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Retarding oxidation of copper nanoparticles without electrical isolation and the size dependence of work function

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  • G. Dinesha M.R. Dabera

    (University of Warwick)

  • Marc Walker

    (University of Warwick)

  • Ana M. Sanchez

    (University of Warwick)

  • H. Jessica Pereira

    (University of Warwick)

  • Richard Beanland

    (University of Warwick)

  • Ross A. Hatton

    (University of Warwick)

Abstract

Copper nanoparticles (CuNPs) are attractive as a low-cost alternative to their gold and silver analogues for numerous applications, although their potential has hardly been explored due to their higher susceptibility to oxidation in air. Here we show the unexpected findings of an investigation into the correlation between the air-stability of CuNPs and the structure of the thiolate capping ligand; of the eight different ligands screened, those with the shortest alkyl chain, –(CH2)2–, and a hydrophilic carboxylic acid end group are found to be the most effective at retarding oxidation in air. We also show that CuNPs are not etched by thiol solutions as previously reported, and address the important fundamental question of how the work function of small supported metal particles scales with particle size. Together these findings set the stage for greater utility of CuNPs for emerging electronic applications.

Suggested Citation

  • G. Dinesha M.R. Dabera & Marc Walker & Ana M. Sanchez & H. Jessica Pereira & Richard Beanland & Ross A. Hatton, 2017. "Retarding oxidation of copper nanoparticles without electrical isolation and the size dependence of work function," Nature Communications, Nature, vol. 8(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_s41467-017-01735-6
    DOI: 10.1038/s41467-017-01735-6
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    Cited by:

    1. Kristin Sundberg & Yanggang Wang & Brajendra Mishra & Alexander Carl & Ronald Grimm & Alino Te & Lindsay Lozeau & Richard Sisson & Danielle Cote, 2019. "The Effect of Corrosion on Conventional and Nanomaterial Copper Cold Spray Surfaces for Antimicrobial Applications," Biomedical Journal of Scientific & Technical Research, Biomedical Research Network+, LLC, vol. 22(3), pages 16753-16763, November.

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