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A Novel Route for the Preparation of Discrete Nanostructured Carbons from Block Copolymers with Polystyrene Segments

✍ Scribed by Jinyu Huang; Chuanbing Tang; Hyungil Lee; Tomasz Kowalewski; Krzysztof Matyjaszewski

Publisher
John Wiley and Sons
Year
2007
Tongue
English
Weight
346 KB
Volume
208
Category
Article
ISSN
1022-1352

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✦ Synopsis

Abstract

Well‐defined nanostructured carbon was prepared by pyrolysis of core cross‐linked micelles formed from block copolymers containing polystyrene segments. These micelles were obtained by self‐assembly of poly(ethylene oxide)‐block‐polystyrene (PEO~113~‐b‐PS~52~) diblock copolymer or brush macromolecules containing polymethacrylate backbone and side chains with PS and poly(acrylic acid) block segments (PBPEM~330~‐g‐PS~40~‐b‐PAA~111~) in selective solvents. UV irradiation was used to induce cross‐linking of the PS core in the micelles. After pyrolysis, the cross‐linked PS cores were converted to a partially graphitic carbon, while the shells were sacrificed, resulting in the formation of discrete carbon nano‐objects. The formation of carbon material was confirmed by Raman scattering spectroscopy while the morphology of the precursor and the resulting pyrolyzed product was studied by atomic force microscope (AFM).

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