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Advanced Materials

Multiwalled Carbon Nanotubes Beaded with ZnO Nanoparticles for Ultrafast Nonlinear Optical Switching

Authors

  • Y. Zhu,

    1. Department of Physics, National University of Singapore (NUS), 2 Science Drive 3, 117542, Singapore
    2. National University of Singapore (NUS), Nanoscience and Nanotechnology Initiative, S13, 2 Science Drive 3, 117542, Singapore
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  • H. I. Elim,

    1. Department of Chemistry and Biomolecular Engineering, National University of Singapore (NUS), 4 Engineering Drive 4, 117576, Singapore
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  • Y.-L. Foo,

    1. Institute of Materials Research and Engineering, 3 Research Link, 117602, Singapore
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  • T. Yu,

    1. Department of Physics, National University of Singapore (NUS), 2 Science Drive 3, 117542, Singapore
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  • Y. Liu,

    1. Department of Physics, National University of Singapore (NUS), 2 Science Drive 3, 117542, Singapore
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  • W. Ji,

    1. Department of Physics, National University of Singapore (NUS), 2 Science Drive 3, 117542, Singapore
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  • J.-Y. Lee,

    1. Department of Chemistry and Biomolecular Engineering, National University of Singapore (NUS), 4 Engineering Drive 4, 117576, Singapore
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  • Z. Shen,

    1. School of Physical and Mathematical Sciences, Nanyang Technological University, 1 Nanyang Walk, 637616, Singapore
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  • A. T. S. Wee,

    1. Department of Physics, National University of Singapore (NUS), 2 Science Drive 3, 117542, Singapore
    2. National University of Singapore (NUS), Nanoscience and Nanotechnology Initiative, S13, 2 Science Drive 3, 117542, Singapore
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  • J. T. L. Thong,

    1. National University of Singapore (NUS), Nanoscience and Nanotechnology Initiative, S13, 2 Science Drive 3, 117542, Singapore
    2. Department of Electrical and Computer Engineering, National University of Singapore (NUS), 4 Engineering Drive 3, 117576, Singapore
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  • C. H. Sow

    1. Department of Physics, National University of Singapore (NUS), 2 Science Drive 3, 117542, Singapore
    2. National University of Singapore (NUS), Nanoscience and Nanotechnology Initiative, S13, 2 Science Drive 3, 117542, Singapore
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  • The authors acknowledge support from the NUS Academic Research Fund. Y. Zhu thanks K. C. Chin for his help on sputtering, and J. L. Kwek, W. Y. Kan, and X. Y. Leong for their help on the morphology characterization. T. Yu acknowledges the support of the Singapore Millennium Foundation.

Abstract

A hybrid system of ZnO nanoparticles on multiwalled carbon nanotubes (MWNTs) is fabricated by simply heating Zn-coated MWNTs on a hot plate in air. Ultrafast optical switching and three-photon adsorption are observed from this hybrid system, and the absorption coefficient can be readily adjusted by changing the Zn-coating thickness. These results provide opportunities for cost-effectively integrating carbon nanotubes with functional oxide nanoparticles in future nanodevices.

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