An Overstretch Strategy to Double the Designed Elastic Stretchability of Stretchable Electronics

Area of Science:

• Materials Science
• Mechanical Engineering
• Electrical Engineering

Background:

• Enhancing elastic stretchability in inorganic stretchable electronics is crucial.
• Current strategies involve prestrained substrates and geometric design.
• A need exists for new methods to improve stretchability beyond current limitations.

Purpose of the Study:

• To introduce and validate a novel 'overstretch strategy' for enhancing the elastic stretchability of inorganic stretchable electronics.
• To demonstrate the effectiveness of this strategy across various geometric configurations and material thicknesses.
• To elucidate the underlying mechanism responsible for the enhanced stretchability.

Main Methods:

• Theoretical analysis to model the overstretch behavior.
• Numerical simulations to predict performance under overstretching.
• Experimental validation using fabricated stretchable electronic devices.
• Investigation of elastoplastic constitutive relation evolution during overstretching.

Main Results:

• The overstretch strategy successfully doubles the designed elastic stretchability of stretchable electronics.
• This strategy is effective for diverse geometrical interconnects (thick and thin cross-sections).
• The mechanism involves an expansion of the elastic range due to altered elastoplastic properties.

Conclusions:

• The overstretch strategy offers a new, effective method to significantly enhance elastic stretchability.
• It is easily implemented and compatible with existing strategies.
• This approach has significant implications for the future design, fabrication, and application of inorganic stretchable electronics.