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Graphene oxide layers modified by light energetic ions.

Petr Malinský1, Anna Macková2, Romana Mikšová2

  • 1Institute of Nuclear Physics AS CR, v.v.i., Husinec - ŘeŽ, 130, 250 68 ŘeŽ, Czech Republic. malinsky@ujf.cas.cz.

Physical Chemistry Chemical Physics : PCCP
|April 6, 2017
PubMed
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Light ion irradiation of graphene oxide (GO) foils reduced oxygen functionalities on the surface. This modification decreased surface resistivity, showing potential for electronic and space applications.

Area of Science:

  • Materials Science
  • Nanotechnology
  • Surface Science

Background:

  • Graphene-based materials possess excellent properties for electronics, optoelectronics, micro-mechanics, and space technologies.
  • Understanding the interaction of energetic ions with graphene structures is crucial for material modification and property tuning.
  • Graphene oxide (GO) is a promising derivative with tunable properties, but its response to ion irradiation requires detailed investigation.

Purpose of the Study:

  • To investigate the effect of light ion irradiation (H+ and He2+) on the structure and composition of graphene oxide foils.
  • To analyze the modification of oxygen functionalities and surface resistivity of GO after ion bombardment.
  • To correlate irradiation parameters (ion species, fluence, energy) with observed changes in GO.

Main Methods:

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  • Irradiation of GO foils using 2.5 MeV H+ and 5.1 MeV He2+ ions.
  • Elemental composition analysis using Rutherford Backscattering Spectrometry (RBS) and Elastic Recoil Detection Analysis (ERDA).
  • Surface and structural characterization using X-ray Photoelectron Spectroscopy (XPS), Attenuated Total Reflectance Fourier Transform Infrared Spectroscopy (ATR-FTIR), and Raman Spectroscopy.

Main Results:

  • Ion beam analysis revealed no significant changes in the bulk elemental composition of GO foils.
  • Spectroscopic techniques (XPS, ATR-FTIR, Raman) demonstrated a reduction and removal of oxygen functionalities on the GO surface.
  • A decrease in surface resistivity was observed post-irradiation, dependent on ion species, fluence, and energy.

Conclusions:

  • Light ion irradiation effectively modifies the surface chemistry of graphene oxide by reducing oxygen-containing groups.
  • The observed decrease in surface resistivity suggests potential for tailoring GO conductivity through ion beam processing.
  • These findings highlight the utility of ion irradiation as a method for functionalizing graphene oxide for advanced applications.