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Proper vigilance on the levels of various gases of concern, especially toxic ones, is vital for reducing the risk of environmental damage. This impels the demand for highly accurate and adequate gas sensing systems which are in demand but not in practice. This gap can be filled by 5th-generation nano-enabled gas sensors which can offer room-temperature sensing, flexibility, high selectivity, low cost, self-powered operation, humidity resistance, and portable size. These features are the key requirements for integrating gas sensors into modern Internet-of-things (IoT) systems. This perspective highlights trends and progressions (2020-2023) in developing tailored nanomaterials to fabricate cutting-edge gas sensors for high performance in the desired manner and conditions, for example, point-of-care (POC), and point-of-location testing. The challenges associated with such materials and the scientific endeavors to address such issues have also been discussed.
Chakraborty et al. (Tue,) studied this question.