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Enrichment of deuterium oxide at hydrophilic interfaces in aqueous solutions
YKI – Ytkemiska institutet.
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2007 (English)In: Langmuir, ISSN 0743-7463, E-ISSN 1520-5827, Vol. 23, no 24, 11943-11946 p.Article in journal (Refereed)
Abstract [en]

The structure of water at aqueous interfaces is of the utmost importance in biology, chemistry, and geology. We use neutron reflectivity and quartz crystal microbalance to probe an interface between hydrophilic quartz and bulk liquid solutions of H2O/D2O mixtures. We find that near the interface the neutron scattering length density is larger than in the bulk solution and there is an excess adsorbed mass. We interpret this as showing that there is a region adjacent to the quartz that is enriched in D2O and extends 5-10 nm into the solution. This suggests caution when interpreting results where D2O is substituted for H2O in aqueous interfacial chemistry.

Place, publisher, year, edition, pages
2007. Vol. 23, no 24, 11943-11946 p.
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-27143OAI: oai:DiVA.org:ri-27143DiVA: diva2:1054147
Note
A1873Available from: 2016-12-08 Created: 2016-12-08Bibliographically approved

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