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Creator |
c3baa1aae2495d9fcf383c433b46bfe0 |
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Creator |
ext-7d4d377d93a0d65606c75b02ebd7937f |
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Creator |
ext-c16c432721196b374b08cf679e8b105e |
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Date |
2014-04-28 |
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Is Part Of |
repository |
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abstract |
When two surfaces confine water layers between them at the nanoscale, the behaviour
of these confined water molecules can deviate significantly from the behaviour of
bulk water, and it could reflect on the adhesion of such surfaces. This study assesses
the role of confined water layers on the adhesion of hydrophilic surfaces and how
sensitive this adhesion is to the presence of contaminants. Our methodology used atomic
force microscopy adhesion measurements, whereby an alumina-sputtered sphere-tipped
cantilever was interacted versus a flat alumina single crystal. Testing was performed
under immersed conditions using (i) water, (ii) water/dimethylformamide mixtures,
(iii) water/ethanol mixtures, and (iv) water/formamide mixtures. These solutions were
intended to assess the influence of dielectric constant, molecule size, and the number
of hydrogen bonding opportunities available to molecules upon confinement between
surfaces. It was found that dilute concentrations of ethanol and formamide decreased
the adhesion. In contrast, the adhesion increased in the presence of dilute concentrations
of dimethylformamide. The adhesion was attenuated by in excess of two orders of magnitude
for high concentrations of the organic solutes. |
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authorList |
authors |
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presentedAt |
ext-3ccc7aaaa2e144cada07aebd81414412 |
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status |
nonPeerReviewed |
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uri |
http://data.open.ac.uk/oro/document/319290 |
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uri |
http://data.open.ac.uk/oro/document/319298 |
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uri |
http://data.open.ac.uk/oro/document/319299 |
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uri |
http://data.open.ac.uk/oro/document/319300 |
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uri |
http://data.open.ac.uk/oro/document/319301 |
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uri |
http://data.open.ac.uk/oro/document/319302 |
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uri |
http://data.open.ac.uk/oro/document/319880 |
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type |
AcademicArticle |
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type |
Article |
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label |
Bowen, James ; Rossetto, Herbert L. and Kendall, Kevin (2014). Adhesion attenuation
and enhancement in aqueous solutions. In: Cell Adhesion Century: Culture Breakthrough,
28-29 Apr 2014, London, UK. |
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label |
Bowen, James ; Rossetto, Herbert L. and Kendall, Kevin (2014). Adhesion attenuation
and enhancement in aqueous solutions. In: Cell Adhesion Century: Culture Breakthrough,
28-29 Apr 2014, London, UK. |
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Title |
Adhesion attenuation and enhancement in aqueous solutions |
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in dataset |
oro |