Heterostructured iro2/Au nanowire electrodes and unit recordings from Hippocampal rat brain

Hargsoon Yoon, Phillip Hankins, Sechang Oh, Robert E. Harbaugh, Vijay K. Varadan

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


This research presents the development of neural recording electrodes with high sensitivity using nanotechnology and the evaluation of their electrochemical sensing properties. Neural electrodes with heterostructured IrO2/Au nanowires have been fabricated on a flexible needle probe using a polyimide substrate. The outer, functional layer of the nanoelectrodes was made with a thin iridium oxide layer on vertically aligned Au nanowire cores providing low impedance and high charge storage capacity, which can enhance neural sensing and stimulating efficiency. Acute recording from the hippocampus of a rat brain has confirmed the neural sensing functionality of the heterostructured nanowire electrodes.

Original languageEnglish (US)
JournalJournal of Nanotechnology in Engineering and Medicine
Issue number2
StatePublished - May 2010

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Electrical and Electronic Engineering


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