Flexible Silver/Carbon Nanotube-Graphene Oxide-Polydimethylsiloxane Electrode Patch for Electroencephalography Language

Article; Early Access

关键词: DRY ELECTRODES;    STATE;   

DOI  :  10.1002/aisy.202300018

来源: SCIE

【 摘 要 】

A flexible silver/carbon nanotube-graphene oxide-polydimethylsiloxane (Ag/CNT-GO-PDMS) patch electrode for recording electroencephalography (EEG) signals and recognizing words is prepared. These patches record EEG signals under the synergistic sensing mechanism of the noncontact capacitance mode of the CNT-GO-PDMS patch and contact current mode of the Ag claws, with low scalp contact resistance of 6.4 k Omega. In the occipital region, the signal-to-noise ratios (SNR) are approximate to 90 dB for a-waves and 9 dB for visual-evoked signals; the SNR of auditory-evoked EEG signals in the temporal region is approximate to 10 dB. The EEG cap comprises seven Ag/CNT-GO-PDMS patches to record EEG signals in steady-state visual-evoked potentials (SSVEP) and multiple auditory steady-state response (MASSR). These patches can recognize nine words (one to nine) in the SSVEP-MASSR paradigm, with a visual accuracy of 90.4% and auditory accuracy of 54.0%. The statistical analysis also shows that the stimulation frequency and scalp channel are significant influencing factors for the accuracy of word recognition. We developed a standardized process of flexible Ag/CNT-GO-PDMS patches and herein propose a new strategy to identify words, which is of great significance for the establishment of the EEG language database and the application of EEG in the field of information transmission.