Method of creating a nanopore-terminated probe for single-molecule enantiomer discrimination.

Method of creating a nanopore-terminated probe for single-molecule enantiomer discrimination.
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DOI:
10.1021/ac802348r
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发表时间:
2009-01-01
影响因子:
7.4
通讯作者:
Gu, Li-Qun
Gu, Li-Qun
中科院分区:
化学1区
文献类型:
--
作者:
Gao, Changlu;Ding, Shu;Tan, Qiulin;Gu, Li-Qun

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Nanopores are increasingly utilized as tools for single-molecule detection in biotechnology. Many nanopores are fabricated through procedures that require special materials, expensive facilities and experienced operators, which limiting their usefulness on a wide-scale. We have developed a simple method of fabricating a robust, low-noise nanopore by externally penetrating a nanocavity enclosed in the terminal of a capillary pipette. The nanocavity was shown to have a pore size on the scale of a single molecule, verified by translocation of molecules of known sizes, including double-stranded DNA (2 nm), gold nanoparticles (10 nm) and ring-shaped cyclodextrin (1.5 nm). The small pore size allows entrapment of a single cyclodextrin molecule. Cyclodextrin in the nanopore may prove useful as a molecular adapter for chiral enantiomer discrimination.
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