We synthesized colloidal 2H-MoS2 nanosheets based on the previously reported protocol to obtain mono-and bilayers with a lateral dimension of approximately 20-25 nm. The Moprecursor was prepared by dissolving molybdenum(V)-chloride in a mixture of oleylamine and oleic acid of 10:1 by stirring inside a glovebox for 2 days. The concentration of the precursor was set to 240 mM. For the nanosheet synthesis, elemental sulfur (87.5 mg, 2.73 mmol) and 17 mL oleylamine were added to a three-neck flask and degassed under vacuum from an oilpump for 30 min at 85°C. During this step, the sulfur dissolved, and the solution turned dark.