Dear colleagues,

Sensor technology is the talk of the town among the research community due to the broad range of applications ranging from detection of gases to liquids. Among the high-performance liquid chromatography (HPLC), fluorescence, gas chromatography, and capillary zone electrophoresis the electrochemical method is an alternative to these conventional sensing techniques and facilitates highly sensitive detection of analytes. Chemosensors or Chemical sensors like biosensors are electrochemical sensors. But unlike biosensors that detect biomolecules, chemosensors detect chemicals and chemical contaminants. Chemical sensors are of various types and extend from those that detect poisonous gases like SOXs and NOXs to those that detect hazardous chemicals and organic compounds like C 6 H 6 , C 7 H 8 , C 2 H 5 OH, and CH 3 COCH 3 . The choice of electrode material is a crucial factor in the fabrication of these sensors and a wide variety of materials such as, metal oxides, metal chalcogenides, polymers, nanocomposites and carbon-based materials have been considered for the same. Although, significant progress has been made in achieving the rapid detection of analytes, challenges pertaining to improving the specificity, stability, and responsiveness of the sensors still persist. The amplification of their manufacturing process is another arena that requires potential focus. Understanding the sensing mechanism at the electrode-electrolyte surface by employing in-situ spectroscopy techniques is the need of the hour. This understanding can help in further design & development of materials that enable accurate, rapid detection of chemical analytes. This section therefore is devoted to the recent developments in chemical sensors to help scientific community as well as beginners of sensors research to make significant contributions an advance the field further.