Double Barrel Nanopores as a New Tool for Controlling Single-Molecule Transport.

Double Barrel Nanopores as a New Tool for Controlling Single-Molecule Transport.
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DOI:
10.1021/acs.nanolett.8b00860
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发表时间:
2018-04-11
期刊:
影响因子:
10.8
通讯作者:
Ivanov AP
Ivanov AP
中科院分区:
材料科学1区
文献类型:
--
作者:
Cadinu P;Campolo G;Pud S;Yang W;Edel JB;Dekker C;Ivanov AP

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控制单个生物分子运动的能力是提高广泛的生物物理和诊断应用的关键。固态纳米孔是解决这一问题的一个很有前途的工具。然而,由于快速的分析物传输和低信噪比,分子控制和长聚合物分子缓慢读出的可能性仍然受到限制。在这里,我们报告了一种通过使用双纳米孔结构主动控制分析物传输的新方法,其中两个纳米孔仅相隔约20 nm的间隙。纳米孔可以单独定位,允许两种独特的操作模式:(i)孔间转移,可以以接近100%的效率控制,(ii) DNA分子桥接在两个纳米孔之间,这使得检测具有增强的时间分辨率(例如,停留时间增加超过2个数量级),而不会影响信号质量。双筒结构的制造和操作的简单性为生物分子的高分辨率读出开辟了广泛的应用。
The ability to control the motion of single biomolecules is key to improving a wide range of biophysical and diagnostic applications. Solid-state nanopores are a promising tool capable of solving this task. However, molecular control and the possibility of slow readouts of long polymer molecules are still limited due to fast analyte transport and low signal-to-noise ratios. Here, we report on a novel approach of actively controlling analyte transport by using a double-nanopore architecture where two nanopores are separated by only a ∼ 20 nm gap. The nanopores can be addressed individually, allowing for two unique modes of operation: (i) pore-to-pore transfer, which can be controlled at near 100% efficiency, and (ii) DNA molecules bridging between the two nanopores, which enables detection with an enhanced temporal resolution (e.g., an increase of more than 2 orders of magnitude in the dwell time) without compromising the signal quality. The simplicity of fabrication and operation of the double-barrel architecture opens a wide range of applications for high-resolution readout of biological molecules.
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