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Electron Emission Properties of Self-Assembling Nanodiamond‒Polymer Nanocomposite Coatings

  • NANOMATERIALS AND CERAMICS
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Abstract

The formation of thin-film coatings from detonation nanodiamond (DND) suspensions on atomically ordered conducting Ni–W substrates by self-assembly in an evaporating aqueous solution using the spin coating technique has been investigated. It is shown that, in the absence of a polymer matrix, the DND distribution over the substrate is nonuniform and the adhesion to the substrate is weak, which prevents obtaining a uniform and stable emission current. The use of DND–water-soluble polymer (chitosan and carrageenan polysaccharides, polyacrylic acid, and sulfonated polyaniline (SPANI)) coatings makes it possible to enhance the film adhesion to the substrate and provide a disaggregated state of nanocrystallites. The DND–SPANI coatings have demonstrated the best emission characteristics. Based on the analysis of the emission characteristics, a new model of emission center in the DND–polymer–substrate system has been proposed.

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Funding

This study was supported in part by the Ministry of Science and Higher Education of the Russian Federation within a State assignment for the Federal Research Center “Crystallography and Photonics” of the Russian Academy of Sciences and in part by the “Improving of Competitiveness” Program of the National Research Nuclear University MEPhI. A.T. Dideykin and A.Ya. Vul’ acknowledge the support within a State assignment, theme no. 0040-2014-0013.

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Authors and Affiliations

  1. Photochemistry Center, Federal Research Center “Crystallography and Photonics,” Russian Academy of Sciences, 119421, Moscow, Russia

    P. V. Lebedev-Stepanov, A. L. Vasiliev & G. A. Yurasik

  2. National Research Nuclear University MEPhI, 115409, Moscow, Russia

    P. V. Lebedev-Stepanov

  3. Ioffe Institute, 194021, St. Petersburg, Russia

    A. T. Dideykin & A. Ya. Vul’

  4. National Research Center “Kurchatov Institute,”, 123182, Moscow, Russia

    S. N. Chvalun, A. L. Vasiliev, T. E. Grigoryev, A. N. Korovin & S. I. Belousov

  5. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, 119991, Moscow, Russia

    S. P. Molchanov

Authors
  1. P. V. Lebedev-Stepanov
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  2. A. T. Dideykin
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  3. S. N. Chvalun
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  4. A. L. Vasiliev
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  5. T. E. Grigoryev
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  6. A. N. Korovin
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  7. S. I. Belousov
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  8. S. P. Molchanov
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  9. G. A. Yurasik
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  10. A. Ya. Vul’
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Corresponding author

Correspondence to P. V. Lebedev-Stepanov.

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Translated by E. Bondareva

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Lebedev-Stepanov, P.V., Dideykin, A.T., Chvalun, S.N. et al. Electron Emission Properties of Self-Assembling Nanodiamond‒Polymer Nanocomposite Coatings. Crystallogr. Rep. 64, 817–822 (2019). https://doi.org/10.1134/S1063774519050134

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  • DOI: https://doi.org/10.1134/S1063774519050134

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