μ-Foil Polymer Electrode Array for Intracortical Neural Recordings

Research output: Contribution to journalArticle

Abstract

We have developed a multichannel electrode array—termed μ-foil—that comprises ultrathin and flexible electrodes protruding from a thin foil at fixed distances. In addition to allowing some of the active sites to reach less compromised tissue, the barb-like protrusions that also serves the purpose of anchoring the electrode array into the tissue. This paper is an early evaluation of technical aspects and performance of this electrode array in acute in vitro/in vivo experiments. The interface impedance was reduced by up to two decades by electroplating the active sites with platinum black. The platinum black also allowed for a reduced phase lag for higher frequency components. The distance between the protrusions of the electrode array was tailored to match the architecture of the rat cerebral cortex. In vivo acute measurements confirmed a high signal-to-noise ratio for the neural recordings, and no significant crosstalk between recording channels.

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Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Medical Materials
  • Other Biological Topics

Keywords

  • Biomedical electrodes, brain–computer interfaces, implantable biomedical devices, microelectrodes, neural engineering, polymers.
Original languageEnglish
JournalTranslational Engineering in Health and Medicine, IEEE Journal of
Volume2
StatePublished - 2014
Peer-reviewedYes

Related research output

Köhler, P. 2016 Neuronano Research Center (NRC). 76 p.

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