Issue 6, 2021

Simple and rapid gas sensing using a single-walled carbon nanotube field-effect transistor-based logic inverter

Abstract

Single-walled carbon nanotubes (SWCNTs) are promising candidates for gas sensing applications, providing an efficient solution to the device miniaturization challenge and allowing low power consumption. SWCNT gas sensors are mainly based on field-effect transistors (SWCNT-FETs) where the modification of the current flowing through the nanotube is used for gas detection. A major limitation of these SWCNT-FETs lies in the difficulty to measure their transfer curves, since the flowing current typically varies between 10−12 and 10−3 A. Thus, voluminous and energy consuming systems are necessary, severely limiting the miniaturization and low energy consumption. Here, we propose an inverter device that combines two SWCNT-FETs which brings a concrete solution to these limitations and simplifies data processing. In this innovative sensing configuration, the gas detection is based on the variation of an electric potential in the volt range instead of a current intensity variation in the microampere range. In this study, the proof of concept is performed using NO2 gas but can be easily extended to a wide range of gases.

Graphical abstract: Simple and rapid gas sensing using a single-walled carbon nanotube field-effect transistor-based logic inverter

  • This article is part of the themed collection: Gas sensing

Supplementary files

Article information

Article type
Communication
Submitted
02 Okt. 2020
Accepted
30 Janv. 2021
First published
01 Febr. 2021
This article is Open Access
Creative Commons BY-NC license

Nanoscale Adv., 2021,3, 1582-1587

Simple and rapid gas sensing using a single-walled carbon nanotube field-effect transistor-based logic inverter

S. Forel, L. Sacco, A. Castan, I. Florea and C. S. Cojocaru, Nanoscale Adv., 2021, 3, 1582 DOI: 10.1039/D0NA00811G

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