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

Area of Science:

• Biomedical Engineering
• Wearable Technology
• Neuroscience

Background:

• Emotion regulation is crucial for overall health, but personalized management is hindered by a lack of non-invasive monitoring tools.
• Biomarkers like dopamine and cortisol are linked to emotional states, yet real-time, integrated tracking solutions are scarce.

Purpose of the Study:

• To develop an ultrathin, battery-free, and wirelessly integrated sensing system for continuous monitoring of stress-related biomarkers.
• To enable personalized emotion management through real-time data and human-machine interaction.

Main Methods:

• A printable, monolithically integrated sensing system on a flexible, breathable thermoplastic polyurethane (TPU) membrane (36 µm thick).
• Utilized near-field communication (NFC) for wireless power harvesting and data transmission.
• Achieved simultaneous detection of dopamine and cortisol.

Main Results:

• The system demonstrated high air/moisture permeability (162 mm/s and 1230 g/m²/day).
• Achieved sensitive detection limits for dopamine (0.25 µM) and cortisol (1.65 nM).
• Enabled continuous, wireless stress monitoring with emotion-interactive feedback during daily activities.

Conclusions:

• The proposed printable sensing system offers a novel approach for wearable mental health management.
• Monolithic integration on ultrathin, permeable platforms facilitates non-invasive, personalized stress tracking.
• This technology paves the way for advanced wearable solutions in mental wellness.