title: Thin films with ultra-low thermal expansion.
abstract: Ultra-low coefficient of thermal expansion (CTE) is an elusive property, and narrow temperature ranges of operation and poor mechanical properties limit the use of conventional materials with low CTE. We structured a periodic micro-array of bi-metallic cells to demonstrate ultra-low effective CTE with a wide temperature range. These engineered tunable CTE thin film can be applied to minimize thermal fatigue and failure of optics, semiconductors, biomedical sensors, and solar energy applications.
authors.affiliation: Graduate Aerospace Laboratories, California Institute of Technology, 1200 E. California Boulevard, Pasadena, CA, 91125, USA.
authors.forename: Namiko
authors.initials: N
authors.lastname: Yamamoto
authors.forename: Eleftherios
authors.initials: E
authors.lastname: Gdoutos
authors.forename: Risaku
authors.initials: R
authors.lastname: Toda
authors.forename: Victor
authors.initials: V
authors.lastname: White
authors.forename: Harish
authors.initials: H
authors.lastname: Manohara
authors.forename: Chiara
authors.initials: C
authors.lastname: Daraio
mesh_terms: D000535:Aluminum / Q000737:chemistry; D015374:Biosensing Techniques / Q000295:instrumentation; D008670:Metals / Q000737:chemistry*; D012666:Semiconductors; D012993:Solar Energy; D013696:Temperature; D014025:Titanium / Q000737:chemistry
chemical_list: D008670:Metals; D000535:Aluminum; D014025:Titanium
keywords: metals; microstructures; thermal stability; thin films; ultra-low thermal expansion