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

Abstract

Electrochemical, chemiresistive and wearable sensors based on tin oxide (SnO2) were investigated for chemical sensing applications. There is an increased usage of SnO2 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 SnO2 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 SnO2 nanomaterials for the development of chemiresistive, electrochemical, and wearable sensors.

Voltammetric Determination of Hesperidin on the Electrode Modified with SnO2 Nanoparticles and Surfactants

“…Electrochemically inert metal oxide nanoparticles in particular SnO 2 NPs can be considered as an alternative for the electrode surface modification. Chemical inertness, high surface area and biocompartibility can be successfully applied in creation of novel modified electrodes [29][30][31]. Nevertheless, there are two problems of their application in electroanalysis caused by insufficient conductivity and aggregation in dispersions.…”

Recent Advances in Electrochemical Biosensors: Applications, Challenges, and Future Scope

“…In addition to this, nanomaterials have also been used for such purposes. When the antibody is detected using antigens, the resistance of electron transfer would tend to increase, which eventually decreases the capacitance [ 4 ]. The nanoparticles of gold can be used for entrapping antibodies as they do not affect their activity and performance [ 5 ].…”

“…[ 2 ]. Recently, various new elements, such as molecularly imprinted polymers, aptamers, nanomaterials, etc., have been developed in the field of biosensors [ 3 , 4 , 5 , 6 , 7 ]. The growth of nanotechnology has provided strong benefits to the biosensor field as the nanomaterials have a large surface-to-volume ratio that helps in achieving higher sensitivity and efficiency [ 8 ].…”

Aplicação da nanotecnologia na engenharia de alimentos: uma revisão

“…O desenvolvimento de sensores baseia-se na aplicação de dispositivos de detecção em conjunto com transdutores, de forma a transmitir e amplificar sinais encontrados na interação de diferentes agentes, para posterior conversão, processamento e aplicação em diversos setores. Ao selecionar um sensor para um processo deve-se optar pela melhor seletividade, limite de detecção, estabilidade e sensibilidade (Sharma et al, 2021).…”