Evolution toward the X phase of fatty acid Langmuir monolayers on a divalent cation solution

The structure of docosanoic acid monolayers spread over chloride salt solutions of copper was investigated by means of isotherm measurements, grazing incidence X-ray diffraction, and Brewster angle microscopy, as a function of the ion concentration and at two subphase pHs (5.5 and 7.5). The X phase...

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Veröffentlicht in:Langmuir : the ACS journal of surfaces and colloids. - 1992. - 26(2010), 2 vom: 19. Jan., Seite 830-7
1. Verfasser: Cantin, Sophie (VerfasserIn)
Weitere Verfasser: Péralta, Sébastien, Fontaine, Philippe, Goldmann, Michel, Perrot, Françoise
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2010
Zugriff auf das übergeordnete Werk:Langmuir : the ACS journal of surfaces and colloids
Schlagworte:Journal Article Cations, Divalent Fatty Acids Membranes, Artificial Solutions Copper 789U1901C5 behenic acid H390488X0A
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245 1 0 |a Evolution toward the X phase of fatty acid Langmuir monolayers on a divalent cation solution 
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520 |a The structure of docosanoic acid monolayers spread over chloride salt solutions of copper was investigated by means of isotherm measurements, grazing incidence X-ray diffraction, and Brewster angle microscopy, as a function of the ion concentration and at two subphase pHs (5.5 and 7.5). The X phase is evidenced immediately above a concentration threshold which depends on the pH. The sequence of phases leading to this rigid phase involves two different processes depending on the pH. The initial L(2h) phase evolves toward an X-like phase through a phase transition which is first order at pH 7.5 while it is second order at pH 5.5. The transition is then followed by a continuous evolution toward the X phase 
650 4 |a Journal Article 
650 7 |a Cations, Divalent  |2 NLM 
650 7 |a Fatty Acids  |2 NLM 
650 7 |a Membranes, Artificial  |2 NLM 
650 7 |a Solutions  |2 NLM 
650 7 |a Copper  |2 NLM 
650 7 |a 789U1901C5  |2 NLM 
650 7 |a behenic acid  |2 NLM 
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700 1 |a Péralta, Sébastien  |e verfasserin  |4 aut 
700 1 |a Fontaine, Philippe  |e verfasserin  |4 aut 
700 1 |a Goldmann, Michel  |e verfasserin  |4 aut 
700 1 |a Perrot, Françoise  |e verfasserin  |4 aut 
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