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17 results on '"A. Anthore"'

8. Small-angle X-ray diffraction study of the thermotropic and lyotropic phases of five alkyl cyclic and acyclic disaccharides: Influence of the linkage between the hydrophilic and hydrophobic moieties

Author

R. Anthore, Isabelle Rico-Lattes, S. Louvet, C. Dupuy, X. Auvray, C. Petipas, and Armand Lattes

Subjects
chemistry.chemical_classification, Chemistry, Biophysics, Surfaces and Interfaces, General Chemistry, Thermotropic crystal, Crystallography, Lamellar phase, Liquid crystal, Phase (matter), Lyotropic, X-ray crystallography, Anhydrous, General Materials Science, Alkyl, Biotechnology
Abstract

We present a comparative study of the thermotropic and lyotropic phases of 5 surfactants with an aliphatic chain of 12 carbon atoms and a cyclic or acyclic sugar head with different linkages between the two moieties. These linkages can concern different chemical groups or different orientations between the head and the chain. The compounds included the α- and β-N dodecyl-D-maltosides, N-dodecylamino-1-deoxylactitol, N-dodecyl lactobionamide and N-acetyl N-dodecyl lactosylamine. The influence of the polar head (with closed- and opened-type sugars) and the linkage with the hydrocarbon chain on the phases obtained by the heating of the anhydrous compounds and after addition of water was studied by X-ray diffraction and optical microscopy. In the anhydrous state, the surfactants were either crystalline or amorphous. On heating, they went through a liquid crystal smectic phase which, in some cases, was preceded by solid-to-solid transitions. On addition of water, the sequence of phases from the micellar phase to the lamellar phase was accounted for in terms of the geometric model of Sadoc and Charvolin. However, with certain surfactants this sequence was not complete, and the domains of existence of phases were altered.

Published
2001

10. Controlling charge quantization with quantum fluctuations

Author

Jezouin, S., primary, Iftikhar, Z., additional, Anthore, A., additional, Parmentier, F. D., additional, Gennser, U., additional, Cavanna, A., additional, Ouerghi, A., additional, Levkivskyi, I. P., additional, Idrisov, E., additional, Sukhorukov, E. V., additional, Glazman, L. I., additional, and Pierre, F., additional

Published
2016
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16. Formamide, a water substitute XIV (1) waterless microemulsions 8. Structural analysis by X-ray scattering of CTAB aggregates in formamide and in the microemulsion system (formamide, CTAB, isooctane, 1-butanol)

Author

Isabelle Rico, A. Ahmah-Zadeh Samii, Armand Lattes, A. de Savignac, C. Petipas, X. Auvray, and R. Anthore

Subjects
Alkane, chemistry.chemical_classification, Formamide, Polymers and Plastics, Chemistry, Scattering, Butanol, Micelle, chemistry.chemical_compound, Colloid and Surface Chemistry, Hydrocarbon, Chemical engineering, Materials Chemistry, Organic chemistry, Microemulsion, Physical and Theoretical Chemistry, Aliphatic compound
Abstract

X-ray scattering was used to analyse the structures of aggregates of CTAB in various formamide-containing media.

Published
1987

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