Three-dimensional visualization of phase transition in polystyrene-block-polydimethylsiloxane thin film

被引：9

作者：

Wen, Tao ^{[1
,2
]}

Wang, Hsiao-Fang ^{[2
]}

Georgopanos, Prokopios ^{[3
,4
]}

Avgeropoulo, Apostolos ^{[3
]}

Ho, Rong-Ming ^{[2
]}

机构：

[1] South China Univ Technol, South China Adv Inst Soft Matter Sci & Technol, Guangzhou 510640, Guangdong, Peoples R China

[2] Natl Tsing Hun Univ, Dept Chem Engn, Hsinchu 30013, Taiwan

[3] Univ Ioannina, Dept Mat Sci & Engn, Univ Campus Ioannina, Ioannina 45110, Greece

[4] Helmholtz Zentrum Geesthacht, Inst Polymer Res, Max Planck Str 1, D-21502 Geesthacht, Germany

来源：

POLYMER | 2019年 / 167卷

基金：

中国国家自然科学基金;

关键词：

Block copolymer; Self-assembly; Phase transition; 3D TEM; Order-order transition; ORDER-ORDER TRANSITIONS; DIBLOCK COPOLYMERS; MORPHOLOGY TRANSITION; KINETIC PATHWAYS; CYLINDER; BEHAVIOR; MICRODOMAIN; DISORDER; MECHANISMS; DYNAMICS;

D O I：

10.1016/j.polymer.2019.01.047

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Herein, we aim to examine the order-order transition (OOT) of self-assembled block copolymer (BCP) under spatial confinement using double gyroid (DG) structured polystyrene-block-polydimethylsiloxane (PS-PDMS) thin film as an exemplary system for three-dimensional (3D) visualization of phase transitions. An interesting OOT from DG to hexagonally perforated lamellae (HPL) can be found after thermal annealing, and the morphological evolution and corresponding mechanism for the OOT was systematically investigated by 3D transmission electron microscopy (3D TEM). Our results revealed that the phase transition of DG nanostructure in thin film was different from that in bulk, which is attributed into the surficial/interfacial effects and the effect of confinement on BCP self-assembly. This work provides a feasible method to prepare DG-nanostructured thin film and presents a model system for the examination of morphological evolution from metastable to phase with higher thermodynamic stability in the thin-film state through the OOT.

引用

页码：209 / 214

页数：6

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