Modification of thin carbon films by UVc light. Issue 1 (March 2021)

• Record Type: Journal Article
• Authors: Milenov, T; Dikovska, A; Avramova, I; Karaivanova, D; Avdeev, G; Terziyska, P; Dimov, D; Karashanova, D; Georgieva, B; Kolev, S; Valcheva, E
• Is Part Of: Journal of physics. Volume 1859:Issue 1(2021)
• Publication Date: 2021-03
• Subjects: Physics -- Congresses; 530.5
• DOI: 10.1088/1742-6596/1859/1/012008
• Languages: English
• ISSNs: 1742-6588

Abstract

Abstract: We modified single- and few-layer nano-sized graphene films deposited by pulsed laser deposition (PLD) on ∼300-nm-thick SiO2 /Si substrates. The samples were irradiated by a UVC lamp (wavelength of 254 nm) for 15 and 30 minutes in air atmosphere. The light was directed almost parallel (about 2 - 2.5 arcdeg declination angle) to the films' surface. The influence of the modification was evaluated by ellipsometry and X-ray photoelectron and Raman spectroscopies. The results showed that the irradiation caused an increase of the C-O/C-OH bond and a decrease or the complete disappearance of the -C=O/-COOH bond. The structural quality of the graphene films was improved moderately after a 15-min UVC treatment.