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Issue 15, 2013
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Low cost acetone sensors with selectivity over water vapor based on screen printed TiO2nanoparticles

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Abstract

Noninvasive breath acetone sensors, in particular metal oxide based chemo-resistive sensors, have been actively researched recently for daily diabetes diagnosis. To find a safer alternative to the flame spray pyrolysis processing method, screen printing of commercial TiO2 paste is employed in the fabrication of metal oxide semiconductor chemo-resistors, without involving open flame, high temperature and costly instruments. The TiO2 sensing layer is found to have a desirable porous structure, with a specific surface area of 72.7 m2 g−1, when investigated using scanning electron microscopy and the Brunauer–Emmett–Teller isotherm. The new sensors are able to detect 1.5 ppm acetone, and are sensitive enough for type I diabetes diagnosis. The sensitivity survives in the presence of 90% relative humidity, offering a long targeted selectivity yet to be achieved, but essential for human breath analysis.

Graphical abstract: Low cost acetone sensors with selectivity over water vapor based on screen printed TiO2 nanoparticles

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Publication details

The article was received on 07 Mar 2013, accepted on 18 May 2013 and first published on 21 May 2013


Article type: Paper
DOI: 10.1039/C3AY40373D
Anal. Methods, 2013,5, 3709-3713

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    Low cost acetone sensors with selectivity over water vapor based on screen printed TiO2 nanoparticles

    L. L. Deng, C. X. Zhao, Y. Ma, S. S. Chen and G. Xu, Anal. Methods, 2013, 5, 3709
    DOI: 10.1039/C3AY40373D

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