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|a (NLM)15982047
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|e rakwb
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|a eng
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|a Stevens, Hallam
|e verfasserin
|4 aut
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|a Effects of degassing on the long-range attractive force between hydrophobic surfaces in water
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|c 2005
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|a Text
|b txt
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|a ohne Hilfsmittel zu benutzen
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|a Date Completed 21.08.2006
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|a Date Revised 21.11.2013
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|a published: Print
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|a Citation Status MEDLINE
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|a The long-ranged attractions between hydrophobic amorphous fluoropolymer surfaces are measured in water with and without dissolved air. An atomic force microscope is used to obtain more than 500 measured jump-in distances, which yields statistically reliable results. It is found that the range of the attraction and its variability is generally significantly decreased in deaerated water as compared to normal, aerated water. However, the range and strength of the attraction in deaerated water remain significantly greater than the van der Waals attraction for this system. The experimental observations are consistent with (1) nanobubbles being primarily responsible for the long-ranged attraction in normal water, (2) nanobubbles not being present in deaerated water when the surfaces are not in contact, and (3) the attraction in the absence of nanobubbles being most probably due to the approach to the separation-induced spinodal cavitation of the type identified by Bérard et al. [J. Chem. Phys. 1993, 98, 7236]. It is argued that the measurements in deaerated water reveal the bare or pristine hydrophobic attraction unobscured by nanobubbles
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Polymers
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|a Water
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|a 059QF0KO0R
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|a Considine, Robert F
|e verfasserin
|4 aut
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|a Drummond, Calum J
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|a Hayes, Robert A
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|a Attard, Phil
|e verfasserin
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 21(2005), 14 vom: 05. Juli, Seite 6399-405
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnns
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|g volume:21
|g year:2005
|g number:14
|g day:05
|g month:07
|g pages:6399-405
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