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- W2068403135 abstract "The unique structure and properties of DNA-wrapped single-walled carbon nanotubes (DNA-CNTs) allow solution phase sorting of nanotubes by length and chirality, and enable many fundamental studies and technological applications. However, the atomic structure of the DNA-CNT hybrid and its electrostatic behavior in solution are not well established. To probe its structure, we have measured the electrophoretic mobilities of length- and chirality-sorted (6,5) and (7,5) CNTs wrapped by poly(GT) sequences, as well as those of single- and double-stranded DNA, at different solution temperatures. We find that DNA-CNT hybrids and double-stranded DNA, which have similar diameters, also have comparable electrophoretic mobility. On the basis of these measurements, we estimate the charge density of poly(GT)-CNT to be 6.0 e−/nm for (6,5) and 6.8 e−/nm for (7,5) CNTs. These results impose constraints on structural models of DNA-CNT. We present a model of an ordered DNA barrel comprising hydrogen bonded strands that form a seamless tube around a CNT, and show that the model predicts DNA-CNT charge densities consistent with experimentally determined values." @default.
- W2068403135 created "2016-06-24" @default.
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- W2068403135 date "2009-07-01" @default.
- W2068403135 modified "2023-09-25" @default.
- W2068403135 title "Measurement of Electrostatic Properties of DNA-Carbon Nanotube Hybrids by Capillary Electrophoresis" @default.
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- W2068403135 doi "https://doi.org/10.1021/jp903197d" @default.
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