The rectification of mono- and bivalent ions in single conical nanopores

作者：Wei, Junzhe; Du, Guanghua^*; Guo, Jinlong; Li, Yaning; Liu, Wenjing; Yao, Huijun; Zhao, Jing; Wu, Ruqun; Chen, Hao; Ponomarov, Artem

来源：Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms , 2017, 404: 219-223.

DOI：10.1016/j.nimb.2016.12.015

• Single conical nanopores
• Rectification
• Mono- and bivalent ions

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.

• 出版日期2017-8-1
• 单位中国科学院近代物理研究所; 中国科学院大学; 兰州大学