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Edge and confinement effects allow in situ measurement of size and thickness of liquid-exfoliated nanosheets

Author

Listed:
  • Claudia Backes

    (Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Trinity College Dublin
    School of Physics, Trinity College Dublin)

  • Ronan J. Smith

    (Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Trinity College Dublin
    School of Physics, Trinity College Dublin)

  • Niall McEvoy

    (Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Trinity College Dublin
    School of Chemistry, Trinity College Dublin)

  • Nina C. Berner

    (Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Trinity College Dublin
    School of Chemistry, Trinity College Dublin)

  • David McCloskey

    (Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Trinity College Dublin
    School of Physics, Trinity College Dublin)

  • Hannah C. Nerl

    (Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Trinity College Dublin
    School of Physics, Trinity College Dublin
    School of Chemistry, Trinity College Dublin)

  • Arlene O’Neill

    (Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Trinity College Dublin
    School of Physics, Trinity College Dublin)

  • Paul J. King

    (Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Trinity College Dublin
    School of Physics, Trinity College Dublin)

  • Tom Higgins

    (Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Trinity College Dublin
    School of Physics, Trinity College Dublin)

  • Damien Hanlon

    (Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Trinity College Dublin
    School of Physics, Trinity College Dublin)

  • Nils Scheuschner

    (Institut für Festkörperphysik, Technische Universität Berlin)

  • Janina Maultzsch

    (Institut für Festkörperphysik, Technische Universität Berlin)

  • Lothar Houben

    (Ernst Ruska Center for Microscopy and Spectroscopy with Electrons, Research Center Jülich)

  • Georg S. Duesberg

    (Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Trinity College Dublin
    School of Chemistry, Trinity College Dublin)

  • John F. Donegan

    (Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Trinity College Dublin
    School of Physics, Trinity College Dublin)

  • Valeria Nicolosi

    (Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Trinity College Dublin
    School of Physics, Trinity College Dublin
    School of Chemistry, Trinity College Dublin)

  • Jonathan N. Coleman

    (Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Trinity College Dublin
    School of Physics, Trinity College Dublin)

Abstract

Two-dimensional nanomaterials such as MoS2 are of great interest both because of their novel physical properties and their applications potential. Liquid exfoliation, an important production method, is limited by our inability to quickly and easily measure nanosheet size, thickness or concentration. Here we demonstrate a method to simultaneously determine mean values of these properties from an optical extinction spectrum measured on a liquid dispersion of MoS2 nanosheets. The concentration measurement is based on the size-independence of the low-wavelength extinction coefficient, while the size and thickness measurements rely on the effect of edges and quantum confinement on the optical spectra. The resultant controllability of concentration, size and thickness facilitates the preparation of dispersions with pre-determined properties such as high monolayer-content, leading to first measurement of A-exciton MoS2 luminescence in liquid suspensions. These techniques are general and can be applied to a range of two-dimensional materials including WS2, MoSe2 and WSe2.

Suggested Citation

  • Claudia Backes & Ronan J. Smith & Niall McEvoy & Nina C. Berner & David McCloskey & Hannah C. Nerl & Arlene O’Neill & Paul J. King & Tom Higgins & Damien Hanlon & Nils Scheuschner & Janina Maultzsch &, 2014. "Edge and confinement effects allow in situ measurement of size and thickness of liquid-exfoliated nanosheets," Nature Communications, Nature, vol. 5(1), pages 1-10, December.
  • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms5576
    DOI: 10.1038/ncomms5576
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    Cited by:

    1. Jin Wang & Zeyuan Song & Miaolu He & Yongchao Qian & Di Wang & Zheng Cui & Yuan Feng & Shangzhen Li & Bo Huang & Xiangyu Kong & Jinming Han & Lei Wang, 2024. "Light-responsive and ultrapermeable two-dimensional metal-organic framework membrane for efficient ionic energy harvesting," Nature Communications, Nature, vol. 15(1), pages 1-13, December.

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