The rapid development of flexible electronics necessitates simplified processes that integrate heterogeneous materials and structures. In this study, laser engraving is combined with electrochemical deposition (ECD) to directly fabricate various micro/nano-structured components and flexible electronic circuits. A theoretical framework and simulation model are developed to design the on-demand ECD on laser induced graphene (LIG), enabling the generation of multi-scale copper (Cu) materials with controllable oxidation states. The Cu-LIG composites exhibit high surface quality and reliability, meeting the requirements of flexible circuits. The study fabricates and characterizes multilayer circuits and complex functional devices, including electrochemical sensors, thin-film heaters, and wireless humidity sensors, to showcase the versatility of the LIG-ECD process. This approach can be extended to various polymer and metal deposition processes, paving the way for the development of high-performance flexible electronic devices.

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http://dx.doi.org/10.1002/smll.202408943DOI Listing

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