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 language | English |
|---|---|
| Article number | 36102 |
| Number of pages | 4 |
| Journal | Physical Review Letters |
| Volume | 100 |
| Issue number | 3 |
| Early online date | 23 Jan 2008 |
| DOIs | |
| Publication status | Published - 25 Jan 2008 |
| Externally published | Yes |
Funding
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.