nature 2009

We found that certain DNA sequences recognize specific carbon nanotubes.  This was discovered by X. Tu and M. Zheng: they have identified about >20 such special sequences.  Using these, one can separate out each and every semiconducting CNT species from a mixture.  The basis for recognition, we propose, is the formation of an ordered DNA structure stabilized by the CNT core.  We have found that anti-parallel DNA strands can organize into ordered sheets similar to the beta-sheet structure of poly-peptides.  Moreover, these can be rolled into barrels that resemble the protein beta-barrels.

“DNA sequence motifs for structure-specific recognition and separation of carbon nanotubes”, Xiaomin Tu, Suresh Manohar, Anand Jagota, Ming Zheng, Nature v 460 250-253 (2009).