title: Re-shaping graphene hydrogels for effectively enhancing actuation responses.
abstract: The development of actuation-enabled materials is important for smart devices and systems. Among them, graphene with outstanding electric, thermal, and mechanical properties holds great promise as a new type of stimuli-responsive material. In this study, we developed a re-shaping strategy to construct structure-controlled graphene hydrogels for highly enhanced actuation responses. Actuators based on the re-shaped graphene hydrogel showed a much higher actuation response than that of the common graphene counterparts. On the other hand, once composited with a conducting polymer (e.g., polypyrrole), the re-shaped hybrid actuator exhibits excellent actuation behavior in response to electrochemical potential variation. Even under stimulation at a voltage as low as 0.8 V, actuators based on the re-shaped graphene-polypyrrole composite hydrogel exhibit a maximum strain response of up to 13.5%, which is the highest value reported to date for graphene-based materials.
authors.affiliation: Key Laboratory of Cluster Science, Ministry of Education of China, Beijing Key Laboratory of Photoelectric/Electrophotonic Conversion Materials, School of Chemistry, Beijing Institute of Technology, Beijing 100081, China. lqu@bit.edu.cn.
authors.forename: Jiangli
authors.initials: J
authors.lastname: Xue
authors.forename: Chuangang
authors.initials: C
authors.lastname: Hu
authors.forename: Lingxiao
authors.initials: L
authors.lastname: Lv
authors.forename: Liming
authors.initials: L
authors.lastname: Dai
authors.forename: Liangti
authors.initials: L
authors.lastname: Qu