Rational assembly of 3D network materials and electronics through tensile buckling

Area of Science:

• Materials Science
• Biomaterials Engineering
• Bioelectronics

Background:

• Bioinspired network designs are crucial for biointegrated electronics and tissue engineering due to their stretchability and biomimetic properties.
• Fabricating ordered, three-dimensional (3D) architected electronic devices with microstructures remains a significant challenge.

Purpose of the Study:

• To introduce a novel fabrication route for 3D network materials with ordered microstructures.
• To enable the design of materials with tunable, biomimetic stress-strain responses for advanced applications.

Main Methods:

• Utilized tensile buckling of stacked multilayer precursors to create 3D network materials.
• Employed a data-driven topology optimization framework to identify optimal 2D precursor patterns.
• Validated computational findings through experimental fabrication and characterization.

Main Results:

• Successfully fabricated well-architected 3D network materials with regularly distributed microstructures and interlayer separation.
• Achieved anisotropic, tunable J-shaped stress-strain curves that mimic biological tissue responses.
• Demonstrated the potential for reconfigurable volumetric 3D displays.

Conclusions:

• Tensile buckling of multilayer precursors offers a unique and efficient route to ordered 3D network materials.
• The developed materials possess tunable mechanical properties suitable for biointegrated electronics and tissue scaffolds.
• This approach opens new avenues for designing advanced biomimetic materials and devices.