Encapsulation of carbon nanotubes by self-assembling peptide amphiphiles

Michael S. Arnold, Mustafa O. Guler, Mark C. Hersam, Samuel I. Stupp

Research output: Contribution to journalArticle

111 Citations (Scopus)

Abstract

We demonstrate the dispersion and noncovalent functionalization of carbon nanotubes in water using peptide amphiphiles each consisting of a short hydrophobic alkyl tail coupled to a more hydrophilic peptide sequence. The assembly of peptide amphiphile molecules on the surfaces of carbon nanotubes adds biofunctionality to these one-dimensional conductors and simultaneously eliminates the hydrophobic nanotube-water interface, thus dispersing them in the aqueous medium. This should occur without the degradation of their structural, electronic, and optical properties caused by covalent functionalization and without the need for specific peptide sequences designed to bind with nanotube surfaces. The encapsulation by peptide amphiphiles is confirmed using transmission electron microscopy and optical absorbance spectroscopy and may have significant future applications in biosensing or medicine.

Original languageEnglish
Pages (from-to)4705-4709
Number of pages5
JournalLangmuir
Volume21
Issue number10
DOIs
Publication statusPublished - May 10 2005

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ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

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