Articles | Volume 3, issue 2
J. Sens. Sens. Syst., 3, 241–244, 2014
https://doi.org/10.5194/jsss-3-241-2014

Special issue: Advanced functional materials for environmental monitoring...

J. Sens. Sens. Syst., 3, 241–244, 2014
https://doi.org/10.5194/jsss-3-241-2014

Regular research article 09 Oct 2014

Regular research article | 09 Oct 2014

A simple method to recover the graphene-based chemi-resistor signal

F. Fedi et al.

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Cited articles

Charlier, J. C., Arnaud, L., Avilov, I. V., Delgado, M., Demoisson, F, Espinosa, E. H., Ewels, C. P., Felten, A., Guillot, J., Ionescu, R., Leghrib, R., Llobet, E., Mansour, A., Migeon, H. N., Pireaux, J. J., Reniers, F., Suarez-Martinez, I., Watson, G. E., and Zanolli, Z.: Carbon nanotubes randomly decorated with gold clusters: from nano2hybrid atomic structures to gas sensing prototypes, Nanotechnology, 20, 375501, https://doi.org/10.1088/0957-4484/20/37/375501, 2009.
Chen, R. J., Franklin, N. R., Kong, J., Cao, J., Tombler, T. W., Zhang, Y., and Dai, H.: Molecular photodesorption from single-walled carbon nanotubes, Appl. Phys. Lett., 79, 2258–2260, 2001.
Fedi, F., Ricciardella, F., Polichetti, T., Miglietta, M. L., Massera, E., and Di Francia, G.: Exfoliation of Graphite and Dispersion of Graphene in Solutions of Low-Boiling-Point Solvents for Use in Gas Sensors, in: Sensors and Microsystems, Springer, 2014.
Hyman, M. P. and Medlin, J. W.: Theoretical study of the adsorption and dissociation of oxygen on Pt (111) in the presence of homogeneous electric fields, J. Phys. Chem. B, 109, 6304–6310, 2005.
Khan, U., O'Neill, A., Lotya, M., De, S., and Coleman, J. N.: High-Concentration Solvent Exfoliation of Graphene, Small, 6, 864–871, 2010.
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Short summary
We present the development of a simple and fast method for restoring exhaust graphene-based chemi-resistors used for NO2 detection. Exposing the devices repeatedly to gases or to air for more than two days, an overall worsening of the sensing signal is observed. Starting from this hypothesis and from the observation that nitrogen dioxide is soluble in water, we performed a recovery method consisting in the dipping of exhaust devices into ultrapure water at 100°C for 60 sec.