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Fabrication and electrolytic conduction of single conical nanopores

Zhu Xiao-Rui Wang Wei-Dong Qin Guang-Yong Jiao Zhen

Fabrication and electrolytic conduction of single conical nanopores

Zhu Xiao-Rui, Wang Wei-Dong, Qin Guang-Yong, Jiao Zhen
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  • Received Date:  08 October 2012
  • Accepted Date:  06 December 2012
  • Published Online:  05 April 2013

Fabrication and electrolytic conduction of single conical nanopores

  • 1. Henan key laboratory of ion beam bioengineering, Physical engineering college Zhen Zhou University, Zhengzhou 450052, China
Fund Project:  Project supported by the National Natural Science Foundation of China (Grant Nos. 30800204, 41101244).

Abstract: Single conical nanopores were fabricated by etching single-ion-irradiated polymer (ethylene terephthalate) (PET) films. The etching process was monitored by measuring the transmembrane current. A series of conical nanopores with different tip sizes were obtained at different maximum etching currents, "Imax". Results showed that it was possible to control the tip diameter by terminating etching at a certain Imax. The current-voltage characteristic of the nanopores in KCl solution was investigated. Results showed also that the ionic conduction was asymmetrical, this phenomenon is called rectification. The current rectification coefficient, was influenced by the tip size and electrolyte concentration.

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