Microwire-based multifunctional microsensors for high-performance humidity and strain sensing.

This article focuses on the development of a high-performance multifunctional microsensor based on poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) microwire arrays fabricated via a low-cost capillary nanoimprinting technique. The resulting microsensor exhibits dual sensitivity to humidity and bending strain, with a humidity sensitivity of up to 8520% across a relative humidity range of 23%–97% and a gauge factor (GF) of up to 267 for bending strains between −0.4% and 0.4%. The sensor demonstrates rapid response and recovery times (0.9/3.5 s for humidity) and stable cyclic performance, making it suitable for integration into intelligent wearable devices for real-time monitoring of environmental and physiological signals. This work addresses challenges in micro/nano multifunctional sensor fabrication by providing a scalable method to produce miniaturized, multifunctional sensors with high precision and potential applications in the Internet of Things (IoT), medical care, and human–computer interaction.