Cylindrical Block Copolymer Micelles and Co-Micelles of Controlled Length and Architecture

Block copolymers consist of two or more chemically different polymers connected by covalent linkages. In solution, repulsion between the blocks leads to a variety of morphologies, which are thermodynamically driven. Polyferrocenyldimethylsilane block copolymers show an unusual propensity to forming...

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Bibliographic Details
Published in:Science (American Association for the Advancement of Science) 2007-08, Vol.317 (5838), p.644-647
Main Authors: Wang, Xiaosong, Guerin, Gerald, Wang, Hai, Wang, Yishan, Manners, Ian, Winnik, Mitchell A
Format: Article
Language:English
Subjects:
Applied sciences
Architecture
Block copolymers
Chemical chain reactions
Chemical composition
Chemistry
Copolymers
Cylinders
Exact sciences and technology
Hexanes
Inorganic and organomineral polymers
Micelles
Morphology
Nanomaterials
Nanostructure
Physicochemistry of polymers
Polymerization
Polymers
Properties and characterization
Resists
Solvents
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Summary:Block copolymers consist of two or more chemically different polymers connected by covalent linkages. In solution, repulsion between the blocks leads to a variety of morphologies, which are thermodynamically driven. Polyferrocenyldimethylsilane block copolymers show an unusual propensity to forming cylindrical micelles in solution. We found that the micelle structure grows epitaxially through the addition of more polymer, producing micelles with a narrow size dispersity, in a process analogous to the growth of living polymer. By adding a different block copolymer, we could form co-micelles. We were also able to selectively functionalize different parts of the micelle. Potential applications for these materials include their use in lithographic etch resists, in redox-active templates, and as catalytically active metal nanoparticle precursors.
ISSN:0036-8075
1095-9203
DOI:10.1126/science.1141382