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Origami Inspired Self-assembly of Patterned and Reconfigurable Particles
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Bidirectional Self-Folding with Atomic Layer Deposition Nanofilms for Microscale Origami.
Baris Bircan1, Marc Z Miskin2,3, Robert J Lang4
1School of Applied and Engineering Physics, Cornell University, 271 Clark Hall, Ithaca, New York 14853, United States.
Nano Letters
|June 12, 2020
Summary
Researchers developed new micro-origami devices using nanoscale films for self-folding. This fabrication method enables mass production of complex micromechanical systems for micro- and nanoscale manipulation.
Area of Science:
- Materials Science
- Mechanical Engineering
- Nanotechnology
Background:
- Origami principles enable scale-invariant design and miniaturization.
- Previous microscale origami fabrication used unidirectionally actuated nanoscale sheets.
- Nanoscale fabrication requires advanced techniques for complex structures.
Purpose of the Study:
- To engineer bidirectional folding in nanoscale sheets for micro-origami.
- To develop a method for fabricating complex micro-origami devices using atomic layer deposition (ALD) bilayers.
- To enable mass fabrication and deployment of micromechanical systems.
Main Methods:
- Utilized 4 nm thick SiN-SiO2 bilayer films fabricated via ALD.
- Engineered strain differentials within bilayers to induce bending and controlled curvature.
- Employed lithographic patterning and rigid panels to localize bending.
- Demonstrated self-folding of patterned microstructures upon release.
Main Results:
- Successfully fabricated complex micro-origami devices from nanoscale sheets.
- Achieved controlled bidirectional folding through engineered strain differentials.
- Demonstrated self-assembly of microstructures into prescribed patterns.
- Combined semiconductor microfabrication with origami design principles.
Conclusions:
- This approach facilitates the mass fabrication and deployment of micro-origami devices.
- The developed method is a significant advancement in creating deployable micromechanical systems.
- These micro-origami devices can interact with and manipulate micro- and nanoscale environments effectively.
