Human Activity Recording Based on Skin-Strain-Actuated Microfluidic Pumping in Asymmetrically Designed Micro-Channels

Editorial summary

An asymmetrical microfluidic device was designed to record repeated skin strain through passive fluid movement. Theoretical predictions and benchtop tests were compared, followed by wearable demonstrations. The device stores a record of movement in the position of a liquid interface without requiring on-skin electronic components.