Jeong Sujin, Yoon Hyungsoo, Michalek Lukas Felix, Kim Geonhee, Kim Jinhyoung, Seo Jiseok, Kim Dahyun, Park Hwaeun, Lee Byeongmoon, Hong Yongtaek
Department of Electrical and Computer Engineering, Inter-University Semiconductor Research Center (ISRC), Seoul National University, Seoul, 08826, Korea.
Department of Chemical Engineering, Stanford University, Stanford, CA, 94305, USA.
Nat Commun. 2024 Aug 22;15(1):7209. doi: 10.1038/s41467-024-51585-2.
High-fidelity patterning of thin metal films on arbitrary soft substrates promises integrated circuits and devices that can significantly augment the morphological functionalities of freeform electronics. However, existing patterning methods that decisively rely on prefabricated rigid masks are severely incompatible with myriad surfaces. Here, we report printable, stretchable metal-vapor-desorption layers (s-MVDLs) that can enable high-fidelity patterning of thin metal films on freeform polymeric surfaces. The printed rubbery matrix with highly mobile chains effectively repels various metal vapors from the surface and inhibits their condensation, thereby allowing selective metal deposition. The s-MVDLs are printed by direct ink writing techniques, enabling customizable and scalable thin metal patterns ranging from the micrometer to millimeter scale with high fidelity. Furthermore, the superior stretchability and mechanical robustness of the s-MVDLs allow highly compliant deformation along the substrates, enabling the construction of unconventional circuits and devices on multi-curvature, non-developable, and stretchable surfaces.
在任意柔软基板上实现薄金属膜的高保真图案化，有望制造出能够显著增强自由形态电子产品形态功能的集成电路和器件。然而，现有的决定性地依赖预制刚性掩膜的图案化方法与无数表面严重不兼容。在此，我们报告了可印刷、可拉伸的金属蒸汽解吸层（s-MVDL），它能够在自由形态的聚合物表面实现薄金属膜的高保真图案化。具有高度可移动链的印刷橡胶基质有效地排斥表面的各种金属蒸汽并抑制其冷凝，从而实现选择性金属沉积。s-MVDL通过直接墨水书写技术进行印刷，能够以高保真度实现从微米到毫米尺度的可定制且可扩展的薄金属图案。此外，s-MVDL卓越的拉伸性和机械坚固性使其能够沿基板进行高度顺应性变形，从而能够在多曲率、不可展和可拉伸表面上构建非常规电路和器件。
