Liquid Metal-Enabled Soft Bioelectronics for Human Health Monitoring

Area of Science:

• Materials Science and Engineering
• Biomedical Engineering
• Wearable Technology

Background:

• Continuous physiological monitoring is vital for proactive healthcare and chronic disease management.
• Traditional rigid sensors have limitations in mechanical compatibility, signal fidelity, and wearability during dynamic activities.
• Liquid metal (LM) based flexible sensors present a promising alternative due to their unique properties.

Purpose of the Study:

• To review recent advancements in LM-based flexible sensors for human health monitoring.
• To analyze engineering strategies for LM materials and their applications.
• To discuss the potential of LM sensors in shifting healthcare towards predictive and personalized medicine.

Main Methods:

• Systematic analysis of LM material engineering strategies: formulation, substrate selection, circuit patterning, printing, and encapsulation.
• Review of LM sensor applications in monitoring multi-joint motion, pulse, heart-rate, wound infection, body temperature, sweat, and respiration.
• Discussion of artificial intelligence's role in data processing and signal interpretation for flexible sensing.

Main Results:

• LM-based flexible sensors achieve conformal contact with body surfaces for high-fidelity monitoring of multiple physiological parameters.
• These sensors overcome the limitations of traditional rigid sensors in dynamic activities and long-term wearability.
• LM sensors facilitate a shift towards predictive healthcare and personalized medicine through advanced health monitoring.

Conclusions:

• LM-based flexible sensors represent a significant innovation in human health monitoring, offering high-fidelity signal capture without user discomfort.
• Future material and structural innovations in LM sensors will overcome current monitoring barriers.
• These sensors enable scenario-integrated applications, paving the way for improved healthcare outcomes.