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Conjugated polymer covalently modified multiwalled carbon nanotubes for optical limiting

Authors

  • Lijuan Niu,

    1. Key Laboratory for Advanced Materials, Department of Chemistry, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
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  • Peipei Li,

    1. Key Laboratory for Advanced Materials, Department of Chemistry, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
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  • Yu Chen,

    Corresponding author
    1. Key Laboratory for Advanced Materials, Department of Chemistry, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
    • Key Lab for Advanced Materials, Department of Chemistry, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
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  • Jun Wang,

    Corresponding author
    1. Materials Ireland Polymer Research Center, School of Physics and the Centre for Research on Adaptative Nanostructures and Nanodevices (CRANN), Trinity College Dublin, Dublin 2, Ireland
    • Materials Ireland Polymer Research, School of Physics and the Centre for Research on Adaptative Nanostructures and Nanodevices (CRANN), Trinity College Dublin, Dublin 2, Ireland
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  • Jinjuan Zhang,

    1. Key Laboratory for Advanced Materials, Department of Chemistry, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
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  • Bin Zhang,

    1. Key Laboratory for Advanced Materials, Department of Chemistry, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
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  • Werner J. Blau

    1. Materials Ireland Polymer Research Center, School of Physics and the Centre for Research on Adaptative Nanostructures and Nanodevices (CRANN), Trinity College Dublin, Dublin 2, Ireland
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Abstract

A new soluble multiwalled carbon nanotubes (MWNTs) covalently functionalized with conjugated polymer PCBF, in which the wt % of MWNTs is approximately calculated as 7.3%, and the average thickness of PCBF covalently grafted onto MWNTs is 10.4 nm, was synthesized by an amidation reaction. In contrast to the starting polymer PCBF-NH2, grafting of PCBF onto MWNTs led to a 0.3 eV red-shift of the N1s XPS peak at 399.7 eV assigning to N in the unreacted NH2moieties in the resulting copolymer structure and an appearance of new peak at 402 eV corresponding to N bound to the carbonyl C (i.e., NH[BOND]C[DOUBLE BOND]O). Unlike PCBF-NH2, which only displayed a weak optical limiting response at 532 nm, Z-scan for MWNT-PCBF exhibited a much broader reduction in transmission and a scattering accompanying on the focus of the lens at both 532 and 1064 nm, indicating a prominent broadband optical limiting response. The thermally induced nonlinear scattering is responsible for the optical limiting. © 2010 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2010

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