Jejung Kim, Juyeong Hong, Kyungtai Park, Sangwon Lee, Anh Tuan Hoang, Sojeong Pak, Huilin Zhao, Seunghyeon Ji, Sungchil Yang, Chun Kee Chung, Sunggu Yang, Jong-Hyun Ahn
Intracranial implants for diagnosis and treatment of brain diseases have been developed over the past few decades. However, the platform of conventional implantable devices still relies on invasive probes and bulky sensors in conjunction with large-area craniotomy and provides only limited biometric information. Here, we report an implantable multi-modal sensor array that can be injected through a small hole in the skull and inherently spread out for conformal contact with the cortical surface. The injectable sensor array, composed of graphene multi-channel electrodes for neural recording and electrical stimulation and MoS2 -based sensors for monitoring intracranial temperature and pressure, was designed based on a mesh structure whose elastic restoring force enables the contracted device to spread out...
May 13, 2024: Advanced Materials