Hexagonally Ordered Ammonium Lithocholate Self-Assembled Nanotubes with Highly Monodisperse Sections

Authors

  • P. Terech,

    1. UMR 5819, Département de Recherche Fondamentale sur la Matière Condensée, CEA-CNRS-Université Joseph Fourier, 17 rue des Martyrs, 38054 Grenoble Cedex 09, France
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  • B. Jean,

    1. European Synchrotron Radiation Facility, BP 220, 38043 Grenoble Cedex, France
    2. Present address: CERMAV-CNRS (affiliated with Joseph Fourier, University), BP 53, 38041 Grenoble Cedex 09, France
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  • F. Ne

    1. UMR 5819, Département de Recherche Fondamentale sur la Matière Condensée, CEA-CNRS-Université Joseph Fourier, 17 rue des Martyrs, 38054 Grenoble Cedex 09, France
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  • Prof. Y. Talmon (Technion, Haïfa, Israel) is specially thanked for his very active participation in the project, fruitful discussions, elaboration of the manuscript, and complementary cryo-TEM measurements. The authors are grateful to Dr. Peter Boesecke for his valuable help during the SAXS experiments. Hamid Djazouli is also acknowledged for technical assistance. ESRF (Grenoble, France) is thanked for providing access to the synchrotron beam.

Abstract

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Self-assembled nanotubes and helical aggregates are ubiquitous in nature, making them attractive targets for nanometer-scale fabrication. The effect of counterions (NH4+ vs. Na+) on the formation of self-assembled ammonium lithocholate (NH4LC) nanotubes in alkaline aqueous solutions is reported. A spectacular enhancement of the cross-sectional monodispersity of the sections is found. In addition, the tubes exhibit a strikingly well-ordered hexagonal distribution (see figure) with a moderate increase in temperature to 40–50 °C.

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