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A new technique to remove single-walled carbon nanotube (SWNT) bundles from individual SWNTs in an aqueous suspension is introduced. Fluorescence and absorbance data suggest that liquid−liquid systems preferentially trap nanotube bundles at the interface. The resulting aqueous SWNT suspensions display strong fluorescence indicative of a large population of individually suspended SWNTs. The interfacial trapping process offers a simple route to the large-scale preparation of aqueous SWNT suspensions.
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Wang et al. (2007) studied this question.
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