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  • Title: Racemic single-walled carbon nanotubes exhibit circular dichroism when wrapped with DNA.
    Author: Dukovic G, Balaz M, Doak P, Berova ND, Zheng M, McLean RS, Brus LE.
    Journal: J Am Chem Soc; 2006 Jul 19; 128(28):9004-5. PubMed ID: 16834352.
    Abstract:
    We have found that racemic mixtures of chiral single-walled nanotubes (SWNTs) wrapped with d(GT)20 DNA oligomer exhibit circular dichroism (CD). We attribute the CD signal to induced CD arising from the coupling of transition moments of the SWNTs and the DNA. Although the nanotube mixture appears to contain both enantiomers in equal amounts, DNA-SWNT transition moment interaction is more constructive for one SWNT enantiomer over the other, resulting in an overall CD signal.
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