An Ultrathin, Permeable, and Battery-Free Monolithically Integrated System for Emotion Sensing and Interaction.

Yu, Xiong; Peng, Zheng; Shi, Yuqing; Wang, Yuqi; Zhou, Kemeng; Zhang, Xinyi; Xiang, Yueqi; Xiao, Yutian et al. · Adv Mater · 2026

basic_science · Level V

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Abstract

Emotion regulation is critical for mental and physical health. Biomarkers such as dopamine and cortisol in body fluids are relevant to emotional status, while there is a lack of feasible devices to achieve personalized emotion management with minimized interferences. This study presents an ultrathin and battery-free monolithically integrated sensing system for wireless tracking of stress-related biomarkers with human-machine interaction. The system can be printed on a flexible and porous thermoplastic polyurethane (TPU) membrane with a thickness of around 36 µm, exhibiting remarkable air/moisture permeability of 162 mm/s and 1230 g/m<sup>2</sup>/day. It achieves dopamine and cortisol analysis with detection limits down to 0.25 µM and 1.65 nM. An integrated near-field communication module enables wireless power harvesting and data transmission for continuous stress monitoring during daily activities, accompanied by emotion-interactive feedback. The proposed printable method enables monolithic integration of multifunctional devices on ultrathin and permeable platforms toward mental health management in a wearable fashion.