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Ultra-thin NaCl films as protective layers for graphene

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Abstract

The ageing of graphene is an important issue that limits its technological applications. Capping layers are a good option for circumventing this problem. In this work, we propose the use of ultra-thin NaCl films as easily-removable protective layers. We have carried out a detailed characterization of the NaCl/graphene interface on metal substrates, namely Cu(111) and Ir(111), by means of complementary microscopy, electron diffraction and spectroscopic techniques. Interestingly, we show that NaCl neither interacts in a chemical way with graphene nor intercalates through it. We demonstrate that the NaCl film is stable under ambient conditions, protecting the graphene surface from oxidation. In addition, after removing the protective layer, graphene remains intact.

Graphical abstract: Ultra-thin NaCl films as protective layers for graphene

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Publication details

The article was received on 09 May 2019, accepted on 07 Jul 2019 and first published on 08 Jul 2019


Article type: Paper
DOI: 10.1039/C9NR03970H
Nanoscale, 2019, Advance Article
  • Open access: Creative Commons BY-NC license
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    Ultra-thin NaCl films as protective layers for graphene

    I. Palacio, K. Lauwaet, L. Vázquez, F. J. Palomares, H. González-Herrero, J. I. Martínez, L. Aballe, M. Foerster, M. García-Hernández and J. Á. Martín-Gago, Nanoscale, 2019, Advance Article , DOI: 10.1039/C9NR03970H

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