Graphene Functionalized by Doping and Defects for Gas Sensor Application

Zhang, Qingwei; Xu, Y.X.; Zhang, Junan; Lu, Ye; Tian, Jinrong

doi:10.18494/sam.2021.3296

Cited by 3 publications

(2 citation statements)

References 87 publications

(96 reference statements)

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“…This is to highlight that CNWs can be used to detect a variety of different gases, which can be useful in multi-gas sensing applications. Further improvement of the performance of CNW-based gas sensors presented in this work can be achieved through modification of the surface of CNWs [89,90], decoration of the walls with noble metals [24,91,92], and employing various doping mechanisms [93][94][95].…”

Section: Gas-sensing Propertiesmentioning

confidence: 99%

Carbon nanowall-based gas sensors for carbon dioxide gas detection

Zhumadilov,

Yerlanuly,

Parkhomenko

et al. 2024

Nanotechnology

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Carbon nanowalls (CNWs) have attracted significant attention for gas sensing applications due to their exceptional material properties such as large specific surface area, electric conductivity, nano- and/or micro-porous structure, and high charge carrier mobility. In this work, CNW films were synthesized and used to fabricate gas sensors for carbon dioxide (CO2) gas sensing. The CNW films were synthesized using an ICP PECVD method and their structural and morphological properties were characterized using Raman spectroscopy and electron microscopy. The obtained CNW films were used to fabricate gas sensors employing interdigitated gold (Au) microelectrodes. The gas sensors were fabricated using both direct synthesis of CNW films on interdigitated Au microelectrodes on quartz and also transferring presynthesized CNW films onto interdigitated Au microelectrodes on glass. The CO2 gas-sensing properties of fabricated devices were investigated for different concentrations of CO2 gas and temperature-ranges. The sensitivities of fabricated devices were found to have a linear dependence on the concentration of CO2 gas and increase with temperature. It was revealed that devices in which CNW films have a maze-like structure perform better compared to the ones that have a petal-like structure. A sensitivity value of 1.18% was obtained at 500 ppm CO2 concentration and 100 °C device temperature. The CNW-based gas sensors have the potential for the development of easy-to-manufacture and efficient gas sensors for toxic gas monitoring.

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Section: Gas-sensing Propertiesmentioning

confidence: 99%

Carbon nanowall-based gas sensors for carbon dioxide gas detection

Zhumadilov,

Yerlanuly,

Parkhomenko

et al. 2024

Nanotechnology

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“…Doping graphene derivatives with heteroatoms are promising materials for highperformance sensing, 34 for example gas and toxic gas sensors. [35][36][37][38][39] The detection of target analytes using graphene materials is mostly depend on the changes of the conductance aer the adsorption of analytes to be sensed. 34 Graphene-boron nitride heterostructures have been utilised as gas sensor.…”

Section: Introductionmentioning

confidence: 99%

Discriminating sensing of explosive molecules using graphene–boron nitride–graphene heteronanosheets

et al. 2022

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Noise Spectrum as a Source of Information in Gas Sensors Based on Liquid-Phase Exfoliated Graphene

et al. 2022

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Surfaces of adsorption-based gas sensors are often heterogeneous, with adsorption sites that differ in their affinities for gas particle binding. Knowing adsorption/desorption energies, surface densities and the relative abundance of sites of different types is important, because these parameters impact sensor sensitivity and selectivity, and are relevant for revealing the response-generating mechanisms. We show that the analysis of the noise of adsorption-based sensors can be used to study gas adsorption on heterogeneous sensing surfaces, which is applicable to industrially important liquid-phase exfoliated (LPE) graphene. Our results for CO2 adsorption on an LPE graphene surface, with different types of adsorption sites on graphene flake edges and basal planes, show that the noise spectrum data can be used to characterize such surfaces in terms of parameters that determine the sensing properties of the adsorbing material. Notably, the spectrum characteristic frequencies are an unambiguous indicator of the relative abundance of different types of adsorption sites on the sensing surface and their surface densities. We also demonstrate that spectrum features indicate the fraction of the binding sites that are already occupied by another gas species. The presented study can be applied to the design and production of graphene and other sensing surfaces with an optimal sensing performance.

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Graphene Functionalized by Doping and Defects for Gas Sensor Application

Cited by 3 publications

References 87 publications

Carbon nanowall-based gas sensors for carbon dioxide gas detection

Carbon nanowall-based gas sensors for carbon dioxide gas detection

Discriminating sensing of explosive molecules using graphene–boron nitride–graphene heteronanosheets

Noise Spectrum as a Source of Information in Gas Sensors Based on Liquid-Phase Exfoliated Graphene

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