Pyrene Coating Transition Metal Disulfides as Protection from Photooxidation and Environmental Aging.

ABSTRACT: Environmental degradation of transition metal disulfides (TMDs) is a key stumbling block in a range of applications. We show that a simple one-pot non-covalent pyrene coating process protects TMDs from both photoinduced oxidation and environmental aging. Pyrene is immobilized non-covalently on the basal plane of exfoliated MoS₂ and WS₂. The optical properties of TMD/pyrene are assessed via electronic absorption and fluorescence emission spectroscopy. High-resolution scanning transmission electron microscopy coupled with electron energy loss spectroscopy confirms extensive pyrene surface coverage, with density functional theory calculations suggesting a strongly bound stable parallel-stacked pyrene coverage of ~2-3 layers on the TMD surfaces. Raman spectroscopy of exfo

SUBMITTER: Canton-Vitoria R 

PROVIDER: S-EPMC7075307 | biostudies-literature | 2020 Feb

REPOSITORIES: biostudies-literature