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Neutron reflectomet...
Neutron reflectometry of anionic surfactants on sapphire : A strong maximum in the adsorption near the critical micelle concentration
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- Li, Ning Ning (författare)
- Univ Oxford, Dept Chem, Phys & Theoret Chem Lab, S Parks Rd, Oxford OX1 3QZ, England.
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- Thomas, Robert K. (författare)
- Univ Oxford, Dept Chem, Phys & Theoret Chem Lab, S Parks Rd, Oxford OX1 3QZ, England.
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- Rennie, Adrian R. (författare)
- Uppsala universitet,Materialfysik
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Univ Oxford, Dept Chem, Phys & Theoret Chem Lab, S Parks Rd, Oxford OX1 3QZ, England Materialfysik (creator_code:org_t)
- Elsevier BV, 2016
- 2016
- Engelska.
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Ingår i: Journal of Colloid and Interface Science. - : Elsevier BV. - 0021-9797 .- 1095-7103. ; 471, s. 81-88
- Relaterad länk:
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https://urn.kb.se/re...
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visa fler...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- The adsorption of the anionic surfactants, lithium, sodium and cesium dodecylsulfates, and sodium decylsulfonate, on the positively charged C-plane (0001) of sapphire (alumina) has been measured using neutron reflection. For each of the four surfactants there is a strong maximum in the adsorption at about the critical micelle concentration. The maximum becomes more marked from lithium to cesium. The measurements were reproduced over a range of different physical conditions and could not be accounted for in terms of impurities. The maximum is explained quantitatively by using the combination of a mass action model to calculate the mean activity of the surfactant, and a cooperative model of the adsorption (Frumkin), in which saturation of the layer is not attained until well above the critical micelle concentration.
Ämnesord
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
Nyckelord
- Surfactant adsorption
- Solid-liquid interface
- Adsorption maximum
- Sodium dodecylsulfate
- Neutron reflection
- Adsorption isotherm
- Charged surface
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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