Jump to main content
Jump to site search

Issue 12, 2014
Previous Article Next Article

Non-invasive transmission electron microscopy of vacancy defects in graphene produced by ion irradiation

Author affiliations

Abstract

Irradiation with high-energy ions has been widely suggested as a tool to engineer properties of graphene. Experiments show that it indeed has a strong effect on graphene's transport, magnetic and mechanical characteristics. However, to use ion irradiation as an engineering tool requires understanding of the type and detailed characteristics of the produced defects which is still lacking, as the use of high-resolution transmission microscopy (HRTEM) – the only technique allowing direct imaging of atomic-scale defects – often modifies or even creates defects during imaging, thus making it impossible to determine the intrinsic atomic structure. Here we show that encapsulating the studied graphene sample between two other (protective) graphene sheets allows non-invasive HRTEM imaging and reliable identification of atomic-scale defects. Using this simple technique, we demonstrate that proton irradiation of graphene produces reconstructed monovacancies, which explains the profound effect that such defects have on graphene's magnetic and transport properties. This finding resolves the existing uncertainty with regard to the effect of ion irradiation on the electronic structure of graphene.

Graphical abstract: Non-invasive transmission electron microscopy of vacancy defects in graphene produced by ion irradiation

Back to tab navigation

Supplementary files

Publication details

The article was received on 09 Apr 2014, accepted on 20 Apr 2014 and first published on 22 Apr 2014


Article type: Paper
DOI: 10.1039/C4NR01918K
Citation: Nanoscale, 2014,6, 6569-6576
  •   Request permissions

    Non-invasive transmission electron microscopy of vacancy defects in graphene produced by ion irradiation

    O. Lehtinen, I.-Ling Tsai, R. Jalil, R. R. Nair, J. Keinonen, U. Kaiser and I. V. Grigorieva, Nanoscale, 2014, 6, 6569
    DOI: 10.1039/C4NR01918K

Search articles by author

Spotlight

Advertisements