)benzenediazonium tetrafluoroborate. The grafted layers were characterized by ellipsometry and by nanomechanical mapping in air and aqueous solutions using the atomic force microscopy PeakForce QNM mode. The layer was found to be 2.5. nm thick with low roughness, comparable to that of the glassy carbon substrate. However, small semi-spherical features were observed in the topographical image, indicating a clustering of the grafted amine compound. The nanomechanical mapping also demonstrated some swelling of the layer in water and pointed toward an important contribution of electrostatic interactions for the tip-surface adhesion. The forces between an aminated glassy carbon surface and a μm-sized silica particle in aqueous solutions were measured at different ionic strength and pH-values. The results demonstrate that an attractive double-layer force predominates at large separations, and that the surface charge densities increase as the separation between the surfaces decreases. The degree of charge regulation on the aminated glassy carbon is significant. The relatively low surface charge density of the aminated glassy carbon is attributed to significant incorporation of counterions in the water-rich grafted layer.

Place, publisher, year, edition, pages
2012. Vol. 385, no 1, p. 225-234
Keywords [en]
AFM, Double-layer force, Electrografting, Phenylethylamine, Surface charge, Surface potential, Amine compounds, Amine functionality, Benzenediazonium tetrafluoroborate, Carbon substrates, Charge regulation, Counterions, Double layer force, Glassy carbon surfaces, Grafted layers, Nanomechanical mappings, pH value, Phenylethylamines, Silica particles, Topographical images, Atomic force microscopy, Grafting (chemical), Ionic strength, Organic compounds, Separation, Silica, Solutions, Glassy carbon, 4 (aminoethyl)benzenediazonium tetrafluoroborate, amine, carbon, imidazole derivative, silicon dioxide, unclassified drug, water, adhesion, aqueous solution, article, chemical bond, chemical structure, dielectric constant, electrochemical analysis, electrode, electron transport, ellipsometry, force, molecular mechanics, pH, priority journal, static electricity, thickness
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:ri:diva-51186DOI: 10.1016/j.jcis.2012.06.071Scopus ID: 2-s2.0-84865385259OAI: oai:DiVA.org:ri-51186DiVA, id: diva2:1511942
Note

Funding details: VINNOVA, P38574-1; Funding details: Seattle Science Foundation, SSF; Funding text 1: G.D. acknowledges financial support from the SSF program “Microstructure, Corrosion and Friction Control”. A.D. acknowledges support through VINNOVA in the form of a VINNMER grant (P38574-1). J.I., K.D., E.T., and A.D. acknowledge the Nordic Innovation Centre and the TopNano program for financial support.

Available from: 2020-12-21 Created: 2020-12-21 Last updated: 2020-12-21Bibliographically approved

Open Access in DiVA

No full text in DiVA

Other links

Publisher's full textScopus
By organisation
YKI – Ytkemiska institutet
In the same journal
Journal of Colloid and Interface Science
Engineering and Technology

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 10 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf