A shape-reconfigurable electronic composite for stimulus customizable detection via neutral plane shifting.

Area of Science:

• Materials Science
• Electronics
• Mechanics

Background:

• Conventional 3D sensors have fixed designs, limiting sensitivity and measurement range for forces from unintended directions.
• Achieving high sensitivity and broad measurement capabilities in sensors often involves trade-offs in design flexibility.

Purpose of the Study:

• To develop a shape-reconfigurable electronic composite with tunable stiffness for enhanced force sensing.
• To demonstrate the ability to modify sensor sensitivity and measurement range by altering the composite's 3D structure.

Main Methods:

• Utilized a stiffness-tunable polymer combined with crack-based strain sensors.
• Engineered shape reconfigurability by controlling the neutral plane during flexible state modification.
• Validated performance through sequential shape changes (wire, spiral, spring) to target bending, pressing, and stretching forces.

Main Results:

• The stiffness-tunable polymer enabled high degrees of freedom in shape modification, forming various 3D structures.
• Reconfigured shapes maintained structural integrity due to increased polymer stiffness.
• Demonstrated increased sensitivity and measurement range for targeted forces across different configurations.

Conclusions:

• The developed shape-reconfigurable electronic composite offers a facile approach to versatile shape changes in electronic devices.
• This method allows for optimized sensor performance tailored to specific force directions and applications.
• Paves the way for adaptable and user-specific rigid electronics.