Control of local ion transport to create unique functional nanodevices based on ionic conductors

Kazuya Terabe*, Tsuyoshi Hasegawa, Changhao Liang, Masakazu Aono

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

33 Citations (Scopus)


The development of nanometer-scale devices operating under a new principle that could overcome the limitations of current semiconductor devices has attracted interest in recent years. We propose that nanoionic devices that operate by controlling the local transport of ions are promising in this regard. It is possible to control the local transport of ions using the solid electrochemical properties of ionic and electronic mixed conductors. As an example of this concept, here, we report a method of controlling the transport of silver ions of the mixed-conductor silver sulfide (Ag2S) crystal and basic research on nanoionic devices based on this mixed conductor. These devices show unique functions such as atom deposition, resistance switching, and quantum point contact switching. The switches operate through the formation and dissolution of an atomic bridge between the electrodes, and the behavior is realized by control of the local solid-state electrochemical reaction. Potential nanoionic devices utilizing the unique functions and characters that do not exist in conventional semiconductor devices are discussed.

Original languageEnglish
Pages (from-to)536-542
Number of pages7
JournalScience and Technology of Advanced Materials
Issue number6
Publication statusPublished - 2007 Sept
Externally publishedYes


  • Atomic switch
  • Mixed conductor
  • Nanoionics
  • Nanowire
  • Scanning tunneling microscopy

ASJC Scopus subject areas

  • Materials Science(all)


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