Core-Shell Hybrid Nanostructures from Block Copolymers | Encapsulation and One-Dimensional Alignment of Nanomaterials within Cross-Linked Block Copolymer Micelles

Publisher

LAP LAMBERT Academic Publishing

Publication Date

2010

Language

English

ISBN 10

383831784X

ISBN 13

9783838317847

Binding

Taschenbuch

Condition

Neu

Dimensions

Weight

364 grams

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Synopsis

Amphiphilic block copolymers can be spontaneously assembled and crosslinked around inorganic nanomaterials to form permanent core-shell nanostructures without the need for covalent attachment of the polymer to the particle. Single-walled carbon nanotubes (SWNTs) and Au nanoparticles were encapsulated within micelles made from amphiphilic poly(styrene-block-acrylic acid) (PS-b-PAA) or poly(methylmethacrylate-block-acrylic acid) (PMMA-b-PAA) copolymers. The structure and physical properties of these nanomaterials were precisely determined by the characteristics of the self-assembled components. The encapsulated nanomaterials can be spontaneously assembled into 1D chains by a morphological transition of polymer micelles from sphere to worm-like structure. Because the crosslinked micelle shells are topologically linked to nanoparticles rather than chemically bound, the encapsulation approach to core-shell nanostructures might be used to add polymer shells to nanomaterials that lack effective surface chemistries.

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