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Zheng, B; Man, XK; Ou-Yang, ZC; Schick, M; Andelman, D4
Orienting Thin Films of Lamellar Block Copolymer: The Combined Effect of Mobile Ions and Electric Field
发表期刊MACROMOLECULES
语种英语
关键词DIBLOCK COPOLYMER MICROPHASE SEPARATION ALIGNMENT MICROSTRUCTURE LITHOGRAPHY ORIENTATION PARALLEL ARRAYS NANOSTRUCTURES TRANSITION
摘要We study thin films of A/B diblock copolymer in a lamellar phase confined between two parallel plates (electrodes) that impose a constant voltage across the film. The weak segregation limit is explored via a Ginzburg-Landau-like free energy expansion. We focus on the relative stability of parallel and perpendicular orientations of the lamellar phase and how they are affected by variation of the following four experimental controllable parameters: addition of free ions, the difference in ionic solubilities between the A and B blocks, their dielectric contrast, and the preferential interaction energy of the plates with the blocks. It is found that, in general, the addition of ions lowers the critical voltage needed to reorient the lamellae from being parallel to the plates to being perpendicular to them. A large reduction in critical voltage is obtained when the ions are preferentially solubilized in the block that is not preferred by the plates. This reduction is even further enhanced when the dielectric constant of this block has the higher value. These predictions are all subject to experimental test.
2018
ISSN0024-9297
卷号51期号:19页码:7881-7892
学科领域Polymer Science
学科门类Polymer Science
DOI10.1021/acs.macromol.8b01506
收录类别SCIE
引用统计
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/22799
专题理论物理所科研产出_SCI论文
作者单位1.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China
2.Beihang Univ, Ctr Soft Matter Phys & Its Applicat, Beijing 100191, Peoples R China
3.Beihang Univ, Sch Phys & Nucl Energy Engn, Beijing 100191, Peoples R China
4.Schick, M.] Univ Washington, Dept Phys, Seattle, WA 98195 USA
5.Tel Aviv Univ, Raymond & Beverly Sackler Sch Phys & Astron, IL-69978 Tel Aviv, Israel
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Zheng, B,Man, XK,Ou-Yang, ZC,et al. Orienting Thin Films of Lamellar Block Copolymer: The Combined Effect of Mobile Ions and Electric Field[J]. MACROMOLECULES,2018,51(19):7881-7892.
APA Zheng, B,Man, XK,Ou-Yang, ZC,Schick, M,&Andelman, D.(2018).Orienting Thin Films of Lamellar Block Copolymer: The Combined Effect of Mobile Ions and Electric Field.MACROMOLECULES,51(19),7881-7892.
MLA Zheng, B,et al."Orienting Thin Films of Lamellar Block Copolymer: The Combined Effect of Mobile Ions and Electric Field".MACROMOLECULES 51.19(2018):7881-7892.
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