聚苯乙烯-嵌段-聚异戊二烯中菱形相（DG）和六方相（HEX）之间的新型外延相变。

New epitaxial phase transition between DG and HEX in PS-b-PI.

作者信息

Park Hae-Woong, Jung Jueun, Chang Taihyun, Matsunaga Kazuyuki, Jinnai Hiroshi

机构信息

Department of Chemistry and Polymer Research Institute, Pohang University of Science and Technology, Pohang, 790-784, Korea.

出版信息

J Am Chem Soc. 2009 Jan 14;131(1):46-7. doi: 10.1021/ja808259m.

DOI:10.1021/ja808259m

PMID:19072158

Abstract

We investigated the epitaxial phase transition from double gyroid (DG) to hexagonally packed cylinder (HEX) phases of a polystyrene-b-polyisoprene diblock copolymer in a thin film on a Si wafer substrate. The internal structure of the thin film was investigated by grazing incidence small-angle X-ray scattering, transmission electron microscopy, and transmission electron microtomography (TEMT). TEMT allows observation of the 3D-image of coexisting DG and HEX directly. Good domain orientation in the thin film and direct 3D-imaging of TEMT made it possible to observe the coexisting phase of DG and HEX, and a new epitaxial transition path from DG to HEX was found.

摘要

我们研究了硅片衬底上聚苯乙烯 -b-聚异戊二烯二嵌段共聚物薄膜中从双连续螺旋柱状相（DG）到六方柱状相（HEX）的外延相变。通过掠入射小角X射线散射、透射电子显微镜和透射电子显微断层成像（TEMT）对薄膜的内部结构进行了研究。TEMT能够直接观察到共存的DG和HEX的三维图像。薄膜中良好的畴取向以及TEMT的直接三维成像使得观察DG和HEX的共存相成为可能，并且发现了一条从DG到HEX的新的外延转变路径。