-A A +A
In this work, we demonstrate that solution-processed In2Se3 nanosheets exhibit exceptional selectivity and sensitivity to NO2 gas, making them a promising candidate for gas detection systems. Theoretical simulations and surface-science experiments reveal the unique surface properties of In2Se3 nanosheets, which prevent physisorption of oxygen, carbon monoxide, and carbon dioxide, making them remarkably stable towards oxidation and CO-poisoning. Moreover, we show that NO2 molecules adsorb stably on In2Se3 nanosheets, particularly on Se vacancies, even at high temperatures. The coadsorption of water further enhances NO2 sticking on the In2Se3 surface, making it an ideal material for gas sensing applications in humid and harsh environments. The fabricated In2Se3 gas sensors exhibit excellent and reversible sensing response to NO2 gas, with a limit of detection of 5 ppb at 300 °C, and a highly …
Royal Society of Chemistry
Publication date: 
1 Jan 2023

Gianluca D'Olimpio, Vardan Galstyan, Corneliu Ghica, Mykhailo Vorokhta, Marian Cosmin Istrate, Chia-Nung Kuo, Chin Shan Lue, Danil W Boukhvalov, Elisabetta Comini, Antonio Politano

Biblio References: 
Journal of Materials Chemistry A