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Skin-like electronics that can adhere seamlessly to human skin or within the body are highly desirable for applications such as health monitoring^,, medical treatment^,, medical implants and biological studies^,, and for technologies that include human–machine interfaces, soft robotics and augmented reality^,. Rendering such electronics soft and stretchable—like human skin—would make them more comfortable to wear, and, through increased contact area, would greatly enhance the fidelity of signals acquired from the skin. Structural engineering of rigid inorganic and organic devices has enabled circuit-level stretchability, but this requires sophisticated fabrication techniques and usually suffers from reduced densities of devices within an array^,,,. We reasoned that the desired parameters, such as higher mechanical deformability and robustness, improved skin compatibility and higher device density, could be provided …