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Buckling in serpentine microstructures and applications in elastomer-supported ultra-stretchable electronics with
Yihui Zhang1, Sheng Xu2, Haoran Fu3
1Department of Civil and Environmental Engineering and Department of Mechanical Engineering, Northwestern University, Evanston, IL 60208, USA ; Center for Mechanics and Materials, Tsinghua University, Beijing 100084, China.
Soft Matter
|October 14, 2014
Summary
Researchers studied buckling physics in stretchable serpentine microstructures to design ultra-stretchable electrodes. Optimized serpentine layouts achieve high areal coverage and significant biaxial stretchability for advanced electronics.
Area of Science:
- Materials Science
- Mechanical Engineering
- Nanotechnology
Background:
- Stretchable electronics rely on robust electrical interconnects.
- Serpentine layouts are common but their buckling physics require deeper understanding for enhanced performance.
Purpose of the Study:
- To systematically study buckling physics in lithographically defined serpentine microstructures.
- To strategically design serpentine layouts for ultra-stretchable electrodes with high performance.
Main Methods:
- Analytical modeling
- Finite Element Method (FEM) computations
- Quantitative experimental validation
Main Results:
- Identified and analyzed symmetric and anti-symmetric buckling modes.
- Determined scaling laws for critical buckling strain and elastic limits.
- Achieved remarkable agreement between experimental and numerical results for postbuckling behavior.
Conclusions:
- Optimized serpentine designs enable ultra-stretchable electrodes.
- Demonstrated electrodes with 81% areal coverage and ~170% biaxial stretchability.
- Provides a pathway for advanced stretchable electronic applications.
Keywords:
Buckling analysesMechanical propertiesModelingSerpentine interconnectStretchable electronics
