| Publikationstyp: | Beitrag in wissenschaftlicher Zeitschrift |
| Art der Begutachtung: | Peer review (Publikation) |
| Titel: | Single molecule observations of fatty acid adsorption at the silica/water interface : activation energy of attachment |
| Autor/-in: | Honciuc, Andrei Howard, Alexander L. Schwartz, Daniel K. |
| DOI: | 10.1021/jp8051856 |
| Erschienen in: | The Journal of Physical Chemistry C |
| Band(Heft): | 113 |
| Heft: | 6 |
| Seite(n): | 2078 |
| Seiten bis: | 2081 |
| Erscheinungsdatum: | 2008 |
| Verlag / Hrsg. Institution: | American Chemical Society |
| ISSN: | 1932-7447 1932-7455 |
| Sprache: | Englisch |
| Fachgebiet (DDC): | 540: Chemie |
| Zusammenfassung: | Total internal reflection fluorescence microscopy was used to obtain real-time images of individual fluorescently labeled hexadecanoic acid molecules as they absorbed at the aqueous-fused silica interface. In contrast with laterally averaged ensemble measurements of surface coverage versus time, single-molecule observations provide direct, model-independent measurements of adsorption kinetics. Additionally, since the observations were made under steady-state conditions at extremely low coverage, effects due to transport kinetics did not influence the results, permitting accurate measurement of the fundamental attachment rate as a function of temperature, that is, the rate at which molecules are transferred to the surface from the subsurface layer. We found that the attachment rate systematically increased with increasing temperature; an Arrhenius analysis gave an activation energy of Ea = 19 ± 2 kJ/mol. We hypothesize that this energy, which is similar in magnitude to the strength of an OH···O hydrogen bond, is associated with the displacement of a water molecule from the silica surface. |
| URI: | https://digitalcollection.zhaw.ch/handle/11475/13742 |
| Volltext Version: | Publizierte Version |
| Lizenz (gemäss Verlagsvertrag): | Lizenz gemäss Verlagsvertrag |
| Departement: | Life Sciences und Facility Management |
| Organisationseinheit: | Institut für Chemie und Biotechnologie (ICBT) |
| Enthalten in den Sammlungen: | Publikationen Life Sciences und Facility Management |
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Honciuc, A., Howard, A. L., & Schwartz, D. K. (2008). Single molecule observations of fatty acid adsorption at the silica/water interface : activation energy of attachment. The Journal of Physical Chemistry C, 113(6), 2078–2081. https://doi.org/10.1021/jp8051856
Honciuc, A., Howard, A.L. and Schwartz, D.K. (2008) ‘Single molecule observations of fatty acid adsorption at the silica/water interface : activation energy of attachment’, The Journal of Physical Chemistry C, 113(6), pp. 2078–2081. Available at: https://doi.org/10.1021/jp8051856.
A. Honciuc, A. L. Howard, and D. K. Schwartz, “Single molecule observations of fatty acid adsorption at the silica/water interface : activation energy of attachment,” The Journal of Physical Chemistry C, vol. 113, no. 6, pp. 2078–2081, 2008, doi: 10.1021/jp8051856.
HONCIUC, Andrei, Alexander L. HOWARD und Daniel K. SCHWARTZ, 2008. Single molecule observations of fatty acid adsorption at the silica/water interface : activation energy of attachment. The Journal of Physical Chemistry C. 2008. Bd. 113, Nr. 6, S. 2078–2081. DOI 10.1021/jp8051856
Honciuc, Andrei, Alexander L. Howard, and Daniel K. Schwartz. 2008. “Single Molecule Observations of Fatty Acid Adsorption at the Silica/Water Interface : Activation Energy of Attachment.” The Journal of Physical Chemistry C 113 (6): 2078–81. https://doi.org/10.1021/jp8051856.
Honciuc, Andrei, et al. “Single Molecule Observations of Fatty Acid Adsorption at the Silica/Water Interface : Activation Energy of Attachment.” The Journal of Physical Chemistry C, vol. 113, no. 6, 2008, pp. 2078–81, https://doi.org/10.1021/jp8051856.
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