CHAPTER 9: Metal Chalcogenides-based Disposable Sensors

Disposable sensors are affordable and easy-to-operate instruments for rapid determination in various fields such as biomedical, food, environmental, etc. The growing demand is due to rapid, easy to access and consistent data collection in clinical and environmental samples. The existing spectroscopy and microscopy techniques are sophisticated and require more time per analysis, which has motivated researchers to find an alternate sensing methodology. Amongst various developed sensing strategies, electrochemical sensing strategies attracted tremendous interest due to its rapid response, affordable, minimal sample requirement, easy-to-operate in a different medium. The nanostructured electrode materials play vital roles in electrochemical sensor performance. Recently, a series of stretchable, flexible (e.g., cellulose paper, polyethylene sheets, ITO, and FTO) and movement sensors occupy the central part for the development of medical sensors. In addition to the substrate matrix, 2D electrode materials i.e., metal chalcogenides derived from different synthetic methods are attracted much attention. This is due to the easy and tuneable preparation methods, controlled synthesis, high electrochemical activity, etc. Hence, the present chapter is designed in such a way to explore the disposable sensor based on metal chalcogenides, its opportunities and challenges.