Enrichment of Deuterium Oxide at Hydrophilic Interfaces in Aqueous Solutions

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...

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Published in:Langmuir 2007-11, Vol.23 (24), p.11943-11946
Main Authors: Stålgren, Johan J. R, Boschkova, Katrin, Ericsson, Jan-Christer, Frank, Curtis W, Knoll, Wolfgang, Satija, Sushil, Toney, Michael F
Format: Article
Language:English
Subjects:
Chemistry
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
Kemi
NATURAL SCIENCES
NATURVETENSKAP
Surface physical chemistry
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cited_by cdi_FETCH-LOGICAL-a454t-ea81b967d7890c9258748a7939b9ab01c06b84c5280b8b89f26ac17f4e6737423
cites cdi_FETCH-LOGICAL-a454t-ea81b967d7890c9258748a7939b9ab01c06b84c5280b8b89f26ac17f4e6737423
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container_issue 24
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container_title Langmuir
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description 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.
doi_str_mv 10.1021/la700932s
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source American Chemical Society:Jisc Collections:American Chemical Society Read & Publish Agreement 2022-2024 (Reading list)
subjects Chemistry
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
Kemi
NATURAL SCIENCES
NATURVETENSKAP
Surface physical chemistry
title Enrichment of Deuterium Oxide at Hydrophilic Interfaces in Aqueous Solutions
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