Laser-Patternable and Stretchable Metal Electrodes Using Metal-Amine Coordination Complexes

Area of Science:

• Materials Science
• Nanotechnology
• Polymer Chemistry

Background:

• Coordination bonding enhances material properties like toughness and stretchability.
• Mussels utilize this interaction for survival in marine environments.
• Stretchable electronics based on coordination bonding are underdeveloped.

Purpose of the Study:

• Introduce a novel stretchable electrode using metal-amine coordination complexes.
• Investigate the stretchability, durability, and fabrication versatility of this new electrode.
• Demonstrate the potential of this material in soft actuators.

Main Methods:

• Formation of metal-amine coordination complexes between a solid metal (Au) and an organic layer.
• Fabrication of thin-film electrodes (tens of nanometers thick).
• Direct laser patterning for pattern formation and stretchability adjustment.

Main Results:

• Achieved excellent stretchability up to 70%.
• Demonstrated high durability with 10,000 cycles at 40% strain without pre-treatment.
• Successfully fabricated a reversible soft actuator using the developed electrode.

Conclusions:

• Metal-amine coordination-complex-based electrodes (MACE) offer a promising route to highly stretchable and durable electronics.
• Direct laser patterning provides versatile fabrication capabilities.
• This approach enables simultaneous softness and toughness in advanced electronic materials.