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Origami Inspired Self-assembly of Patterned and Reconfigurable Particles

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A universal interface for plug-and-play assembly of stretchable devices.

Ying Jiang¹, Shaobo Ji¹, Jing Sun²

¹Innovative Center for Flexible Devices (iFLEX), Max Planck-NTU Joint Laboratory for Artificial Senses, School of Materials Science and Engineering, Nanyang Technological University, Singapore, Singapore.

|February 15, 2023

Summary

Researchers developed a universal, plug-and-play interface for stretchable hybrid devices. This novel nanostructure connection method enables robust, highly stretchable electronic systems for improved physiological monitoring.

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Area of Science:

Materials Science
Biomedical Engineering
Nanotechnology

Background:

Stretchable hybrid devices integrate soft, rigid, and encapsulation modules for physiological monitoring.
Interconnects in these devices are prone to failure under mechanical stress, limiting device performance.
Current methods for module connection can be complex and may compromise mechanical compliance.

Purpose of the Study:

To develop a universal interface for reliably connecting diverse modules in stretchable hybrid devices.
To create a plug-and-play connection method that enhances device robustness and stretchability.
To demonstrate the interface's utility in assembling functional implantable and on-skin devices.

Main Methods:

Fabrication of an interface using interpenetrating polymer and metal nanostructures.
Characterization of the interface's mechanical and electrical properties, including stretchability and adhesion.
Assembly of stretchable devices using the interface for in vivo and on-skin applications.
Modeling the interface formation using a biphasic network growth model.

Main Results:

Achieved 600% mechanical and 180% electrical stretchability for soft-soft module connections.
Demonstrated strong adhesion for encapsulation of soft modules with an interfacial toughness of 0.24 N/mm.
Successfully assembled devices for in vivo neuromodulation and on-skin electromyography with high signal quality.
Interface allows module connection via simple pressing, without pastes.

Conclusions:

The developed universal interface provides a robust and highly stretchable connection for hybrid electronic devices.
This plug-and-play approach simplifies assembly and accelerates the development of advanced on-skin and implantable monitoring systems.
The interface technology holds significant promise for future wearable and implantable bioelectronic applications.