Effect of temperature and exfoliation time on the properties of chemically exfoliated MoS nanosheets.

A systematic investigation of the experimental conditions for the chemical exfoliation of MoS using n-butyllithium as intercalating agent has been carried out to unravel the effect of reaction time and temperature for maximizing the percentage of monolayer thick-flakes and achieve a control over the content of metallic 1T vs. semiconductive 2H phases, thereby tuning the electrical properties of ultrathin MoS few-layer thick films.