期刊
ACS APPLIED MATERIALS & INTERFACES
卷 13, 期 35, 页码 41968-41977出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.1c08722
关键词
bistable actuator; reconfigurable structures; 3D electronics; solvent expansion; ultraviolet (UV)/ozone treatment
资金
- Shenzhen-Hong Kong Science and Technology Innovation Cooperation Zone Shenzhen Park Project [HZQBKCZYB-2020030]
- Guangdong Provincial Department of Science and Technology (Key-Area Research and Development Program of Guangdong Province) [2020B090923002, JLFS/E-103/18]
- Hong Kong Innovation and Technology Commission via the Hong Kong Branch of National Precious Metals Material Engineering Research Center
A solvent-driven bistable actuator is proposed for reconstructing 3D electronic devices, addressing the limitations of existing strategies. The actuator can drive materials to build different 3D structures, achieve multifunctional extensions, and has been applied to electrically small antennas.
Existing strategies for reconfigurable three-dimensional (3D) electronics are greatly constrained by either the complicated driven mechanisms or harsh demands for conductive materials. Developing a simple and robust strategy for 3D electronics reconstruction and function extension remains a challenge. Here, we propose a solvent-driven bistable actuator, which acts as a substrate to reconstruct the combined 3D electronic device. Extraction of silicon oil from a hybrid poly(dimethylsiloxane) (PDMS) circle sheet buckles the dish to a bistable structure. The ultraviolet (UV)/ozone treatment on one surface of the PDMS structure introduces an oxidized layer, yielding a bilayered, solvent-driven bistable smart actuator. The snap-back stimulus to the oxidized layer differs from the snap-through stimulus. Experimental and numerical studies reveal the fundamental regulations for buckling configurations and the bistable behavior of the actuator. The prepared bistable actuator drives the bonded kirigami polyimide (PI) sheets to diverse 3D structures from the original bending configuration, reversibly. A frequency-reconfigurable electrically small monopole antenna is presented as a demonstration, which paves a way for the applications of this actuator in the field of reconfigurable 3D electronics.
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