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

Filiberto Ricciardella, Sten Vollebregt, Tiziana Polichetti, B. Alfano, E. Massera, Lina Sarro

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

4 Citations (Scopus)
23 Downloads (Pure)

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%.
Original languageEnglish
Title of host publicationProceedings of IEEE Sensors Conference 2017
Place of PublicationPiscataway, NJ
PublisherIEEE
Pages1-3
Number of pages3
ISBN (Electronic)978-1-5090-1012-7
ISBN (Print)978-1-5090-1013-4
DOIs
Publication statusPublished - 2017
EventIEEE SENSORS 2017 - Glasgow, United Kingdom
Duration: 29 Oct 20171 Nov 2017
http://ieee-sensors2017.org/

Conference

ConferenceIEEE SENSORS 2017
CountryUnited Kingdom
CityGlasgow
Period29/10/171/11/17
Internet address

Keywords

  • Graphene-based gas sensors
  • differential calibration method
  • NO2
  • environmental conditions
  • chemical vapor deposition
  • transfer-free process

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