Successful development of graphene flexible bioelectrode array

Recently, the Beijing Science and Technology Plan project “Development of Graphene Flexible Bioelectrode Array” undertaken by the research team of Fang Ying, a member of the National Nanoscience Center, passed the acceptance of the expert group.

At present, the commonly used neuroelectric signal acquisition technologies include EEG, cortical EEG and deep EEG, but there are insufficient precision, craniotomy is needed, brain tissue is destroyed during implantation, and relatively large trauma is caused. Graphene flexible bioelectrode has good conductivity, light transmittance, flexibility and biocompatibility, and is one of the ideal materials for preparing bioelectrodes.

The National Nanoscience Center Fangying Group developed a flexible graphene field effect transistor electrode array using micro-nano processing technology. The prepared graphene flexible electrode array has a potential resolution of 10 microvolts and a bending angle of more than 90 degrees at 100 micrometers. It has good biocompatibility and is certified by a third-party testing agency to meet national standards. In the next step, the research team will carry out research on expanding the array density of graphene flexible nerve electrodes and reducing the electrode size of individual graphene.