Abstract
Solid-state nanopores are generally considered as an indispensable element in the research field of fundamental ion transport and molecular sensing. The improvement in fabrication and chemical modification of the solid-state nanopores remains increasingly updated. During the last decades, numerous works have been reported on the nanopore-based sensing applications. More and more new analytical methods using nanopore-based devices are emerging. In this review, we highlight the recent progress on the analytical methods for the interdisciplinary and fast-growing area of nanopore research. According to the different types of the electrical readout, whether it is steady-state ionic current or transient current fluctuation, the nanopore-based sensing and analysis can be generally divided into two categories. For the first type, the electrical readout shows a stable blockade or reopening of the nanopore conductance in the presence of target analytes, termed steady-state analysis, including the conductance change, electrochemical analysis, and two-dimensional scanning and imaging. The other type is based on the transient fluctuation in the transmembrane ionic current, termed transient-state analysis, including the noise analysis, transient ion transport, and transverse tunneling current. The investigation of solid-state nanopores for chemical sensing is just in its infancy. For further research work, not only new nanopore materials and chemical modifications are needed, but also other non-electric-based sensing techniques should be developed. We will focus our future research in the framework of bio-inspired, smart, multiscale interfacial materials and extend the spirit of binary cooperative complementary nanomaterials.
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Acknowledgments
This work was supported by the National Basic Research Program of China (2011CB935700) and the National Natural Science Foundation of China (21103201, 11290163, 91127025, 21121001). The Chinese Academy of Sciences is gratefully acknowledged under the Key Research Program of the Chinese Academy of Sciences (KJZD-EW-M01). Wei Guo is supported by Beijing Nova Program.
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Jiang, Y., Guo, W. Nanopore-based sensing and analysis: beyond the resistive-pulse method. Sci. Bull. 60, 491–502 (2015). https://doi.org/10.1007/s11434-015-0739-6
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DOI: https://doi.org/10.1007/s11434-015-0739-6