Document Type
Article
Publication Date
10-28-2025
Department
Department of Physics
Abstract
Sulfur hexafluoride (SF6), widely used as an insulating gas in the power industry, decomposes during long-term operation into byproducts such as H2S, SO2, SO2F2, and SOF2. Reliable detection of these compounds is essential, since their type and concentration provide diagnostic signatures of faults in gas-insulated switchgear. We employ density functional theory combined with nonequilibrium Green’s function calculations to evaluate pristine two-dimensional carbon allotropes with nonhexagonal rings, namely Graphene+, T-graphene, and Biphenylene, as potential field-effect nanosensors. To characterize the surfaces’ atomic structures, we simulated scanning tunneling microscopy images for filled states. Each surface exhibits a distinct brightness pattern that allows its identification. All interactions occur via physisorption, enabling rapid recovery and device reusability. Graphene+ uniquely identifies SO2and SOF2at a single gate voltage, while T-graphene and Biphenylene selectively detect H2S and SO2. These findings demonstrate that nonhexagonal carbon nanosheets combine high sensitivity, fast recovery, and intrinsic selectivity, underscoring their potential for real-time monitoring of SF6degradation products in power systems.
Publication Title
ACS Applied Nano Materials
Recommended Citation
Spalenza, P.,
de Souza, F.,
Rodrigues, D.,
Amorim, R.,
Villegas, C.,
Scopel, W.,
&
Pandey, R.
(2025).
Reliable Detection of SF6Breakdown Byproducts Using 2D Non-Hexagonal Carbon Allotrope Nanosheets.
ACS Applied Nano Materials,
8(44), 21532-21541.
http://doi.org/10.1021/acsanm.5c03937
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p2/2154
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.
Version
Publisher's PDF
Publisher's Statement
Copyright © 2025 The Authors. Published by American Chemical Society. Publisher’s version of record: https://doi.org/10.1021/acsanm.5c03937