Mesh-Architected Structurally Flexible Pb(Zr_0.52Ti_0.48)O₃ Framework Enables Highly Sensitive and Stretchable...

Area of Science:

• Materials Science
• Nanotechnology
• Electronics Engineering

Background:

• Flexible electronics demand piezoelectric sensors with high sensitivity and stretchability, a challenge for conventional devices.
• Existing piezoelectric sensors often compromise sensitivity for stretchability or vice versa.
• The need for robust, high-performance flexible sensors is driven by applications in wearable technology and robotics.

Purpose of the Study:

• To develop a piezoelectric sensor with simultaneous high sensitivity and exceptional stretchability.
• To overcome the limitations of conventional piezoelectric sensors in flexible electronic applications.
• To explore the potential of a novel hexagonal mesh architecture for piezoelectric sensor design.

Main Methods:

• Fabrication of a continuous, structurally flexible ceramic skeleton inspired by hexagonal mesh architecture.
• Integration of a 3D interconnected skeleton for efficient stress transfer and enhanced pressure sensitivity.
• Utilizing hierarchical microfibers within the hexagonal topology for deformation-driven slippage and stretchability.

Main Results:

• Achieved remarkable stretchability up to 220% strain with excellent mechanical stability (>50 cycles).
• Demonstrated high piezoelectric sensitivity of 39.57 mV kPa⁻¹.
• Maintained stable functionality under 100% tensile strain, outperforming conventional sensors.

Conclusions:

• The developed hexagonal ceramic skeleton piezoelectric sensor successfully integrates high sensitivity and superior stretchability.
• The sensor shows potential for fine surface roughness discrimination and real-time monitoring of human movements.
• This flexible piezoelectric sensor is promising for advanced applications in robotic manipulation and wearable health monitoring.