Demonstration of bare Laser reduced Graphene Oxide sensors for Ammonia and Ethanol
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Rivadeneyra Torres, Almudena; Gerardo, Denice; Romero, Francisco J.; Toral López, Víctor; Moraila-Martínez, Carmen Lucía; Morales Santos, Diego Pedro; Rodríguez Santiago, NoelEditorial
IEEE
Materia
C2H5OH gas sensor Graphene NH3 gas sensor Reduced graphene oxide (rGO)
Date
2023Referencia bibliográfica
Published version: A. Rivadeneyra et al. "Demonstration of bare Laser-reduced Graphene Oxide sensors for Ammonia and Ethanol," in IEEE Sensors Journal. [doi: 10.1109/JSEN.2023.3298823]
Sponsorship
MCIN/AEI/10.13039/501100011033: TED2021-129949A-I00; Junta de Andalucía; FEDER funds: ProyExcel_00268, B-RNM-680-UGR20, P20_00265, P20_00633; Spanish Ministry of Sciences and Innovation PID2020-117344RB-I00; Ramón y Cajal fellow RYC2019-027457-I; María Zambrano fellow C21.I4.P1Abstract
In this work, gas sensors using laser-reduced graphene
oxide (LrGO) as sensitive layer have been fabricated and studied.
The laser-synthetized material were structurally and electrically
characterized by means of Scanning Electron Microscopy (SEM),
Raman spectroscopy, X-ray Photoelectron Spectroscopy (XPS) and
the four-point contact method. The gas-sensing properties of the
samples were studied by their exposition to 10 ppm to 100 ppm of
ethanol and 25 ppm to 130 ppm of ammonia. The results show that
the devices present an electrical response corresponding to a purely
resistive behavior up to 100 kHz. It is also demonstrated that the
resistivity of the sensing layer increases as the gas concentration
increases; being of 0.0402 ± 0.001 [%/ppm] for the case of ammonia
and 0.0140 ± 0.001 [%/ppm] for the case of ethanol. These results
outperform existing sensors and establish a better balance in terms of simplicity, sensitivity, linearity and technology
sustainability. In summary, this work especially shows the potential of LrGO for low-cost and low-energy gas sensors
fabrication.