Dynamics of simultaneous, single ion transport through two single-walled carbon nanotubes: observation of a three-state system.

Citation data:

Journal of the American Chemical Society, ISSN: 1520-5126, Vol: 133, Issue: 2, Page: 203-5

Publication Year:
2011
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Citations 17
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Repository URL:
http://scholarworks.unist.ac.kr/handle/201301/12304
PMID:
21166470
DOI:
10.1021/ja108011g
Author(s):
Choi, Wonjoon, Lee, Chang Young, Ham, Moon-Ho, Shimizu, Steven, Strano, Michael S.
Publisher(s):
American Chemical Society (ACS), AMER CHEMICAL SOC
Tags:
Chemistry, Chemical Engineering, Biochemistry, Genetics and Molecular Biology, DNA, NANOPORES, CHANNELS
article description
The ability to actively manipulate and transport single molecules in solution has the potential to revolutionize chemical synthesis and catalysis. In previous work, we developed a nanopore platform using the interior of a single-walled carbon nanotube (diameter = 1.5 nm) for the Coulter detection of single cations of Li(+), K(+), and Na(+). We demonstrate that as a result of their fabrication, such systems have electrostatic barriers present at their ends that are generally asymmetric, allowing for the trapping of ions. We show that above this threshold bias, traversing the nanopore end is not rate-limiting and that the pore-blocking behavior of two parallel nanotubes follows an idealized Markov process with the electrical potential. Such nanopores may allow for high-throughput linear processing of molecules as new catalysts and separation devices.

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