Issue 1, 2024

Graphene-based chemiresistive gas sensors

Abstract

Gas sensors allow the monitoring of the chemical environment of humans, which is often crucial for their wellbeing or even survival. Miniaturization, reversibility, and selectivity are some of the key challenges for serial use of chemical sensors. This tutorial review describes critical aspects when using nanomaterials as sensing substrates for the application in chemiresistive gas sensors. Graphene has been shown to be a promising candidate, as it allows gas sensors to be operated at room temperature, possibly saving large amounts of energy. In this review, an overview is given on the general mechanisms for gas-sensitive semiconducting materials and the implications of doping and functionalization on the sensing parameters of chemiresistive devices. It shows in detail how different challenges, like sensitivity, response time, reversibility and selectivity have been approached by material development and operation modes. In addition, perspectives from the area of data analysis and intelligent algorithms are presented, which can further enhance these sensors' usability in the field.

Graphical abstract: Graphene-based chemiresistive gas sensors

Article information

Article type
Review Article
Submitted
16 Jūn. 2023
Accepted
17 Okt. 2023
First published
23 Okt. 2023
This article is Open Access
Creative Commons BY-NC license

Nanoscale Adv., 2024,6, 11-31

Graphene-based chemiresistive gas sensors

P. Recum and T. Hirsch, Nanoscale Adv., 2024, 6, 11 DOI: 10.1039/D3NA00423F

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