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Humidity sensors are gaining increasing attention because of their relevance for well-being. To meet the ever-growing demand for new cost-efficient materials with superior performances, graphene oxide (GO) based relative humidity sensors have emerged recently as low-cost and highly sensitive devices. However, current GO-based sensors suffer from important drawbacks including slow response and recovery, as well as poor stability. Interestingly, re-duced GO (rGO) exhibits higher stability, yet accompanied by a lower sensitivity to humidity due to its hydrophobic nature. With the aim of improving the sensing performances of rGO, here we report on a novel generation of humidity sensors based on a simple chemical modification of rGO with hydrophilic moieties, i.e. tetraethylene glycol chains. Such hybrid material exhibits an outstandingly improved sensing performance compared to pristine rGO such as high …
American Chemical Society
Publication date: 
3 Sep 2020

Cosimo Anichini, Alessandro Aliprandi, Sai Manoj Gali, Fabiola Liscio, Vittorio Morandi, Andrea Minoia, David Beljonne, Artur Ciesielski, Paolo Samorì

Biblio References: 
ACS Applied Materials & Interfaces