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Near-infrared photo-responsive flexible electrode adaptive fit: (a, d) before near-infrared light, and (b, c, e) near-infrared light attached to different surfaces 
China Instrument Network Instrument R&D Recently, Du Xuemin, a research associate of the Department of Micro-Nano Systems and Bionics Research Center of the Institute of Advanced Technology, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, successfully implemented adaptive three-dimensional deformation of near-infrared light triggered flexible electronic devices. , and adhere closely to the surface of the substrate with different curvature, and completely maintain the circuit connectivity. Photothermally Triggered Shape-adaptable 3D Flexible Electronics has been published online in Wiely's journal Advanced Materials Technologies (DOI: 10.1002/admt). .201700120) and apply for 1 invention patent and 1 international PCT.
Flexible electrodes can be used for stimulating nerve tissue or recording nerve signals (such as electrocardiogram, brain electricity, cortical electrical signals, etc.), and can be widely used in the fields of neurological rehabilitation, brain scientific research and other medical and life sciences, and are very important researches. Medical tools. As a bridge connecting the circuit system with the nervous tissue, how to ensure the close fit between the flexible electrode and the biological system to promote effective information exchange is a major challenge for the wearer and implanted electronic device to achieve effectiveness, reliability, and stability.
Near-infrared photo-induced flexible three-dimensional deformation of the flexible electrode: (a, d, g) before the near-infrared illumination, the functionalized electrode is a planar structure; (b, e, h) after the near-infrared illumination, the functionalized electrode produces three-dimensional distortion; (c, f, i) Three-dimensional flexible electrodes can be closely attached to complex surfaces after near-infrared illumination
In order to solve the above problems, Du Xuemin proposed a new type of functionalized flexible electrode design concept, and successfully developed three-dimensional shape adaptive changes that can be triggered by near-infrared light with members of the research group Cui Huanqing, Zhao Qilong, and artificial retina team member Wu Tianzhu. Functional flexible electrode. The team members broke through the traditional electrode design ideas, innovatively designed the bionic smart material with light-heat response characteristics to the back of the flexible electrode, realized the controllable bending deformation of the remote near-infrared illumination flexible electrode, and could be attached to the surface with different curvatures. . On this basis, the team members designed a gradient cross-linked structure on the photo-thermal response material layer on the back of the flexible electrode by a one-step photolithographic polymerization method, and realized that the flexible electrode can be converted from a planar structure to a complex three-dimensional one under near-infrared light illumination. Structures (cylinders, spirals, etc.). The results of the study indicate that after 10 times of deformation, this functionalized flexible electrode can still ensure the integrity of the electrode.
The team realized the adaptive and remote control of the shape of flexible electronic devices through the design of bionic intelligent materials, which not only solved the challenges of effective information exchange between flexible electrodes and biological systems, but also integrated sensor detection and drug release into functions for the future. The possibility of providing a flexible electrode provides a universal method for the design of a new generation of intelligent flexible electronic devices. The research results are expected to be used in wearable and implantable electronic devices, as well as in the field of medical and life sciences such as neurological rehabilitation and brain-computer interface.
The research was supported by a number of projects including the National Natural Science Foundation of China, the Ministry of Science and Technology, the Innovation Team of Guangdong Province, the Special Support Plan of Guangdong Province, and the Shenzhen Peacock Team.
(Original title: Shenzhen Advanced Institute Implements Near-infrared Light-triggered Flexible Electronic Devices Adaptive Three-Dimensional Deformation)