期刊
ACS NANO
卷 7, 期 2, 页码 1408-1414出版社
AMER CHEMICAL SOC
DOI: 10.1021/nn3051677
关键词
nanopore; DNA; translocation speed; single molecule; self-assembled monolayer; silane
类别
资金
- National Institutes of Health [R01-HG005871, R01-HG002776]
- National Science Foundation [DMR 1105362]
- AFOSR [FA9550-10-1-0159]
- Materials Research Science and Engineering Center at the University of Massachusetts, Amherst
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1104362] Funding Source: National Science Foundation
Controlling DNA translocation speed is critically Important for nanopore sequencing as free electrophoretic threading Is far too rapid to resolve individual bases. A number of promising strategies have been explored in recent years, largely driven by the demands of next-generation sequencing. Engineering DNA nanopore interactions (known to dominate translocation dynamics) with organic coatings is an attractive method as it does not require sample modification, processive enzymes, or complicated and expensive fabrication steps. In this work, we show for the first time 4-fold tuning of unfolded, single-file translocation time through small, amine-functionalized solid-state nanopores by varying the solution pH in situ. Additionally, we develop a simple analytical model based on electrostatic interactions to explain this effect which will be a useful tool in designing future devices and experiments.
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