title: Graphene oxide layers modified by light energetic ions.
abstract: In this paper, the effect of light ion irradiation on graphene oxide foil structure and composition was studied. Due to the excellent properties of graphene based materials suitable for application in electronics, optoelectronics, micro-mechanics and space technologies, the interaction of energetic ions with graphene based structures is worth studying. From the fundamental point of view, it is also interesting to get information about graphene oxide structure modification and the possible functional properties after irradiation by energetic ions. The light ion irradiation of graphene oxide (GO) foil was performed using 2.5 MeV H+and 5.1 MeV He2+ions. The change in the elemental composition of the GO foils after ion irradiation was investigated using Rutherford Backscattering Spectrometry and Elastic Recoil Detection Analysis. The influence of ion irradiation was further studied by microscopy methods. The chemical composition and structural changes of the GO foil surface were characterized by spectroscopy techniques including XPS, FTIR and Raman spectroscopy. Although the results of ion beam analysis indicated no significant compositional changes in the bulk of GO foils connected to ion irradiation, XPS, ATR-FTIR and Raman spectroscopy revealed reduction and removal of oxygen functionalities on the surface of graphene oxide. This reduction leads to a surface resistivity decrease after ion irradiation dependent on the ion species, fluence and energy.
authors.affiliation: Institute of Nuclear Physics AS CR, v.v.i., Husinec - ŘeŽ, 130, 250 68 ŘeŽ, Czech Republic. malinsky@ujf.cas.cz.
authors.forename: Petr
authors.initials: P
authors.lastname: Malinský
authors.affiliation: Institute of Nuclear Physics AS CR, v.v.i., Husinec - ŘeŽ, 130, 250 68 ŘeŽ, Czech Republic. malinsky@ujf.cas.cz and Department of Physics, Faculty of Science, J.E. Purkinje University, Ceske Mladeze 8, 400 96 Usti nad Labem, Czech Republic.
authors.forename: Anna
authors.initials: A
authors.lastname: Macková
authors.affiliation: Institute of Nuclear Physics AS CR, v.v.i., Husinec - ŘeŽ, 130, 250 68 ŘeŽ, Czech Republic. malinsky@ujf.cas.cz and Department of Physics, Faculty of Science, J.E. Purkinje University, Ceske Mladeze 8, 400 96 Usti nad Labem, Czech Republic.
authors.forename: Romana
authors.initials: R
authors.lastname: Mikšová
authors.affiliation: Institute of Nuclear Physics AS CR, v.v.i., Husinec - ŘeŽ, 130, 250 68 ŘeŽ, Czech Republic. malinsky@ujf.cas.cz and Department of Physics, Faculty of Science, J.E. Purkinje University, Ceske Mladeze 8, 400 96 Usti nad Labem, Czech Republic.
authors.forename: Helena
authors.initials: H
authors.lastname: Kováčiková
authors.affiliation: Institute of Nuclear Physics AS CR, v.v.i., Husinec - ŘeŽ, 130, 250 68 ŘeŽ, Czech Republic. malinsky@ujf.cas.cz.
authors.forename: Mariapompea
authors.initials: M
authors.lastname: Cutroneo
authors.affiliation: Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague 6, Czech Republic. zdenek.sofer@vscht.cz.
authors.forename: Jan
authors.initials: J
authors.lastname: Luxa
authors.affiliation: Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague 6, Czech Republic. zdenek.sofer@vscht.cz.
authors.forename: Daniel
authors.initials: D
authors.lastname: Bouša
authors.affiliation: Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague 6, Czech Republic. zdenek.sofer@vscht.cz.
authors.forename: Beata
authors.initials: B
authors.lastname: Štrochová
authors.affiliation: Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague 6, Czech Republic. zdenek.sofer@vscht.cz.
authors.forename: Zdeněk
authors.identifier: http://orcid.org/0000-0002-1391-4448
authors.initials: Z
authors.lastname: Sofer