Chemical and Mechanical Sensing of Graphene and MoS2 2D Materials

Abstract

Sensing technologies have garnered significant attention owing to their significance in both present-day and future contexts. Numerous industries, particularly the food and health- care sectors, are actively pursuing the development of high-performance sensors. These sensors are crucial in enhancing quality standards within these sectors. The miniaturiza- tion of sensor technologies utilizing conventional semiconductors is approaching its inher- ent limitations, wherein the ability to build them at increasingly smaller scales is becoming increasingly challenging while still ensuring optimal performance. Nanotechnologies have given rise to a novel discipline known as 2D material science, which involves the fabrication of nanoscale thin materials exhibiting distinctive structures and electrical properties. Graphene and MoS2, belonging to the TMDs group, are well recog- nized as prominent 2D materials. These materials exhibit distinctive mechanical, elec- trical, and thermal characteristics, rendering them highly suitable for the development of effective nanoscale sensors. This work employs graphene and MoS2 as sensors, with graphene balls serving as mech- anical sensors and MoS2 as chemical sensors. The paper elucidates the synthesis of these two-dimensional materials and outlines the procedure for evaluating the sensing capabil- ities of each material. I kindly request that you rewrite your text to adhere to academic standards. In this study, a two-dimensional (2D) MoS2 flake is employed as a chem- ical sensor to investigate its sensitivity towards ethanol and IPA compounds upon their introduction into the surface of MoS2. Ultimately, the objective is to evaluate the mech- anical sensing capabilities of the graphene ball by employing an Atomic Force Microscope (AFM) tip to induce strain in the graphene structure and measure the resulting electrical fluctuations.