Surface modification studies of edge-oriented molybdenum sulfide nanosheets

Abstract

We have synthesized edge-oriented MoS 2 nanoaheets by the evaporation of a single source precursor based on Mo(IV)- tetrakis(diethylaminodithiocarbomato). The surface chemistry of the MoS 2 nanosheets has been studied in order to evaluate the chemical reactivities of the basal planes and edges. By irradiating the MoS 2 nanosheet with a scanning infrared laser, micron-scale lithographical structures can be created due to laser-induced oxidation of MoS 2 to form nanocrystalline MoS 2. Preferential reactivities of the MoS 2 basal edges in an electrochemical environment and during vapor phase deposition have been demonstrated. Functionalization of the basal plane with 1-pyrene acetic acid allows the immobilization of DNA and immunoglobins on the MoS 2 basal plane.