This review paper discusses the properties of nanomaterials, namely graphene, molybdenum disulfide, carbon nanotubes, and quantum dots for unique sensing applications. Based on the specific analyte to be detected and the functionalization techniques that are employed, some noteworthy sensors that have been developed are discussed. Further, biocompatible sensors fabricated from these materials capable of detecting specific chemical compounds are also highlighted for COVID-19 detection purposes, which can aid in efficient and reliable sensing as well as timely diagnosis.

Background/Objectives: In recent years, the research on molybdenum disulphide (MoS 2 ) has gained significance because of its unique properties and ease of incorporation in hybrid structures, which makes it one of the most suitable materials for devices and multifaceted Applications. The objective of the study is to synthesize MoS 2 nanofilms and then to characterize them through X-ray diffraction (XRD) technique. Methods: In this study, MoS 2 nanofilms are synthesized on silicon dioxide substrates by the thermal Chemical Vapour Deposition (CVD) technique, where molybdenum trioxide (MoO 3 ) (VI) powder and sulphur (S) flakes are used as precursors. Findings: X-ray diffraction (XRD) measurements have been carried out for the thermal CVD grown MoS 2 nanofilm samples. Further, the observed XRD data has been analyzed and the structural analysis of synthesized MoS 2 nanofilms is presented in this report. Furthermore, the experimentally observed findings are compared with the standard findings and shown that they are resembling closely. Novelty/Applications: In order to highlight the scope of our work, the important applications, of the molybdenum disulphide nanostructures are also discussed, that make MoS 2 nanostructures attractive candidates in fields as diverse as energy, environmental, biomedical and semiconductors.

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