Nanocomposite polymeric electrolytes to record electrophysiological brain signals in prolonged, unconventional or extreme conditions

Silvia Licoccia*, M. Luisa Di Vona, Paola Romagnoli, Livio Narici, Massimo Acquaviva, Simone Carozzo, Stefano Di Marco, Moreno Saturno, Walter G. Sannita, Enrico Traversa

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Chemically stable nanocomposite iono-conducting polymeric membranes (based on lithium salts and nanocrystalline oxide powders dispersed in a polymethyl methacrylate matrix) performed successfully in the recording of human brain responses to visual stimulation. Impedance was higher than that of conventional electrodes. However, the electrophysiological signals recorded by acid Al2O3 and neutral Al2O3 5 wt.% and 10 wt.% nanocomposite gel electrolytes were comparable to those obtained with standard electrodes, even without preliminary skin cleaning and in the absence of gel electrolytes allowing better contact with and skin-electrode ionic conductance. The electrochemical and mechanical characteristics of these membranes make them fit for human and animal research, for clinical application (specifically in emergencies, prolonged electrophysiological recordings), or in unconventional or extreme conditions when fluid electrolytes are unsuitable (e.g., biomedical space research).

Original languageEnglish (US)
Pages (from-to)531-536
Number of pages6
JournalActa Biomaterialia
Volume2
Issue number5
DOIs
StatePublished - Sep 1 2006

Keywords

  • Biological polymers and assemblies
  • EEG
  • Electrodes
  • Impedance
  • Nanocomposites
  • Visual evoked responses

ASJC Scopus subject areas

  • Biotechnology
  • Biomaterials
  • Biochemistry
  • Biomedical Engineering
  • Molecular Biology

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