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arXiv · 1902.00887

Multi-walled carbon nanotube films for the measurement of the alcoholic concentration

C. Giordano·G. Filatrella·Maria Sarno·A. Di Bartolomeo
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Abstract

We show that a multi-walled carbon nanotube film can be used as the sensing element of a low-cost sensor for the alcoholic concentration in liquid solutions. To this purpose, we investigate the electrical resistance of the film as a function of the isopropanol concentration in a water solution. The analysis reveals a growing resistance with increasing isopropanol concentration and a fast response. The sensing element is re-usable as the initial resistance value is restored once the solution has evaporated. The electrical resistance increases linearly when the multi-walled carbon nanotube film is exposed to common beverages with increasing alcoholic content. This work paves the way for the development of low-cost, miniaturized MWCNT-based sensors for quality monitoring and control of alcoholic beverages and general liquid solutions.

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C. Giordano, G. Filatrella, Maria Sarno, A. Di Bartolomeo. 2019-02-03. Multi-walled carbon nanotube films for the measurement of the alcoholic concentration. https://doi.org/10.1049/mnl.2018.5412

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