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 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.
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