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Biomacromolecules 2008, 9, 598–602
Spontaneous Exfoliation of Single-Walled Carbon Nanotubes Dispersed Using a Designed Amphiphilic Peptide Valeria Nicolosi,† Helen Cathcart,† Alan R. Dalton,‡ Damian Aherne,§ Gregg R. Dieckmann,4 and Jonathan N. Coleman*,†,⊥ School of Physics, Trinity College Dublin, Dublin 2, Ireland, School of Electronics & Physical Sciences, University of Surrey, Surrey GU2 7XH, United Kingdom, School of Chemistry, Trinity College Dublin, Dublin 2, Ireland, Chemistry Department and Alan G. MacDiarmid NanoTech Institute, The University of Texas at Dallas, Richardson, Texas, and Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Trinity College Dublin, University of Dublin, Dublin 2, Ireland Received October 25, 2007; Revised Manuscript Received December 11, 2007
We have observed concentration dependent exfoliation of single-walled carbon nanotubes dispersed in solutions of the synthetic peptide nano-1. As the nanotube concentration is reduced, the bundle diameters tend to decrease before saturating at
