Review—Recent Advances in Tin Oxide Nanomaterials as Electrochemical/Chemiresistive Sensors

Electrochemical, chemiresistive and wearable sensors based on tin oxide (SnO 2 ) were investigated for chemical sensing applications. There is an increased usage of SnO 2 as modifier electrode materials because of its astonishing features of thermal stability, biocompatibility, excellent bandgap, cost effective and abundant availability. The surface of working electrode is modified by nanomaterials of SnO 2 in combination with various metals, semiconductors and carbon derivatives for improved sensing performance. Various voltammetric and amperometric techniques were involved in studying the electrochemical properties and behaviour of the anlaytes at the surface of modified electrodes. This review focused on some recent works that provides an overview of the applications of SnO 2 nanomaterials for the development of chemiresistive, electrochemical, and wearable sensors.