A Ferroelectric Ceramic/Polymer Composite-Based Capacitive Electrode Array for In Vivo Recordings.
basic_science · Level V
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- Record sourced from PubMed, PMID 28493386.
- Also identified by DOI 10.1002/adhm.201700305.
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Abstract
A new implantable capacitive electrode array for electrocorticography signal recording is developed with ferroelectric ceramic/polymer composite. This ultrathin and electrically safe capacitive electrode array is capable of attaching to the biological tissue conformably. The barium titanate/polyimide (BaTiO<sub>3</sub> /PI) nanocomposite with high dielectric constant is successfully synthesized and employed as the ultrathin dielectric layer of the capacitive BaTiO<sub>3</sub> /PI electrode array. The performance of the capacitive BaTiO<sub>3</sub> /PI electrode array is evaluated by electrical characterization and 3D finite-element modeling. In vivo, neural experiments on the visual cortex of rats show the reliability of the capacitive BaTiO<sub>3</sub> /PI electrode array. This work shows the potentials of capacitive BaTiO<sub>3</sub> /PI electrode array in the field of brain/computer interfaces.
Medical subject headings
- Electrodes, Implanted
- Electroencephalography
- Microelectrodes
- Nanocomposites