Jump to main content
Jump to site search

Issue 7, 2016
Previous Article Next Article

Friction and conductance imaging of sp2- and sp3-hybridized subdomains on single-layer graphene oxide

Author affiliations

Abstract

We investigated the subdomain structures of single-layer graphene oxide (GO) by characterizing local friction and conductance using conductive atomic force microscopy. Friction and conductance mapping showed that a single-layer GO flake has subdomains several tens to a few hundreds of nanometers in lateral size. The GO subdomains exhibited low friction (high conductance) in the sp2-rich phase and high friction (low conductance) in the sp3-rich phase. Current–voltage spectroscopy revealed that the local current flow in single-layer GO depends on the quantity of hydroxyl and carboxyl groups, and epoxy bridges within the 2-dimensional carbon layer. The presence of subdomains with different sp2/sp3 carbon ratios on a GO flake was also confirmed by chemical mapping using scanning transmission X-ray microscopy. These results suggest that spatial mapping of the friction and conductance can be used to rapidly identify the composition of heterogeneous single-layer GO at nanometer scale, which is essential for understanding charge transport in nanoelectronic devices.

Graphical abstract: Friction and conductance imaging of sp2- and sp3-hybridized subdomains on single-layer graphene oxide

Back to tab navigation

Supplementary files

Publication details

The article was received on 19 Sep 2015, accepted on 14 Jan 2016 and first published on 15 Jan 2016


Article type: Paper
DOI: 10.1039/C5NR06469D
Nanoscale, 2016,8, 4063-4069

  •   Request permissions

    Friction and conductance imaging of sp2- and sp3-hybridized subdomains on single-layer graphene oxide

    H. Lee, N. Son, H. Y. Jeong, T. G. Kim, G. S. Bang, J. Y. Kim, G. W. Shim, K. C. Goddeti, J. H. Kim, N. Kim, H. Shin, W. Kim, S. Kim, S. Choi and J. Y. Park, Nanoscale, 2016, 8, 4063
    DOI: 10.1039/C5NR06469D

Search articles by author

Spotlight

Advertisements