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Fractal dendrite-based electrically conductive composites for laser-scribed flexible circuits
Cheng Yang1, Xiaoya Cui1, Zhexu Zhang1
1Division of Energy and Environment, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China.
Nature Communications
|September 4, 2015
Summary
Researchers developed large-scale fractal silver micro-dendrites for conductive composites. These dendrites enable ultra-low electrical percolation thresholds, advancing interconnect technology for flexible electronics.
Area of Science:
- Materials Science
- Nanotechnology
- Electrical Engineering
Background:
- Fractal metallic dendrites show promise but face challenges in large-scale synthesis and application understanding.
- Their use in electronic printing and packaging remains underexplored.
Purpose of the Study:
- To demonstrate a controllable, large-scale synthesis of fractal silver (Ag) micro-dendrites.
- To evaluate their performance as fillers in isotropically electrically conductive composites (ECCs).
Main Methods:
- Developed a method for synthesizing fractal Ag micro-dendrites at the hundred-gram scale.
- Incorporated these micro-dendrites into ECCs to assess their electrical properties.
Main Results:
- Achieved an ultra-low electrical percolation threshold of 0.97 vol% (8 wt%) in ECCs due to fractal geometry and low-temperature sintering.
- Demonstrated reduced laser-scribe energy requirements for patterning fine circuit lines.
Conclusions:
- The synthesized fractal Ag micro-dendrites offer a viable solution for advanced interconnect technology.
- Their unique properties hold significant potential for high-performance flexible electronics and microelectronics wiring.
