Micrometer to Nanometer Patterns of Polypyrrole Thin Films via Microphase Separation and Molecular Mask

Langmuir ◽  
2002 ◽  
Vol 18 (20) ◽  
pp. 7253-7257 ◽  
Author(s):  
Imsun Seo ◽  
Myoungho Pyo ◽  
Gyoujin Cho
Keyword(s):  
Thin Films ◽  
Microphase Separation

Phase Coherence and Microphase Separation Transitions in Diblock Copolymer Thin Films

1999 ◽  
Vol 32 (15) ◽  
pp. 4832-4837 ◽  
Author(s):  
P. Mansky ◽  
O. K. C. Tsui ◽  
T. P. Russell ◽  
Y. Gallot
Keyword(s):  
Thin Films ◽  
Diblock Copolymer ◽  
Microphase Separation ◽  
Phase Coherence

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

Ordered Microphase Separation in Thin Films of PMMA−PBA Synthesized by RAFT: Effect of Block Polydispersity

2009 ◽  
Vol 42 (8) ◽  
pp. 3138-3146 ◽  
Author(s):  
Wilasinee Sriprom ◽  
Michael James ◽  
Sébastien Perrier ◽  
Chiara Neto
Keyword(s):  
Thin Films ◽  
Microphase Separation

Two interpenetrating monoclinic superlattices of a self-assembling rodcoil copolymer thin film

1994 ◽  
Vol 52 ◽  
pp. 442-443
Author(s):  
L. S. Li ◽  
S. I. Stupp
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Physical Properties ◽  
Microphase Separation ◽  
Film Plane ◽  
Molecular Volume ◽  
Cross Linking ◽  
Self Assembling ◽  
Lamellar Morphology ◽  
Flexible Coil

In earlier work, we showed that the rodcoil copolymer (I), containing a rigid board-like mesogenic block connected to a flexible coil-like diblock of approximately 7 isoprene and 7 styrene units, undergoes a microphase separation in thin films cast from solution. The thin films exhibit a lamellar morphology with a mesogenic core sublayer, a polyisoprene (PI) sublayer and a polystyrene (PS) sublayer alternating along the normal to the layers. If the ratio of the molecular volume of the coil-like chain block to that of the mesogenic block could be increased to a certain value a different morphology of thin films would be expected. After cross-linking among the PI blocks, a molecular object with mesogenic core axes oriented perpendicular to the film plane could be formed which would significantly affect physical properties of thin films. In an attempt to obtain a different micTodomain morphology in thin films a similar rod-coil copolymer with approximately 15 isoprene and 15 styrene units in the coil-like chain block (II) was synthesized in our laboratory.

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.

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