Brainmask:an ultrasoft and moist microelectrocorticography electrode for accurate positioning and long-lasting recordings  

作　　者：Bowen Ji Fanqi Sun Jiecheng Guo Yuhao Zhou Xiaoli You Ye Fan Longchun Wang Mengfei Xu Wen Zeng Jingquan Liu Minghao Wang Huijing Hu Honglong Chang 

机构地区：[1]Unmanned System Research Institute,Northwestern Polytechnical University,Xi’an 710072,China [2]Ministry of Education Key Laboratory of Micro and Nano Systems for Aerospace,School of Mechanical Engineering,Northwestern Polytechnical University,Xi’an 710072,China [3]Collaborative Innovation Center of Northwestern Polytechnical University,Shanghai 201108,China [4]Institute of Medical Research,Northwestern Polytechnical University,Xi’an 710072,China [5]College of Electronics and Information,Hangzhou Dianzi University,Hangzhou 310018,China [6]National Key Laboratory of Science and Technology on Micro/Nano Fabrication,Department of Micro/Nano Electronics,Shanghai Jiao Tong University,Shanghai 200240,China

出　　处：《Microsystems & Nanoengineering》2023年第5期295-307,共13页微系统与纳米工程（英文）

基　　金：the support received from the Science and Technology Innovation 2030-Major Project(2022ZD0208601);National Natural Science Foundation of China(62104056,62204204);Shanghai Sailing Program(21YF1451000);Key Research and Development Program of Shaanxi(2022GY-001);Natural Science Foundation of Shaanxi province(2022-JM482,2023-JC-YB-306)。

摘　　要：Bacterial cellulose(BC),a natural biomaterial synthesized by bacteria,has a unique structure of a cellulose nanofiberweaved three-dimensional reticulated network.BC films can be ultrasoft with sufficient mechanical strength,strong water absorption and moisture retention and have been widely used in facial masks.These films have the potential to be applied to implantable neural interfaces due to their conformality and moisture,which are two critical issues for traditional polymer or silicone electrodes.In this work,we propose a micro-electrocorticography(micro-ECoG)electrode named“Brainmask”,which comprises a BC film as the substrate and separated multichannel parylene-C microelectrodes bonded on the top surface.Brainmask can not only guarantee the precise position of microelectrode sites attached to any nonplanar epidural surface but also improve the long-lasting signal quality during acute implantation with an exposed cranial window for at least one hour,as well as the in vivo recording validated for one week.This novel ultrasoft and moist device stands as a next-generation neural interface regardless of complex surface or time of duration.

关 键 词：RECORDING ELECTRODE MOISTURE 

分 类 号：TB383[一般工业技术—材料科学与工程]