Printable, stretchable metal-vapor-desorption layers for high-fidelity patterning in soft, freeform electronics

Sujin Jeong, Hyungsoo Yoon, Lukas Felix Michalek, Geonhee Kim, Jinhyoung Kim, Jiseok Seo, Dahyun Kim, Hwaeun Park, Byeongmoon Lee () and Yongtaek Hong ()
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Sujin Jeong: Seoul National University
Hyungsoo Yoon: Seoul National University
Lukas Felix Michalek: Stanford University
Geonhee Kim: Seoul National University
Jinhyoung Kim: Korea Electronics Technology Institute (KETI)
Jiseok Seo: Seoul National University
Dahyun Kim: Seoul National University
Hwaeun Park: Seoul National University
Byeongmoon Lee: Daegu Gyeongbuk Institute of Science and Technology (DGIST)
Yongtaek Hong: Seoul National University

Nature Communications, 2024, vol. 15, issue 1, 1-13

Abstract: Abstract 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.

Date: 2024
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DOI: 10.1038/s41467-024-51585-2

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