Bicontinuous Block Copolymer Morphologies Produced by Interfacially Active, Thermally Stable Nanoparticles

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Polymeric bicontinuous morphologies were created by thermal annealing mixtures of poly(styrene-b-2-vinylpyridine) (PS-b-P2V1) block copolymers and stabilized Au-core/Pt-shell (Au-Pt) nanoparticles. These Au-Pt nanoparticles have a cross-linked polymeric shell to promote thermal stability and are designed to adsorb strongly to the interface of the PS-b-P2VP block copolymer due to the favorable interaction between P2VP block and the exterior of the cross-linked shell of the nanoparticle. The interfacial activity of these Au-Pt nanoparticles under thermal annealing conditions leads to decrease in domain size of the lamellar diblock copolymer. As nanoparticle volume fraction phi(p) was increased, a transition from a lamellar to a bicontinuous morphology was observed. Significantly, the effect of these shell-cross-linked Au-Pt nanoparticles under thermal annealing conditions was similar to those of traditional polymer grafted Au nanoparticles under solvent annealing conditions reported previously. These results suggest a general strategy for producing bicontinuous block copolymer structures by thermal processing through judicious selection of polymeric ligands, nanoparticle core, and block copolymer.
Publisher
AMER CHEMICAL SOC
Issue Date
2011-12
Language
English
Article Type
Article
Keywords

THIN-FILMS; INTERFERENCE LITHOGRAPHY; GOLD NANOPARTICLES; DIBLOCK COPOLYMERS; GLASS-TRANSITION; MOLECULAR-WEIGHT; ORDERED ARRAYS; PHASE-BEHAVIOR; POLYMER-FILMS; LOCATION

Citation

MACROMOLECULES, v.44, no.23, pp.9366 - 9373

ISSN
0024-9297
URI
http://hdl.handle.net/10203/100527
Appears in Collection
CBE-Journal Papers(저널논문)
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