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

We present the development of a simple and fast method for restoring exhaust graphene-based chemi-resistors used for NO<sub>2</sub> detection. Repeatedly exposing the devices to gases or to air for more than 2 days, an overall worsening of the sensing signal is observed; we hypothesized...

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Main Authors: F. Fedi, F. Ricciardella, M. L. Miglietta, T. Polichetti, E. Massera, G. Di Francia
Format: Article
Language:English
Published: Copernicus Publications 2014-10-01
Series:Journal of Sensors and Sensor Systems
Online Access:http://www.j-sens-sens-syst.net/3/241/2014/jsss-3-241-2014.pdf
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spelling doaj-2650b9fcdfa6405bbe8f17d16a49538a2020-11-24T23:19:49ZengCopernicus PublicationsJournal of Sensors and Sensor Systems2194-87712194-878X2014-10-013224124410.5194/jsss-3-241-2014A simple method to recover the graphene-based chemi-resistor signalF. Fedi0F. Ricciardella1M. L. Miglietta2T. Polichetti3E. Massera4G. Di Francia5CNR-Institute for Composite and Biomedical Materials, Portici (Naples), ItalyENEA UTTP-MDB Laboratory, R. C. Portici (Naples), ItalyENEA UTTP-MDB Laboratory, R. C. Portici (Naples), ItalyENEA UTTP-MDB Laboratory, R. C. Portici (Naples), ItalyENEA UTTP-MDB Laboratory, R. C. Portici (Naples), ItalyENEA UTTP-MDB Laboratory, R. C. Portici (Naples), ItalyWe present the development of a simple and fast method for restoring exhaust graphene-based chemi-resistors used for NO<sub>2</sub> detection. Repeatedly exposing the devices to gases or to air for more than 2 days, an overall worsening of the sensing signal is observed; we hypothesized that the poisoning effect in both cases is caused by the exposure to NO<sub>2</sub>. Starting from this hypothesis and from the observation that NO<sub>2</sub> is soluble in water, we performed a recovery method consisting in the dipping of exhaust devices into ultrapure water at 100 °C for 60 s. The device performances are compared with those obtained after the restoration is achieved using the typical annealing under vacuum method.http://www.j-sens-sens-syst.net/3/241/2014/jsss-3-241-2014.pdf
collection DOAJ
language English
format Article
sources DOAJ
author F. Fedi
F. Ricciardella
M. L. Miglietta
T. Polichetti
E. Massera
G. Di Francia
spellingShingle F. Fedi
F. Ricciardella
M. L. Miglietta
T. Polichetti
E. Massera
G. Di Francia
A simple method to recover the graphene-based chemi-resistor signal
Journal of Sensors and Sensor Systems
author_facet F. Fedi
F. Ricciardella
M. L. Miglietta
T. Polichetti
E. Massera
G. Di Francia
author_sort F. Fedi
title A simple method to recover the graphene-based chemi-resistor signal
title_short A simple method to recover the graphene-based chemi-resistor signal
title_full A simple method to recover the graphene-based chemi-resistor signal
title_fullStr A simple method to recover the graphene-based chemi-resistor signal
title_full_unstemmed A simple method to recover the graphene-based chemi-resistor signal
title_sort simple method to recover the graphene-based chemi-resistor signal
publisher Copernicus Publications
series Journal of Sensors and Sensor Systems
issn 2194-8771
2194-878X
publishDate 2014-10-01
description We present the development of a simple and fast method for restoring exhaust graphene-based chemi-resistors used for NO<sub>2</sub> detection. Repeatedly exposing the devices to gases or to air for more than 2 days, an overall worsening of the sensing signal is observed; we hypothesized that the poisoning effect in both cases is caused by the exposure to NO<sub>2</sub>. Starting from this hypothesis and from the observation that NO<sub>2</sub> is soluble in water, we performed a recovery method consisting in the dipping of exhaust devices into ultrapure water at 100 °C for 60 s. The device performances are compared with those obtained after the restoration is achieved using the typical annealing under vacuum method.
url http://www.j-sens-sens-syst.net/3/241/2014/jsss-3-241-2014.pdf
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