Structural and spectroscopic investigations on graphene oxide foils irradiated by ion beams for dosimetry application. (June 2021)

• Record Type: Journal Article
• Authors: Manno, D.; Serra, A.; Buccolieri, A.; Calcagnile, L.; Cutroneo, M.; Torrisi, A.; Silipigni, L.; Torrisi, L.
• Is Part Of: Vacuum. Volume 188(2021)
• Publication Date: 2021-06
• Subjects: Vacuum -- Periodicals; 621.55
• DOI: 10.1016/j.vacuum.2021.110185
• Languages: English
• ISSNs: 0042-207X

Abstract

Abstract: Different ion beams, from protons up to gold ions, with energy from 2 MeV up to 16 MeV, have been employed to irradiate graphene oxide (GO) foils in vacuum. The ion energy deposition reduces GO releasing functional oxygen groups. The effect of radiating ions – GO foils interaction has been investigated by Raman spectroscopy, X-Ray Diffraction (XRD) and Transmission Electron Microscopy (TEM). All the performed analyses show that both reduction and damaging depend on the fluence, the energy and the type of radiating ions. In the regime of electron stopping power the reduction is linearly dependent on the absorbed dose, while in the regime of nuclear stopping power an intense damage is produced in GO, altering the Raman spectrum and producing defects and amorphization of the material. The achieved goal was to quantify the GO's response to ionizing radiation with the aim of using the GO foil as a dosimeter for high energy ion beams. Highlights: Surface ion irradiation of GO films from protons up to gold ions, with energy from 2 MeV up to 16 MeV. Raman spectroscopy, XRD and TEM investigations of the GO reduction process induced by ions irradiation. Determination of the linear dependence regime of the reduction from the absorbed dose. Potential use GO foils in ionizing radiation dosimetry.