The Effect of Au Nanoparticle Addition on Humidity Sensing with Ultra-Small TiO2 Nanoparticles
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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%.
2011 ◽
Vol 304
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pp. 48-52
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2009 ◽
Vol 79-82
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pp. 365-368
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2001 ◽
Vol 76
(1-3)
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pp. 322-326
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2017 ◽
Vol 5
(16)
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pp. 3924-3931
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2004 ◽
Vol 100
(1-2)
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pp. 126-130
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2021 ◽
Vol 9
(3)
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pp. 276-278