Directed self assembly of block copolymers using chemical patterns with sidewall guiding lines, backfilled with random copolymer brushes

Soft Matter ◽  
2015 ◽  
Vol 11 (47) ◽  
pp. 9107-9114 ◽  
Author(s):  
Gunja Pandav ◽  
William J. Durand ◽  
Christopher J. Ellison ◽  
C. Grant Willson ◽  
Venkat Ganesan
Keyword(s):  
Block Copolymer ◽  
Block Copolymers ◽  
Film Thickness ◽  
Self Assembly ◽  
Interaction Strength ◽  
Random Copolymer ◽  
Copolymer Film ◽  
Pattern Size ◽  
Copolymer Brushes

Directed self-assembly of block copolymers on chemical patterns with sidewall guiding lines is examined as a function of backfill brush properties, block copolymer film thickness, pattern size, and sidewall interaction strength.

Synthesis of bottlebrush block copolymers from bottlebrush polystyrene and bottlebrush random copolymer of ω ‐end‐norbornyl polymethacrylates and their self‐assembly

2020 ◽  
Vol 58 (16) ◽  
pp. 2159-2167 ◽  
Author(s):  
Ho‐Bin Seo ◽  
Myung‐Jin Kim ◽  
Yong‐Guen Yu ◽  
Chang‐Geun Chae ◽  
Jae‐Suk Lee
Keyword(s):  
Block Copolymers ◽  
Self Assembly ◽  
Random Copolymer

Solvent Effects on the Synthesis of Polymeric Nanoparticles via Block Copolymer Self-Assembly Using Microporous Membranes

2020 ◽  
Vol 1000 ◽  
pp. 324-330
Author(s):  
Sri Agustina ◽  
Masayoshi Tokuda ◽  
Hideto Minami ◽  
Cyrille Boyer ◽  
Per B. Zetterlund
Keyword(s):  
Block Copolymer ◽  
Block Copolymers ◽  
Self Assembly ◽  
Polymeric Nanoparticles ◽  
Raft Polymerization ◽  
Membrane Emulsification ◽  
Membrane Pore ◽  
Novel Technique ◽  
Wide Range ◽  
Membrane Pore Size

The self-assembly of block copolymers has attracted attention for many decades because it can yield polymeric nanoobjects with a wide range of morphologies. Membrane emulsification is a fairly novel technique for preparation of various types of emulsions, which relies on the dispersed phase passing through a membrane in order to effect droplet formation. In this study, we have prepared polymeric nanoparticles of different morphologies using self-assembly of asymmetric block copolymers in connection with membrane emulsification. Shirasu Porous Glass (SPG) membranes has been employed as the membrane emulsification equipment, and poly (oligoethylene glycol acrylate)-block-poly (styrene) (POEGA-b-PSt) copolymers prepared via RAFT polymerization. It has been found that a number of different morphologies can be achieved using this novel technique, including spheres, rods, and vesicles. Interestingly, the results have shown that the morphology can be controlled not only by adjusting experimental parameters specific to the membrane emulsification step such as membrane pore size and pressure, but also by changing the nature of organic solvent. As such, this method provides a novel route to these interesting nanoobjects, with interesting prospects in terms of exercising morphology control without altering the nature of the block copolymer itself.

scholarly journals Understanding Film Thickness‐Dependent Block Copolymer Self‐Assembly by Controlled Polymer Dewetting on Prepatterned Surfaces

2019 ◽  
Vol 7 (1) ◽  
pp. 1901605 ◽  
Author(s):  
Katharina Brassat ◽  
Daniel Kool ◽  
Colin G. A. Nallet ◽  
Jörg K. N. Lindner
Keyword(s):  
Block Copolymer ◽  
Film Thickness ◽  
Self Assembly

Self-assembly and disassembly of a redox-responsive ferrocene-containing amphiphilic block copolymer for controlled release

2015 ◽  
Vol 6 (10) ◽  
pp. 1817-1829 ◽  
Author(s):  
Lichao Liu ◽  
Leilei Rui ◽  
Yun Gao ◽  
Weian Zhang
Keyword(s):  
Controlled Release ◽  
Block Copolymer ◽  
Block Copolymers ◽  
Rhodamine B ◽  
Self Assembly ◽  
Amphiphilic Block Copolymer ◽  
Model Molecule ◽  
Redox Responsive

The synthesis and self-assembly of ferrocene-containing block copolymers PEG-b-PMAEFc, and the encapsulation and redox-responsive release of a model molecule (rhodamine B) upon external redox stimuli (H2O2).

Rapid-flux-solvent-atmosphere method for tailoring the morphology of titania substrates over a large area via direct self-assembly of block copolymers

RSC Advances ◽  
2014 ◽  
Vol 4 (32) ◽  
pp. 16721-16725 ◽  
Author(s):  
Gianpaolo Chieffi ◽  
Rocco Di Girolamo ◽  
Antonio Aronne ◽  
Pasquale Pernice ◽  
Esther Fanelli ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Block Copolymers ◽  
Self Assembly ◽  
Hybrid Composite ◽  
Fast Method ◽  
Large Area ◽  
Composite Nanostructures

A fast method for the preparation of block-copolymer-based hybrid composite nanostructures and titania substrates well oriented over a large area, is illustrated.

Development of Strategies to Improvement Ordering and Perpendicular Alignment of Cylinder Phase Block Copolymers Used as Templates for Bit Patterned Media

2007 ◽  
Vol 1032 ◽  
Author(s):  
Seth Garrett ◽  
Vincent Franco ◽  
Timothy Snowden ◽  
Chris Redden ◽  
Vishal Warke ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Block Copolymers ◽  
Substrate Surface ◽  
Chemical Properties ◽  
Random Copolymer ◽  
Pattern Generation ◽  
Information Storage ◽  
Bit Patterned Media ◽  
Patterned Media ◽  
The Individual

AbstractBit patterned media, including media fabricated with a gradient in composition, is being developed as a potential path to higher information storage density. The noise level in such media is significantly impacted by the precision of the ordering of the individual bits and by the narrowness of their size distribution. Block copolymers that phase separate on the appropriate length scale are one method of pattern generation that is receiving considerable attention. For cylinder forming block copolymer phases the ordering and degree of perpendicular alignment is largely determined by the matching of the substrate surface to the block copolymer. If the chemical properties of the substrate surface match the average for the block copolymer, then thin films of the block copolymer align perpendicularly on annealing. Although there are a number of examples where the substrate surface fortuitously matches the block copolymer, in general an orienting layer is necessary to provide the appropriate match. The most popular approach has been to synthesize a random copolymer with the same average composition as the block copolymer. In order to produce suitably thin orienting layers it has been necessary to chemically tether the random copolymer to the substrate. Previously used chemistry has not been suitable for noble metal substrates such as platinum. We have been developing an alternate approach using thiol functional groups which we anticipate will be more suitable for Pt capped substrates.

scholarly journals A facile strategy for manipulating micellar size and morphology through intramolecular cross-linking of amphiphilic block copolymers

2017 ◽  
Vol 8 (23) ◽  
pp. 3647-3656 ◽  
Author(s):  
Ryoto Tanaka ◽  
Kodai Watanabe ◽  
Takuya Yamamoto ◽  
Kenji Tajima ◽  
Takuya Isono ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Block Copolymers ◽  
Self Assembly ◽  
Amphiphilic Block Copolymers ◽  
Amphiphilic Block Copolymer ◽  
Cross Linking ◽  
Micellar Size ◽  
System P ◽  
Assembly Behavior ◽  
Size And Morphology

The effect of intramolecular cross-linking on aqueous self-assembly behavior was systematically investigated based on an amphiphilic block copolymer system.

Polymeric Janus nanoparticles templated by block copolymer thin films

RSC Advances ◽  
2015 ◽  
Vol 5 (55) ◽  
pp. 44218-44221 ◽  
Author(s):  
Elio Poggi ◽  
Jean-Pierre Bourgeois ◽  
Bruno Ernould ◽  
Jean-François Gohy
Keyword(s):  
Thin Films ◽  
Surface Modification ◽  
Block Copolymer ◽  
Block Copolymers ◽  
Self Assembly ◽  
The Self ◽  
Polymer Grafting ◽  
Novel Approach ◽  
Janus Nanoparticles

We report a novel approach to synthesize well-defined polymeric Janus nanoparticles by combining the self-assembly of block copolymers in thin films and surface modification by polymer grafting.

Block Copolymers: Thermodynamics, Dynamics, and Small-Angle Scattering

2015 ◽  
Author(s):  
Lee M. Trask ◽  
Nacu Hernandez ◽  
Eric W. Cochran
Keyword(s):  
Block Copolymer ◽  
Block Copolymers ◽  
Small Angle ◽  
Self Assembly ◽  
Microphase Separation ◽  
Small Angle Scattering ◽  
Angle Scattering ◽  
Copolymer Melts ◽  
Shear Processing ◽  
Kinetics Of

This article explores the dynamics, thermodynamics, and small-angle scattering of block copolymers. The goal is to determine what drives the applications of block copolymers, i.e. how block copolymers behave and how they are characterized. The article begins with a summary of the experimental data and various theories that comprise our understanding of block copolymer thermodynamics, with particular emphasis on phase behavior and especially the theory of microphase separation. It then considers topics related to block copolymer dynamics, including diffusion, viscoelasticity and rheology, shear-processing, and the kinetics of self-assembly. It also discusses small-angle scattering techniques as applied to block copolymer characterization, including scattering from ordered block copolymer melts.

scholarly journals Impact of backbone composition on homopolymer dynamics and brush block copolymer self-assembly

2020 ◽  
Vol 11 (45) ◽  
pp. 7147-7158
Author(s):  
Bret M. Boyle ◽  
Joseph L. Collins ◽  
Tara E. Mensch ◽  
Matthew D. Ryan ◽  
Brian S. Newell ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Block Copolymers ◽  
Photonic Crystals ◽  
Self Assembly ◽  
Side Chain ◽  
Backbone Structure

Four series of brush block copolymers with near identical side chain compositions but varying backbone structures were synthesized to investigate the effect of backbone structure on the thermal self-assembly to photonic crystals.

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