A highly transparent and ultra-stretchable conductor with stable conductivity during large deformation

Area of Science:

• Materials Science
• Polymer Science
• Nanotechnology

Background:

• Intrinsically stretchable conductors are crucial for advanced electronics but often fail under large deformation or extreme temperatures.
• Existing materials struggle with compatibility between conductive domains and elastic networks, limiting their electro-mechanical performance.
• Addressing the vulnerability of stretchable conductors at high/low temperatures and large strains remains a significant challenge.

Purpose of the Study:

• To overcome the limitations of current stretchable conductors by developing a material with enhanced electro-mechanical properties.
• To introduce a novel approach utilizing the synergistic effect between conductive zwitterionic nanochannels and dynamic hydrogen-bonding networks.
• To create a highly transparent, ultra-stretchable, and self-healing conductor with stable conductivity across a wide range of conditions.

Main Methods:

• Development of conductive zwitterionic nanochannels integrated with dynamic hydrogen-bonding networks.
• Characterization of the material's electro-mechanical properties, including transmittance, stretchability, modulus, and conductivity stability.
• Demonstration of transparent integrated systems fabricated via 3D printing of the precursor material.

Main Results:

• Achieved a highly transparent conductor (>90% transmittance) with ultra-stretchability (>10,000% strain) and high modulus (>2 MPa Young's modulus).
• Demonstrated stable electrical conductivity during large deformations and across a wide temperature range.
• Successfully fabricated transparent integrated systems using 3D printing, exhibiting diverse sensory capabilities (strain, temperature, humidity, liquid recognition).

Conclusions:

• The synergistic combination of conductive zwitterionic nanochannels and dynamic hydrogen-bonding networks effectively overcomes the limitations of conventional stretchable conductors.
• The developed material offers exceptional electro-mechanical properties, including transparency, ultra-stretchability, self-healing, and robust conductivity under challenging conditions.
• The 3D-printable transparent integrated systems pave the way for next-generation wearable electronics and advanced multi-modal sensors.