Programmable redox state of the nickel ion chain in DNA

Hsueh Liang Chu, Shao Chien Chiu, Ching Feng Sung, Wellen Tseng, Yu Chuan Chang, Wen-Bin Jian*, Yu-Chang Chen, Chiun-Jye Yuan, Hsing Yuan Li, Frank X. Gu, Massimiliano Di Ventra, Chia-Ching Chang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

17 Scopus citations


DNA is a nanowire in nature which chelates Ni ions and forms a conducting chain in its base-pairs (Ni-DNA). Each Ni ion in Ni-DNA exhibits low (Ni 2+) or high (Ni3+) oxidation state and can be switched sequentially by applying bias voltage with different polarities and writing times. The ratio of low and high oxidation states of Ni ions in Ni-DNA represents a programmable multistate memory system with an added capacitive component, in which multistate information can be written, read, and erased. This study also indicates that the biomolecule-based self-organized nanostructure can be used as a template for nanodevice fabrication.

Original languageEnglish
Pages (from-to)1026-1031
Number of pages6
JournalNano Letters
Issue number2
StatePublished - 12 Feb 2014


  • DNA
  • memory resistance systems
  • multistate memory effect
  • nanotemplate
  • nanowire system
  • Ni-DNA


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