Organization of peptide nanotubes into macroscopic bundles

    Authors

    H. Matsui;G. E. Douberly

    Comments

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    Abbreviated Journal Title

    Langmuir

    Keywords

    CARBON NANOTUBES; FIBERS; Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science, ; Multidisciplinary

    Abstract

    A simple chemical method to assemble peptide nanotubes and simultaneously arrange them into macroscopic bundles is reported. The peptide nanotubes, self-assemblies of the bolaamphiphilic peptide monomer bis(N-alpha -amido-glycylglycine)-1,7-heptane dicarboxylate, appeared in acidic solution within 1 week. In the presence of Ni2+ ions, the bolaamphiphile peptide assembles into well-organized macroscopic bundles of the peptide nanotubes. Addition of EDTA to a suspension of peptide nanotube bundles resulted in disassembly of the bundles into peptide nanotubes with diameters between 40 and 140 nm. A majority of the free amide sites of the peptide nanotubes were involved in the intercalation of nickel ions, which act as bridges to bundle adjacent peptide nanotubes. The covalent bridge of Ni2+ ions with amide groups of the peptide nanotube was confirmed by Raman microscopy.

    Journal Title

    Langmuir

    Volume

    17

    Issue/Number

    25

    Publication Date

    1-1-2001

    Document Type

    Article

    Language

    English

    First Page

    7918

    Last Page

    7922

    WOS Identifier

    WOS:000172590800032

    ISSN

    0743-7463

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