DOE OSTI · 1472177
Highly oriented and ordered microstructures in block copolymer films
Abstract
ABSTRACT Block copolymer (BCP) films with long‐range lateral ordering and orientation are crucial for many applications. Here, we report a simple, versatile strategy based on a solution casting procedure, to produce millimeter thick film of BCPs with highly oriented nanostructures. Transmission electron microscope (TEM), small angle X‐ray scattering (SAXS), and Hansen solubility parameters were used to study the morphology and interactions of the system. A variety of BCP‐solvent pairs were investigated. Factors including set‐up geometry, BCP characteristics, solvent evaporation, surface tension, and interactions, such as solvent‐BCP, solvent‐substrate, and BCP‐substrate were examined. A mechanism is proposed to describe the observed long‐range lateral ordering and orientation in films up to 1 mm in thickness. © 2018 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2018 , 56 , 1369–1375
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Zhao, Wei, Zhang, Yi, Wang, Xiao, Hu, Xiaowen, Liu, Feng, Russell, Thomas P., Zhou, Guofu. 2018-09-21. Highly oriented and ordered microstructures in block copolymer films. https://doi.org/10.1002/polb.24720
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