Enhanced microphase separation of thin films of low molecular weight block copolymer by the addition of an ionic liquid

Soft Matter ◽  
2019 ◽  
Vol 15 (48) ◽  
pp. 9991-9996
Author(s):  
Dongxue Li ◽  
Chun Zhou ◽  
Shisheng Xiong ◽  
Xin-Ping Qu ◽  
Gordon S. W. Craig ◽  
...  
Keyword(s):  
Thin Films ◽  
Molecular Weight ◽  
Ionic Liquid ◽  
Block Copolymer ◽  
Microphase Separation ◽  
Low Molecular Weight

Enhanced microphase separation of a high-χ block copolymer by adding a selective ionic liquid to the block copolymer in solution.

Block Copolymer Thin Films Above and Below the Order-Disorder Transition Temperature

2000 ◽  
Vol 629 ◽  
Author(s):  
Ratchana Limary ◽  
Peter F. Green
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Molecular Weight ◽  
Transition Temperature ◽  
Block Copolymer ◽  
Film Thickness ◽  
Diblock Copolymer ◽  
Diblock Copolymers ◽  
Microphase Separation ◽  
Disorder Transition Temperature

ABSTRACTSymmetric diblock copolymers undergo a disorder to order transition below a microphase separation transition temperature. In this temperature range the structure is characterized by alternating lamellae of thickness L. In thin film geometries, the lamellae are oriented normal to the substrate if there is a preferential interaction between either of the block constituents and the substrate/copolymer or copolymer/vacuum interfaces. Depending on the relation between the film thickness and L, the topography of the film might comprise of holes, islands or spinodal-like structures. We show that in a polystyrene-b-poly(methyl methacrylate) diblock copolymer of molecular weight 20, 000 g/mol, above the microphase separation transition temperature, the topography of the film depends on the thickness. A heirarchy of bicontinuous patterns and holes is observed with increasing film thickness for films thinner than 35 nm.

Apparent Critical Micelle Concentrations in Block Copolymer/Ionic Liquid Solutions: Remarkably Weak Dependence on Solvophobic Block Molecular Weight

2012 ◽  
Vol 45 (11) ◽  
pp. 4818-4829 ◽  
Author(s):  
Michelle M. Mok ◽  
Raghuram Thiagarajan ◽  
Maritza Flores ◽  
David C. Morse ◽  
Timothy P. Lodge
Keyword(s):  
Molecular Weight ◽  
Ionic Liquid ◽  
Block Copolymer ◽  
Weak Dependence ◽  
Critical Micelle Concentrations ◽  
Liquid Solutions

Multiscale Dewetting of Low-Molecular-Weight Block Copolymer Ultrathin Films

2002 ◽  
Vol 23 (3) ◽  
pp. 205-209 ◽  
Author(s):  
Donovan N. Leonard ◽  
Phillip E. Russell ◽  
Steven D. Smith ◽  
Richard J. Spontak
Keyword(s):  
Molecular Weight ◽  
Block Copolymer ◽  
Ultrathin Films ◽  
Low Molecular Weight

Random Lasing in Low Molecular Weight Organic Thin Films

2011 ◽  
Author(s):  
S. Kéna-Cohen ◽  
P. N. Stavrinou ◽  
D. D. C. Bradley ◽  
S. A. Maier
Keyword(s):  
Thin Films ◽  
Molecular Weight ◽  
Organic Thin Films ◽  
Low Molecular Weight ◽  
Random Lasing

scholarly journals Study on the Dynamic Behavior of Ionic Species in a Gel Formed by a Low Molecular Weight Gelator and an Ionic Liquid

2009 ◽  
Vol 66 (7) ◽  
pp. 266-271 ◽  
Author(s):  
Toshihiro TAKEKAWA ◽  
Hidenori SATO ◽  
Kazuhiro KAMIGUCHI ◽  
Kenji HANABUSA
Keyword(s):  
Molecular Weight ◽  
Ionic Liquid ◽  
Dynamic Behavior ◽  
Ionic Species ◽  
Low Molecular Weight ◽  
Low Molecular Weight Gelator

Thickness Dependence of the Crystalline Structure and Hole Mobility in Thin Films of Low Molecular Weight Poly(3-hexylthiophene)

2008 ◽  
Vol 41 (18) ◽  
pp. 6800-6808 ◽  
Author(s):  
Siddharth Joshi ◽  
Souren Grigorian ◽  
Ullrich Pietsch ◽  
Patrick Pingel ◽  
Achmad Zen ◽  
...  
Keyword(s):  
Thin Films ◽  
Molecular Weight ◽  
Crystalline Structure ◽  
Hole Mobility ◽  
Thickness Dependence ◽  
Low Molecular Weight

Regular Network Pattern Evolution Observed in Phase Separation in Low-Molecular-Weight LC and LC Block Copolymer Mixture

2009 ◽  
Vol 42 (15) ◽  
pp. 5442-5445 ◽  
Author(s):  
Osamu Sato ◽  
Yusuke Inagaki ◽  
Sungmin Kang ◽  
Masatoshi Tokita ◽  
Junji Watanabe
Keyword(s):  
Molecular Weight ◽  
Phase Separation ◽  
Block Copolymer ◽  
Low Molecular Weight ◽  
Regular Network ◽  
Network Pattern

scholarly journals Chemical Interactions and Their Role in the Microphase Separation of Block Copolymer Thin Films

2009 ◽  
Vol 10 (9) ◽  
pp. 3671-3712 ◽  
Author(s):  
Richard Farrell ◽  
Thomas Fitzgerald ◽  
Dipu Borah ◽  
Justin Holmes ◽  
Michael Morris
Keyword(s):  
Thin Films ◽  
Block Copolymer ◽  
Microphase Separation ◽  
Chemical Interactions
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