The Effect of Au Nanoparticle Addition on Humidity Sensing with Ultra-Small TiO2 Nanoparticles
| Autor: | Enza Panzardi, Valerio Vignoli, Cecilia Viti, Ada Fort, Marco Mugnaini, Irene Cappelli, Tommaso Addabbo |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
TiO2 nanoparticles
Materials science water adsorption/desorption Nanoparticle 02 engineering and technology QD415-436 humidity sensing 01 natural sciences Biochemistry Analytical Chemistry Gold nanoparticles Humidity sensing TiO 2 nanoparticles Water adsorption/desorption Relative humidity Physical and Theoretical Chemistry Range (particle radiation) 010401 analytical chemistry Condensation Humidity Response time 021001 nanoscience & nanotechnology 0104 chemical sciences Nanopore Chemical engineering Colloidal gold gold nanoparticles 0210 nano-technology |
| Zdroj: | Chemosensors Volume 9 Issue 7 Chemosensors, Vol 9, Iss 170, p 170 (2021) |
| ISSN: | 2227-9040 |
| DOI: | 10.3390/chemosensors9070170 |
| Popis: | 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%. |
| Databáze: | OpenAIRE |
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