Self-assembled triangular and labyrinth buckling patterns of thin films on spherical substrates

Guoxin CAO, Xi CHEN*, Chaorong LI, Ailing JI, Zexian CAO

*Corresponding author for this work

Research output: Journal PublicationsJournal Article (refereed)peer-review

101 Citations (Scopus)

Abstract

We investigated the possibility of controlling thin film buckling patterns by varying the substrate curvature and the stress induced therein upon cooling. The numerical and experimental studies are based on a spherical Ag core/SiO2 shell system. For Ag substrates with a relatively larger curvature, the dentlike triangular buckling pattern comes out when the film nominal stress exceeds a critical value. With increasing film stress and/or substrate radius, the labyrinthlike buckling pattern takes over. Both the buckling wavelength and the critical stress increase with the substrate radius. © 2008 The American Physical Society.
Original languageEnglish
Article number36102
Number of pages4
JournalPhysical Review Letters
Volume100
Issue number3
Early online date23 Jan 2008
DOIs
Publication statusPublished - 25 Jan 2008
Externally publishedYes

Bibliographical note

The numerical study of this research was supported by NSF No. CMMI-0643726, while the experimental work was financed by the NSFC, the Science Foundation of ZSTU, and the Civil Space Exploration Program of China.

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