Journal
NANO LETTERS
Volume 3, Issue 9, Pages 1245-1249Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl0344763
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A postsynthesis method of separating metallic from semiconducting single-walled carbon nanotubes and a method based on absorption spectroscopy for assay of the separation efficiency are described. The separation method relies on chemical discrimination in the charge-transfer complex formation between bromine and the metallic versus semiconducting nanotubes and takes advantage of the resulting density difference to effect a centrifugation-based separation. Calculations support the proposed separation mechanism.
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