Journal
ADVANCED MATERIALS
Volume 19, Issue 7, Pages 939-+Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.200602667
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A length threshold for cell uptake of DNA-wrapped single-walled carbon nanotubes (SWNTs) by human lung fibroblasts (IMR90) is identified. Competitive uptake experiments with well-defined and characterized length fractions show that SWNTs above the length threshold are excluded from the cell, whereas SWNTs labeled with Cy3-derivatized DNA below the threshold are able to access the cell interior, as shown in the fluorescence image and on the cover.
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