Transient Emulsion-Assisted Fabrication of Liquid Metal Microsphere Arrays for Mechanically Adaptive Anisotropic...

Area of Science:

• Materials Science
• Nanotechnology
• Electronics Engineering

Background:

• Liquid metal (LM) microsphere arrays are promising for flexible electronics.
• Controlling the arrangement of LM droplets is difficult due to high surface tension.

Purpose of the Study:

• To develop a scalable method for ordered LM microsphere formation.
• To overcome surface tension limitations in LM droplet assembly.
• To create adaptive conductive frameworks for next-generation electronics.

Main Methods:

• A transient emulsion-assisted self-assembly and fusion strategy was employed.
• Surface tension was utilized as a driving force for LM microsphere formation and positioning.
• LM microspheres were embedded in a thermally responsive polymer matrix to form an anisotropic conductive film (ACF).

Main Results:

• Achieved ordered LM microsphere arrays with dynamic interfacial conduction.
• Fabricated ACF demonstrated ultralow contact resistance (0.303 µΩ/mm²) and 96% reduction compared to conventional ACFs.
• The ACF showed stable performance under cyclic loading and mechanical deformation.

Conclusions:

• The developed strategy offers a scalable pathway for high-performance, compliant interconnects.
• This approach enables robust and mechanically resilient packaging for flexible electronics, such as chip-LED arrays.
• The method transforms surface tension from a challenge into an advantage for LM self-assembly.