Transparent, conformable, active multielectrode array using organic electrochemical transistors

Wonryung Lee, Dongmin Kim, Naoji Matsuhisa, Masae Nagase, Masaki Sekino, George G. Malliaras, Tomoyuki Yokota, Takao Someya

Research output: Contribution to journalArticlepeer-review

188 Citations (Scopus)


Mechanically flexible active multielectrode arrays (MEA) have been developed for local signal amplification and high spatial resolution. However, their opaqueness limited optical observation and light stimulation during use. Here, we show a transparent, ultraflexible, and active MEA, which consists of transparent organic electrochemical transistors (OECTs) and transparent Au grid wirings. The transparent OECT is made of Au grid electrodes and has shown comparable performance with OECTs with nontransparent electrodes/wirings. The transparent active MEA realizes the spatial mapping of electrocorticogram electrical signals from an optogenetic rat with 1-mm spacing and shows lower light artifacts than noise level. Our active MEA would open up the possibility of precise investigation of a neural network system with direct light stimulation.

Original languageEnglish
Pages (from-to)10554-10559
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Issue number40
Publication statusPublished - 2017 Oct 3
Externally publishedYes


  • Multielectrode array
  • Optogenetic
  • Organic electrochemical transistors
  • Thin films
  • Transparent electrode

ASJC Scopus subject areas

  • General


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