Fast-neutron irradiation effects on monolayer MoS2. (1st May 2019)

• Record Type: Journal Article
• Authors: Tang, Ge; Pam, Mei Er; Zhang, Hui; Shu, Zhiwen; Feng, Peng; Wei, Biao; Ang, LayKee; Yang, Hui Ying; Li, Mo
• Is Part Of: Applied physics express. Volume 12:Number 5(2019)
• Publication Date: 2019-05-01
• Subjects: monolayer MoS2 -- neutron irradiation -- defect engineering -- PL -- Raman -- XPS; Physics -- Periodicals; Technology -- Periodicals; 621.05
• DOI: 10.7567/1882-0786/ab18b5
• Languages: English
• ISSNs: 1882-0778

Abstract

Abstract: We investigated neutron irradiation effects on monolayer MoS2 by photoluminescence (PL), Raman and X-ray photoelectron spectroscopy. Results revealed that Mo and S defects and oxidation replacements of S vacancies were generated by neutron irradiation, leading to the red-shifts and broadenings of the E 1 2 g and A1g Raman modes, as well as the red-shift of the A-exciton peak and quenching in the PL spectra. The relative atomic content ratio of S to Mo decreased with the increase of neutron flux, indicating that the neutron irradiation assisted in the release of S atoms.