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  • Title: Unique temperature-dependent supramolecular self-assembly: from hierarchical 1D nanostructures to super hydrogel.
    Author: Qiao Y, Lin Y, Yang Z, Chen H, Zhang S, Yan Y, Huang J.
    Journal: J Phys Chem B; 2010 Sep 16; 114(36):11725-30. PubMed ID: 20722403.
    Abstract:
    Supramolecular self-assembly can not only lead to a better understanding of biological systems, but also can enable rational building of complex and functional materials. In this report, hierarchical one-dimensional (1D) architectures involving nanotubes, coiled-coil ropelike structures, nanohelices, and nanoribbons are created via lanthanum-cholate supramolecular self-assembly. These sophisticated self-assemblies are proven to be mediated by temperature. The entanglement of one-dimensional nanostructures is demonstrated to give rise to fascinating "super" hydrogel, which can realize water gelation at extremely low concentration. Unprecedented water gelation behaviors, that is, heating-enhanced stiffness and heating-promoted gelation, are found in lanthanum-cholate supramolecular hydrogel. The driving forces of self-assembled complex nanostructures and the unique role of temperature are also discussed.
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