Hydrothermally Fluorinated Graphene Oxide Chemiresistive Sensor for Detecting NH3 and Acetone under Atmospheric Conditions

Ivan Amor, Bruno Gamero, Siziwe Bebe, Ravi Prakash

2021

Abstract

Emergence of graphene-derived highly functional materials has transformed chemical and bio sensing, with several novel approaches utilizing chemical modification of graphene oxide (GO). These materials have been implemented in device fabrication for the detection of biomolecules, volatile organic compounds (VOC), and other chemical analytes. The detection methods rely on using specificity of the modified graphene material to target selective and quantifiable electrical responses. In this work, we report ultra-low-level detection of NH3 (1-10 ppm) and extend the same chemiresistor sensor to additionally detect acetone and distinguish between their individual transient responses. The low-level detection of both these gaseous analytes is highly relevant, and the comparable physiological detection range of these analytes makes the device suitable for continuous health monitoring and detecting specific gas molecules in exhaled breath. The sensor system is compactly designed to make it low cost and ideal for wearable health monitoring and environmental monitoring, using an in-house hydrothermal fluorination technique to synthesize fluorinated-GO (FGO) suspension, and its solution-phase deposition onto interdigitated chrome electrodes to create the chemiresistive gas sensor. The sensor device reported a highly linear detection range for NH3, ranging over 1 – 10 ppm and was additionally able to detect acetone in a similar low concentration range, whilst distinguishing the two gases based on its rapid transient response.

Paper Citation

in Harvard Style

Amor I., Gamero B., Bebe S. and Prakash R. (2021). Hydrothermally Fluorinated Graphene Oxide Chemiresistive Sensor for Detecting NH3 and Acetone under Atmospheric Conditions. In Proceedings of the 14th International Joint Conference on Biomedical Engineering Systems and Technologies (BIOSTEC 2021) - Volume 1: BIODEVICES; ISBN 978-989-758-490-9, SciTePress, pages 99-106. DOI: 10.5220/0010241200002865

in Bibtex Style

@conference{biodevices21,
author={Ivan Amor and Bruno Gamero and Siziwe Bebe and Ravi Prakash},
title={Hydrothermally Fluorinated Graphene Oxide Chemiresistive Sensor for Detecting NH3 and Acetone under Atmospheric Conditions},
booktitle={Proceedings of the 14th International Joint Conference on Biomedical Engineering Systems and Technologies (BIOSTEC 2021) - Volume 1: BIODEVICES},
year={2021},
pages={99-106},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0010241200002865},
isbn={978-989-758-490-9},
}

in EndNote Style

TY - CONF

JO - Proceedings of the 14th International Joint Conference on Biomedical Engineering Systems and Technologies (BIOSTEC 2021) - Volume 1: BIODEVICES
TI - Hydrothermally Fluorinated Graphene Oxide Chemiresistive Sensor for Detecting NH3 and Acetone under Atmospheric Conditions
SN - 978-989-758-490-9
AU - Amor I.
AU - Gamero B.
AU - Bebe S.
AU - Prakash R.
PY - 2021
SP - 99
EP - 106
DO - 10.5220/0010241200002865
PB - SciTePress