Title

Organization of peptide nanotubes into macroscopic bundles

Authors

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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