Jump to main content
Jump to site search

Issue 19, 2019
Previous Article Next Article

The correlation between electrical conductivity and second-order Raman modes of laser-reduced graphene oxide

Author affiliations

Abstract

Raman spectroscopy is the tool of choice in the physicochemical investigation of carbon nanomaterials. However, Raman analysis of graphene oxide (GO) is lagging in comparison to the rich information gained in the case of carbon nanotubes and graphene. Here, we carried out a joint current sensing atomic force microscopy (CSAFM) and Raman spectroscopy investigation of laser-reduced GO. Reduced graphene oxide (rGO) was obtained under different laser powers in the range from 0.1 to 10 mW (532 nm). We compare the Raman spectra and the electrical conductivity at the nanoscale obtained by current sensing atomic force microscopy. Our analysis shows that three bands in the second-order region (2D, D + G, 2G), in the range from 2500 to 3200 cm−1, are uniquely sensitive to the degree of reduction. Moreover, we found that the changes in peak area ratios AD+G/AD and A2G/AD show a direct correlation with the electrical resistance of rGO. We establish an optical micro-spectroscopy way to assess the degree of reduction in laser-reduced GO. These new insights provide a convenient and useful way to investigate the reduction of rGO from the fitting analysis of Raman spectra, becoming a useful tool in fundamental research and the development of rGO-based microdevices.

Graphical abstract: The correlation between electrical conductivity and second-order Raman modes of laser-reduced graphene oxide

Back to tab navigation

Supplementary files

Publication details

The article was received on 07 Jan 2019, accepted on 24 Apr 2019 and first published on 25 Apr 2019


Article type: Paper
DOI: 10.1039/C9CP00093C
Phys. Chem. Chem. Phys., 2019,21, 10125-10134

  •   Request permissions

    The correlation between electrical conductivity and second-order Raman modes of laser-reduced graphene oxide

    B. Ma, R. D. Rodriguez, A. Ruban, S. Pavlov and E. Sheremet, Phys. Chem. Chem. Phys., 2019, 21, 10125
    DOI: 10.1039/C9CP00093C

Search articles by author

Spotlight

Advertisements