In this paper, we investigate humidity sensing through impedance measurements with TiO2 nanoparticles (about 6 nm in diameter). The transient behavior and the impedance spectra are measured and interpreted from the theoretical point of view. Large responses are shown especially in the relative humidity range from 30% to 80%, which are essentially explained by condensation in the nanopores. The effect of the addition of Au nanoparticles is investigated and as expected, the Au/TiO2 interfaces allow for dramatically reducing the sensing film response time and above all, its recovery time; moreover, it seems to favor condensation when the relative humidity overcomes 70%.

Addabbo, T., Cappelli, I., Fort, A., Mugnaini, M., Panzardi, E., Vignoli, V., et al. (2021). The effect of au nanoparticle addition on humidity sensing with ultra-small tio2 nanoparticles. CHEMOSENSORS, 9(7), 170 [10.3390/chemosensors9070170].

The effect of au nanoparticle addition on humidity sensing with ultra-small tio2 nanoparticles

Addabbo T.;Cappelli I.;Fort A.;Mugnaini M.;Panzardi E.;Vignoli V.;Viti C.
2021

Abstract

In this paper, we investigate humidity sensing through impedance measurements with TiO2 nanoparticles (about 6 nm in diameter). The transient behavior and the impedance spectra are measured and interpreted from the theoretical point of view. Large responses are shown especially in the relative humidity range from 30% to 80%, which are essentially explained by condensation in the nanopores. The effect of the addition of Au nanoparticles is investigated and as expected, the Au/TiO2 interfaces allow for dramatically reducing the sensing film response time and above all, its recovery time; moreover, it seems to favor condensation when the relative humidity overcomes 70%.
Addabbo, T., Cappelli, I., Fort, A., Mugnaini, M., Panzardi, E., Vignoli, V., et al. (2021). The effect of au nanoparticle addition on humidity sensing with ultra-small tio2 nanoparticles. CHEMOSENSORS, 9(7), 170 [10.3390/chemosensors9070170].
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11365/1173268