期刊
出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nimb.2016.12.015
关键词
Single conical nanopores; Rectification; Mono- and bivalent ions
类别
资金
- National Natural Science Foundation of China (NSFC) [U1632271]
- Ministry of Science and Technology [2012YQ03014204]
The polyethylene terephthalate (PET) films were irradiated with single 6.9 MeV/u Ni-58(19+) ions at the Lanzhou Interdisciplinary Heavy Ion Microbeam (LIHIM), and single conical nanopores were produced by asymmetric chemical etching of the latent ion tracks. Then, the current-voltage (I-V) characteristic was measured in LiCl, NaCl, KCl, MgCl2, and CaCl2 solution at different concentrations to study the transport properties of different cations in the single conical nanopores respectively. The measured I-V data showed that the conical nanopores have rectified transportation of these cations at the applied voltage of between +2 V and -2 V. The rectification coefficient gamma of the mono- and bivalent ions was determined in their solution of 0.0001-1 M measured at 1 V, the result showed that the rectification coefficient is dependent on the valence of the ions and the electrolyte solution. (C) 2016 Elsevier B.V. All rights reserved.
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