Thin films of block copolymer supramolecular assemblies: Microphase separation and nanofabrication

2010 ◽  
Vol 247 (10) ◽  
pp. 2458-2469 ◽  
Author(s):  
Marcus Böhme ◽  
Biplab Kuila ◽  
Heike Schlörb ◽  
Bhanu Nandan ◽  
Manfred Stamm
Keyword(s):  
Thin Films ◽  
Block Copolymer ◽  
Microphase Separation ◽  
Supramolecular Assemblies

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

Microphase Separation of Block Copolymer Thin Films

2010 ◽  
Vol 31 (7) ◽  
pp. 591-608 ◽  
Author(s):  
Jilin Zhang ◽  
Xinhong Yu ◽  
Ping Yang ◽  
Juan Peng ◽  
Chunxia Luo ◽  
...  
Keyword(s):  
Thin Films ◽  
Block Copolymer ◽  
Microphase Separation

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.

Tem Studies of Single and Double Microdomain Layers of Block Copolymer

1998 ◽  
Vol 4 (S2) ◽  
pp. 818-819
Author(s):  
N. Yao ◽  
M. Park ◽  
C. Harrison ◽  
D. H. Adamson ◽  
P. M. Chaikin ◽  
...  
Keyword(s):  
Thin Films ◽  
Glass Transition ◽  
Block Copolymer ◽  
Diblock Copolymers ◽  
Microphase Separation ◽  
Covalent Bond ◽  
Inorganic Materials ◽  
Polymer Chains ◽  
Copolymer Films ◽  
Cylinders And Spheres

Diblock copolymers consist of two chemically different polymer chains (or blocks) joined by a covalent bond. Because of the incompatibility between the two blocks and connectivity constraints, diblock copolymers spontaneously self-assemble into microphase-separated nanometer size domains that exhibit ordered morphologies at equilibrium. Commonly observed microdomain morphologies in bulk samples are periodic arrangements of lamellae, cylinders, and spheres. Recent studies show that the thin films of such block copolymers are of great potential for many nanoapplications including nanolithography and template synthesis for inorganic materials. Here, we report TEM studies of osmylated and ozonated thin diblock copolymer films.An asymmetric block copolymer was synthesized with a composition of 36 kg/mol for the poly(styrene)(PS) block and 11 kg/mole for the poly (butadiene)(PB) block such that the microphase separation produces PB cylinders in a matrix of PS. The films were spin-coated from solution onto thin silicon nitride windows and annealed above the glass transition temperature in vacuum.

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.

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