2015年10月1日
Self-organization of highly ordered honeycomb buckling patterns in crystalline thin films
Japanese Journal of Applied Physics
- ,
- ,
- 巻
- 54
- 号
- 10
- 記述言語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.7567/JJAP.54.105502
© 2015 The Japan Society of Applied Physics. Highly ordered honeycomb buckling patterns were self-organized by a simple annealing process. The patterns were formed by thin, layered crystalline films of Al4C3 and carbon synthesized on a sapphire c-plane substrate by chemical vapor deposition. While annealing at 1000 °C, the thin bilayer film wrinkled and began to develop a two-dimensionally periodic pattern. Two patterns, with periodicities of 34 and 20 ?m, were observed by two-dimensional fast Fourier transform (2D-FFT) analysis. Both patterns showed clear and sharp peaks at six orientations, corresponding to the vertices of a regular hexagon, similarly to the crystallinity of sapphire. Additionally, a shift of the Raman peak to a lower frequency was observed after annealing. These results reveal that the self-organization of a periodic buckling pattern is possible without complicated conventional lithography through the use of crystalline materials. Thus, the highly periodic hexagonal patterns obtained with thin crystal materials have a high symmetry, as characterized from 2D-FFT, and can be applied as an optical grating.
- リンク情報
- ID情報
-
- DOI : 10.7567/JJAP.54.105502
- ISSN : 0021-4922
- eISSN : 1347-4065
- SCOPUS ID : 84943327917