Highly conductive and elastic nanomembrane for skin electronics

Area of Science:

• Materials Science
• Nanotechnology
• Biomedical Engineering

Background:

• Skin electronics demand stretchable conductors with high conductivity, elasticity, and thinness.
• Simultaneously achieving these properties in electronic nanomaterials remains a significant challenge.

Purpose of the Study:

• To present a novel float assembly method for fabricating high-performance stretchable nanomembranes.
• To demonstrate the potential of these nanomembranes for creating advanced epidermal sensor arrays.

Main Methods:

• A float assembly technique was employed to create nanomembranes by assembling nanomaterials at a water-oil interface.
• Nanomaterials were partially embedded in an ultrathin elastomer membrane to enhance strain distribution and elasticity.
• The method facilitated cold welding and bilayer stacking for improved conductivity.
• Photolithography was used for high-resolution patterning of the nanomembranes.

Main Results:

• The fabricated nanomembranes exhibited metallike conductivity, high stretchability, and ultrathin thickness.
• The unique structure allowed for strain distribution, maintaining properties even with high nanomaterial loading.
• High conductivity was achieved through cold welding and bilayer stacking.
• Patterned nanomembranes retained their properties after high-resolution photolithography.

Conclusions:

• The float assembly method offers a viable route to produce stretchable conductors meeting the stringent requirements for skin electronics.
• The developed nanomembranes are suitable for fabricating multifunctional epidermal sensor arrays.
• This work advances the development of wearable electronic devices and biosensors.