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Origami-inspired thin-film shape memory alloy devices.

Prasanth Velvaluri¹, Arun Soor², Paul Plucinsky³

¹Chair for Inorganic Functional Materials, Faculty of Engineering, Kiel University, Kiel, Germany.

Scientific Reports

|May 27, 2021

Summary

Miniaturized origami medical implants made from shape memory alloys can be crimped for insertion and remain stress-free. This breakthrough enables patient-specific treatments for brain aneurysms and safer medical procedures.

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Area of Science:

Materials Science
Biomedical Engineering
Mechanical Engineering

Background:

Medical implants require crimping for insertion but must remain stress-free.
Existing implants face challenges in accommodating diverse anatomical structures.

Purpose of the Study:

To design and fabricate miniaturized origami structures using thin-film shape memory alloys.
To develop a versatile platform for patient-specific medical treatments, particularly for brain aneurysms.

Main Methods:

Utilized a group theory approach to ensure foldability of origami structures.
Employed a wafer-based monolithic fabrication method including thin-film deposition, lithography, and etching with sacrificial layers.

Main Results:

Demonstrated the successful design and fabrication of self-folding miniaturized origami structures.
Validated a group theory approach for predictable folding behavior.
Showcased a fabrication method suitable for integrated self-folding mechanisms and sensors.

Conclusions:

Origami structures from shape memory alloys offer a novel solution for implantable devices.
The group theory approach and fabrication method enable patient-specific designs for conditions like brain aneurysms.
This technology promises to revolutionize miniaturized implants, leading to safer and more effective medical treatments.