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Updated: May 1, 2026
10:08
Fabrication of Large-area Free-standing Ultrathin Polymer Films
Published on: June 3, 2015
15.1K
Thin films with ultra-low thermal expansion.
Namiko Yamamoto1, Eleftherios Gdoutos, Risaku Toda
1Graduate Aerospace Laboratories, California Institute of Technology, 1200 E. California Boulevard, Pasadena, CA, 91125, USA.
Advanced Materials (Deerfield Beach, Fla.)
|March 29, 2014
Summary
Engineered bi-metallic micro-arrays achieve ultra-low coefficient of thermal expansion (CTE) over wide temperature ranges. This breakthrough offers solutions for thermal fatigue in optics, semiconductors, and solar energy applications.
Area of Science:
- Materials Science
- Nanotechnology
- Mechanical Engineering
Background:
- Achieving ultra-low coefficient of thermal expansion (CTE) is challenging.
- Conventional low-CTE materials often have limited operational temperatures and poor mechanical properties.
Purpose of the Study:
- To engineer a material with an ultra-low effective CTE over a wide temperature range.
- To overcome limitations of conventional low-CTE materials.
Main Methods:
- Structured a periodic micro-array of bi-metallic cells.
- Developed engineered tunable CTE thin films.
Main Results:
- Demonstrated ultra-low effective CTE.
- Achieved a wide operational temperature range.
Conclusions:
- The developed bi-metallic micro-array offers a novel solution for minimizing thermal fatigue.
- Potential applications include optics, semiconductors, biomedical sensors, and solar energy devices.
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