The Role of Additives in Suppressing the Degradation of Liquid-Exfoliated WS₂ Monolayers.

ABSTRACT: Group VI transition metal dichalcogenides (TMDs) are considered to be chemically widely inert, but recent reports point toward an oxidation of monolayered sheets in ambient conditions, due to defects. To date, the degradation of monolayered TMDs is only studied on individual, substrate-supported nanosheets with varying defect type and concentration, strain, and in an inhomogeneous environment. Here, degradation kinetics of WS₂ nanosheet ensembles in the liquid phase are investigated through photoluminescence measurements, which selectively probe the monolayers. Monolayer-enriched WS₂ dispersions are produced with varying lateral sizes in the two common surfactant stabilizers sodium cholate (SC) and sodium dodecyl sulfate (SDS). Well-defined degradation kinetics are ob

SUBMITTER: Karger L 

PROVIDER: S-EPMC11469120 | biostudies-literature | 2021 Oct

REPOSITORIES: biostudies-literature