Skin electronics require stretchable conductors that satisfy metallike conductivity, high stretchability, ultrathin thickness, and facile patternability, but achieving these characteristics simultaneously is challenging. We present a float assembly method to fabricate a nanomembrane that meets all these requirements. The method enables a compact assembly of nanomaterials at the water–oil interface and their partial embedment in an ultrathin elastomer membrane, which can distribute the applied strain in the elastomer membrane and thus lead to a high elasticity even with the high loading of the nanomaterials. Furthermore, the structure allows cold welding and bilayer stacking, resulting in high conductivity. These properties are preserved even after high-resolution patterning by using photolithography. A multifunctional epidermal sensor array can be fabricated with the patterned nanomembranes.

皮肤电子设备需要可拉伸的导体，满足类似金属的导电性、高拉伸性、超薄厚度和易于图案化，但同时实现这些特性具有挑战性。我们提出了一种浮子组装方法来制造满足所有这些要求的纳米膜。该方法使纳米材料能够在水-油界面进行紧凑组装，并将它们部分嵌入超薄弹性体膜中，这可以将施加的应变分布在弹性体膜中，从而即使在纳米材料的高负载下也能产生高弹性。此外，该结构允许冷焊和双层堆叠，从而具有高导电性。即使在使用光刻进行高分辨率图案化后，这些特性也能保留下来。