Publication type: | Article in scientific journal |
Type of review: | Peer review (publication) |
Title: | Single molecule observations of fatty acid adsorption at the silica/water interface : activation energy of attachment |
Authors: | Honciuc, Andrei Howard, Alexander L. Schwartz, Daniel K. |
DOI: | 10.1021/jp8051856 |
Published in: | The Journal of Physical Chemistry C |
Volume(Issue): | 113 |
Issue: | 6 |
Page(s): | 2078 |
Pages to: | 2081 |
Issue Date: | 2008 |
Publisher / Ed. Institution: | American Chemical Society |
ISSN: | 1932-7447 1932-7455 |
Language: | English |
Subject (DDC): | 540: Chemistry |
Abstract: | 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 |
Fulltext version: | Published version |
License (according to publishing contract): | Licence according to publishing contract |
Departement: | Life Sciences and Facility Management |
Organisational Unit: | Institute of Chemistry and Biotechnology (ICBT) |
Appears in collections: | 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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