Adsorbed layer structure of cationic gemini and corresponding monomeric surfactants on mica
Identifieur interne : 001C83 ( PascalFrancis/Curation ); précédent : 001C82; suivant : 001C84Adsorbed layer structure of cationic gemini and corresponding monomeric surfactants on mica
Auteurs : Franck P. Duval [Australie] ; Raoul Zana [France] ; Gregory G. Warr [Australie]Source :
- Langmuir [ 0743-7463 ] ; 2006.
Descripteurs français
- Pascal (Inist)
English descriptors
- KwdEn :
Abstract
We report a comprehensive study of the adsorbed layer morphologies of cationic gemini surfactants of the type dodecanediyl-a,w-bis(dimethylalkylammonium bromide) and their corresponding monomers, dimethyldodecylalkylammonium bromide, on mica using atomic force microscopy soft-contact imaging. As in the bulk, aggregate curvature of the adsorbed geminis is found to increase with increasing spacer length, but the adsorbed aggregate curvature also increases in the presence of CsCl and CsBr. The monomeric surfactants exhibit an unexpected transition from globular adsorbed aggregates to a bilayer when the alkyl side chain reaches butyl, and this transition is also sensitive to added electrolyte.
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<author><name sortKey="Duval, Franck P" sort="Duval, Franck P" uniqKey="Duval F" first="Franck P." last="Duval">Franck P. Duval</name>
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<author><name sortKey="Zana, Raoul" sort="Zana, Raoul" uniqKey="Zana R" first="Raoul" last="Zana">Raoul Zana</name>
<affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Institut Charles Sadron (CNRS-ULP), 6 rue Boussingault</s1>
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<author><name sortKey="Warr, Gregory G" sort="Warr, Gregory G" uniqKey="Warr G" first="Gregory G." last="Warr">Gregory G. Warr</name>
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<term>Bromides</term>
<term>Cationic surfactant</term>
<term>Curvature</term>
<term>Electrolyte</term>
<term>Gemini surfactant</term>
<term>Imaging</term>
<term>Mica</term>
<term>Monomer</term>
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<term>Microscopie force atomique</term>
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<term>Agrégat</term>
<term>Courbure</term>
<term>Couche bimoléculaire</term>
<term>Alkyle</term>
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<front><div type="abstract" xml:lang="en">We report a comprehensive study of the adsorbed layer morphologies of cationic gemini surfactants of the type dodecanediyl-a,w-bis(dimethylalkylammonium bromide) and their corresponding monomers, dimethyldodecylalkylammonium bromide, on mica using atomic force microscopy soft-contact imaging. As in the bulk, aggregate curvature of the adsorbed geminis is found to increase with increasing spacer length, but the adsorbed aggregate curvature also increases in the presence of CsCl and CsBr. The monomeric surfactants exhibit an unexpected transition from globular adsorbed aggregates to a bilayer when the alkyl side chain reaches butyl, and this transition is also sensitive to added electrolyte.</div>
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<fC01 i1="01" l="ENG"><s0>We report a comprehensive study of the adsorbed layer morphologies of cationic gemini surfactants of the type dodecanediyl-a,w-bis(dimethylalkylammonium bromide) and their corresponding monomers, dimethyldodecylalkylammonium bromide, on mica using atomic force microscopy soft-contact imaging. As in the bulk, aggregate curvature of the adsorbed geminis is found to increase with increasing spacer length, but the adsorbed aggregate curvature also increases in the presence of CsCl and CsBr. The monomeric surfactants exhibit an unexpected transition from globular adsorbed aggregates to a bilayer when the alkyl side chain reaches butyl, and this transition is also sensitive to added electrolyte.</s0>
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<s5>01</s5>
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<s2>FX</s2>
<s5>02</s5>
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<s5>02</s5>
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<s5>02</s5>
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<s5>03</s5>
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<s5>03</s5>
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<s5>05</s5>
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<s5>05</s5>
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<s5>05</s5>
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<s5>06</s5>
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<s5>06</s5>
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<s5>06</s5>
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<s5>07</s5>
</fC03>
<fC03 i1="07" i2="X" l="ENG"><s0>Monomer</s0>
<s5>07</s5>
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<s5>07</s5>
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<s5>08</s5>
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<s5>08</s5>
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<s5>09</s5>
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<s5>09</s5>
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<fC03 i1="09" i2="X" l="SPA"><s0>Formación imagen</s0>
<s5>09</s5>
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<s5>10</s5>
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<s5>10</s5>
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<s5>10</s5>
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<s5>11</s5>
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<s5>11</s5>
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<s5>11</s5>
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<s5>12</s5>
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<s5>12</s5>
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<s5>12</s5>
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<s5>13</s5>
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<s5>13</s5>
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<s5>13</s5>
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<s5>14</s5>
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<s5>14</s5>
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<s5>14</s5>
</fC03>
<fC03 i1="15" i2="X" l="FRE"><s0>Agent surface gemini</s0>
<s4>CD</s4>
<s5>96</s5>
</fC03>
<fC03 i1="15" i2="X" l="ENG"><s0>Gemini surfactant</s0>
<s4>CD</s4>
<s5>96</s5>
</fC03>
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<s5>15</s5>
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<s5>15</s5>
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<s5>15</s5>
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<fN21><s1>156</s1>
</fN21>
<fN44 i1="01"><s1>OTO</s1>
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