Skin-mounted electronics could help to monitor muscle activity

Engineers at the University of Illinois at Urbana-Champaign developed a device geometry they call ‘filamentary serpentine’, in which the circuits for the various devices are fabricated as tiny, squiggled wires that can bend, wrinkle and stretch with the mechanical properties of skin. The device patches are initially mounted on a thin sheet of water-soluble plastic, then laminated to the skin with water.

Skin-mounted electronics have many biomedical applications, including electro-encephalography (EEG) and electromyography (EMG) sensors to monitor nerve and muscle activity.

‘If we want to understand brain function in a natural environment, that’s completely incompatible with EEG studies in a laboratory,’ said co-leader of the project Prof Todd Coleman of Illinois. ‘We think this could be an important conceptual advance in wearable electronics, to achieve something that is almost unnoticeable to the wearer.’

The researchers have so far demonstrated their concept with a diverse array of electronic components including sensors, light-emitting diodes, transistors, radio-frequency capacitors, wireless antennas and conductive coils and solar cells for power.