Electrochemical Functionalization of Selectively Addressed MoS₂ Nanoribbons for Sensor Device Fabrication

Tailoring the surface properties of 2D materials, such as transition metal dichalcogenides (TMDCs), at nanoscale is becoming essential in fabrication various material-based nanoelectronic devices. Due to chemical inertness their basal plane, modification TMDCs limited defective sites, often requiring special treatments, conversion TMDC from its semiconducting into metallic phase. In this work, we show that plane a TMDC, molybdenum disulfide (MoS2) can be modified electrochemically by electrografting aryl-diazonium salt. To demonstrate advantages method nanoscale, perform 3,5-bis(trifluoromethyl)benzenediazonium tetrafluoroborate on predefined MoS2 nanoribbons addressing them individually via different electrode. The ability selectively address contacted layers opens possibility for specific neighboring nanostructures functional groups. This could extended other compounds, and materials.