Actuators that can directly convert other forms of environmental energy into mechanical work offer great application prospects in intriguing energy applications and smart devices. But to-date, low cohesion strength of...Actuators that can directly convert other forms of environmental energy into mechanical work offer great application prospects in intriguing energy applications and smart devices. But to-date, low cohesion strength of the interface and humidity responsive actuators primarily limit their applications. Herein, by experimentally optimizing interface of bimorph structure, we build graphene oxide/ethyl cellulose bidirectional bending actuators — a case of bimorphs with fast and reversible shape changes in response to environmental humidity gradients. Meanwhile, we employ the actuator as the engine to drive piezoelectric detector. In this case, graphene oxide and ethyl cellulose are combined with chemical bonds, successfully building a bimorph with binary synergy strengthening and toughening. The excellent hygroscopicity of graphene oxide accompanied with huge volume expansion triggers giant moisture responsiveness greater than 90 degrees. Moreover, the open circuit voltage of piezoelectric detector holds a peak value around 0.1 V and exhibits excellent reversibility. We anticipate that humidity-responsive actuator and detector hold promise for the application and expansion of smart devices in varieties of multifunctional nanosystems.展开更多
基金This work was financially supported by the Natural Science Foundation of China(21925110,21890751,91745113)the National Program for Support of Top-Notch Young Professionals+9 种基金USTC Research Funds of the Double First-Class Initiative(YD2060002004)the Key R&D Program of Shandong Province(2021CXGC010302)the Major Program of Development Foundation of Hefei Center for Physical Science and Technology(2016FXZY001)the Users with Excellence Project of Hefei Science Center CAS(2021HSCUE004)the Strategic Priority Research Program of the Chinese Academy of Sciences(XDB36000000)the Anhui Provincial Natural Science Foundation(1808085MB26)The authors also appreciate the support from the beamline 1W1B of Beijing Synchrotron Radiation Facility(BSRF,Beijing,China)the beam-lines BL11U,BL10B,and BL12B-a of National Synchrotron Radiation Laboratory(NSRL,Hefei,China)the fellowship of China National Postdoctoral Program for Innovative Talents(BX2021280)the fellowship of China Postdoctoral Science Foundation(2022M710141).
基金financially supported by the National Basic Research Program of China (2015CB932302)National Natural Science Foundation of China (U1432133, 11621063, 21701164)+2 种基金National Program for Support of Top-notch Young Professionalsthe Fundamental Research Funds for the Central Universities (WK2060190084, WK2060190058)supported from the Major/Innovative Program of Development Foundation of Hefei Center for Physical Science and Technology
文摘Actuators that can directly convert other forms of environmental energy into mechanical work offer great application prospects in intriguing energy applications and smart devices. But to-date, low cohesion strength of the interface and humidity responsive actuators primarily limit their applications. Herein, by experimentally optimizing interface of bimorph structure, we build graphene oxide/ethyl cellulose bidirectional bending actuators — a case of bimorphs with fast and reversible shape changes in response to environmental humidity gradients. Meanwhile, we employ the actuator as the engine to drive piezoelectric detector. In this case, graphene oxide and ethyl cellulose are combined with chemical bonds, successfully building a bimorph with binary synergy strengthening and toughening. The excellent hygroscopicity of graphene oxide accompanied with huge volume expansion triggers giant moisture responsiveness greater than 90 degrees. Moreover, the open circuit voltage of piezoelectric detector holds a peak value around 0.1 V and exhibits excellent reversibility. We anticipate that humidity-responsive actuator and detector hold promise for the application and expansion of smart devices in varieties of multifunctional nanosystems.
