@inproceedings{a85aee327c60471488f375ad669f5b4f,
title = "Epitaxial phase transformation between cylindrical and double gyroid mesophases",
abstract = "Complex phase transformation between the hexagonal cylinder (Hex) and double gyroid (G) phases in a polystyrene-block-poly(ethylene oxide) (PS-b-PEO) diblock copolymer was investigated using two-dimensional (2D) synchrotron small-angle X-ray scattering (SAXS), and transmission electron microscope (TEM). The PS-b-PEO sample contained a small population of another bicontinuous cubic phase having an Im{\=3}m symmetry. These two bicontinuous cubic phases (G and Im{\=3}m) had the same unit cell dimensions. Under a large-amplitude reciprocating shear, the bicontinuous cubic phases transformed into a {"}single-crystal{"}-like Hex phase. When annealed at 150°C for 40 min, the Hex phase partially transformed into well-oriented twinned structures of the G and Im{\=3}m phases without significant loss of orientation in 2D SAXS measurements. Epitaxial phase transformation relationships between the Hex/G and Hex/ Im{\=3}m phases were identified. The mechanism of the Hex → G transformation was examined by TEM.",
author = "Lei Zhu and Lu Sun and Jianjun Miao and Li Cui and Qing Ge and Quirk, \{Roderic P.\} and Chenchen Xue and Cheng, \{Stephen Z.D.\} and Hsiao, \{Benjamin S.\} and Avila-Orta, \{Carlos A.\} and Igors Sics and Cantino, \{Marie E.\}",
year = "2004",
doi = "10.1557/proc-856-bb2.3",
language = "English",
isbn = "155899808X",
series = "Materials Research Society Symposium Proceedings",
publisher = "Materials Research Society",
pages = "8--13",
booktitle = "Multicomponent Polymer Systems",
note = "2004 MRS Fall Meeting ; Conference date: 29-11-2004 Through 03-12-2004",
}