An innovative approach to overcome saturation and recovery issues of CVD graphene-based gas sensors

Conference paper (2017)

Authors

F. Ricciardella Electronic Components, Technology and Materials - EEMCS
S. Vollebregt Electronic Components, Technology and Materials - EEMCS
T. Polichetti ENEA Research Center
B. Alfano ENEA UTTP-MDB
E. Massera ENEA UTTP-MDB
Pasqualina M Sarro Electronic Components, Technology and Materials - EEMCS
Research Group
Electronic Components, Technology and Materials (EEMCS) (TU Delft)
Copyright: © 2017 F. Ricciardella, S. Vollebregt, Tiziana Polichetti, B. Alfano, E. Massera, Pasqualina M Sarro
DOI: https://doi.org/10.1109/ICSENS.2017.8234284
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Published Date

2017

Language

English

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Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Microelectronics

Research Group

Electronic Components, Technology and Materials

Abstract


In this work, we present an innovative method which enables to solve fundamental limitations affecting graphene-based chemi-sensors operating under environmental conditions, namely the lack of signal saturation and the scarce recovery after the detection step. The method, which exploits the differential current instead of the current itself, is validated by applying it on different devices having an exposed area equal to 512 pm2. The analysis is performed by adopting nitrogen dioxide (NO2) as target gas in the range from 0.12 ppm to 1.5 ppm. The approach reliability is further confirmed by performing sensing tests towards NO2 with the relative humidity set at two different levels, 30% and 50%.

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