Enhanced stability and controllability of an ionic diode based on funnel-shaped nanochannels with an extended critical region

Kai Xiao, Ganhua Xie, Zhen Zhang, Xiang-Yu Kong, Qian Liu, Pei Li, Liping Wen, Lei Jiang

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67 Citations (Scopus)


A study is conducted to report an enhanced stability and controllability of ionic diode based on funnel-shaped nanochannels with a much longer critical region, which are nanosized and different with other micrometer funnel-shaped nanochannels. The polarity of ion transport switching from anion/cation-selective to ambipolar can be controlled by tuning the length and charge of the critical region. This nanofluidic structure offers a simple and flexible approach for controlling the preferential conduction of ions in fluids and has potential applications in single-molecule biosensing, water resource monitoring, and health care.

Original languageEnglish
Pages (from-to)3345-3350
Number of pages6
JournalAdvanced Materials
Issue number17
Publication statusPublished - 4 May 2016
Externally publishedYes


  • Funnel-shaped
  • Ion rectification
  • Ionic diodes
  • Nanochannels
  • Nanopores

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