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Determination of the structure of a surfactant layer adsorbed at the silica/water interface by neutron reflection

✍ Scribed by E.M. Lee; R.K. Thomas; P.G. Cummins; E.J. Staples; J. Penfold; A.R. Rennie

Publisher: Elsevier Science
Year: 1989
Tongue: English
Weight: 575 KB
Volume: 162
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(89)85124-3

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✦ Synopsis

Neutron reflection from the solid/liquid interface has been used to determine the structure of an adsorbed layer of hexaoxyethylene glycol monododecyl ether (CIzEs) on quartz. Contrast variation experiments show that C,zEe adsorbs as a bilayer, the ethylene oxide chains forming the layers adjacent to the quartz and the bulk solution. The thickness of the hydrocarbon core of the layer was found to be 17 +_ 3 A and the area per molecule 23 + 3 A'. The ethylene oxide chain regions were 16 I 3 A thick. The average hydration number of a single ethylene oxide group was found to be 2.04 0.5.

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