College of Materials Science and Engineering Sichuan University Chengdu 610065 China;
College of Materials Science and Engineering Sichuan University Chengdu 610065 China;
College of Materials Science and Engineering Sichuan University Chengdu 610065 China;
College of Materials Science and Engineering Sichuan University Chengdu 610065 China;
College of Materials Science and Engineering Sichuan University Chengdu 610065 China;
College of Materials Science and Engineering Sichuan University Chengdu 610065 China;
College of Materials Science and Engineering Sichuan University Chengdu 610065 China;
sustained conductivity; electrical stimulation; carboxylic graphene oxide; polypyrrole;