M. Ricci
Growth and dissolution of calcite in the presence of adsorbed stearic acid
Ricci, M.; Segura, J.J.; Erickson, B.; Fantner, G.; Stellacci, F.; Voïtchovsky, K.
Authors
J.J. Segura
B. Erickson
G. Fantner
F. Stellacci
Professor Kislon Voitchovsky kislon.voitchovsky@durham.ac.uk
Professor
Abstract
The interaction of organic molecules with the surface of calcite plays a central role in many geochemical, petrochemical and industrial processes and in biomineralization. Adsorbed organics, typically fatty acids, can interfere with the evolution of calcite when immersed in aqueous solutions. Here we use atomic force microscopy in liquid to explore in real-time the evolution of the (101 ̅4) surface of calcite covered with various densities of stearic acid and exposed to different saline solutions. Our results show that the stearic acid molecules tend to act as ‘pinning points’ on the calcite’s surface and slow down the crystal’s restructuring kinetics. Depending on the amount of material adsorbed, the organic molecules can form monolayers or bilayer islands that become embedded into the growing crystal. The growth process can also displaces the organic molecules and actively concentrate them into stacked multilayers. Our results provide molecular-level insights into the interplay between the adsorbed fatty acid molecules and the evolving calcite crystal, highlighting mechanisms that could have important implications for several biochemical and geochemical processes and for the oil industry.
Citation
Ricci, M., Segura, J., Erickson, B., Fantner, G., Stellacci, F., & Voïtchovsky, K. (2015). Growth and dissolution of calcite in the presence of adsorbed stearic acid. Langmuir, 31(27), 7563-7571. https://doi.org/10.1021/acs.langmuir.5b01732
Journal Article Type | Article |
---|---|
Acceptance Date | Jun 18, 2015 |
Publication Date | Jul 14, 2015 |
Deposit Date | Jun 23, 2015 |
Publicly Available Date | Jun 18, 2016 |
Journal | Langmuir |
Print ISSN | 0743-7463 |
Electronic ISSN | 1520-5827 |
Publisher | American Chemical Society |
Peer Reviewed | Peer Reviewed |
Volume | 31 |
Issue | 27 |
Pages | 7563-7571 |
DOI | https://doi.org/10.1021/acs.langmuir.5b01732 |
Public URL | https://durham-repository.worktribe.com/output/1435542 |
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Copyright Statement
This document is the Accepted Manuscript version of a Published Work that appeared in final form in Langmuir, copyright © 2015 American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://dx.doi.org/10.1021/acs.langmuir.5b01732.
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