Al-doped GeS nanosheet as a promising sensing material for O-contained volatile organic compounds detection

Pu, Kaiwen; Dai, Xianying; Bu, Yuyu; Ren, Guoqiang; Tao, Wenluo; Jia, Difan; Song, Jialin; Zhao, Tongtong; Feng, Li

doi:10.1016/j.apsusc.2020.146797

Cited by 24 publications

(13 citation statements)

References 88 publications

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“…The sensor exhibited the highest response to acetone compared to the other VOCs due to the higher absorption energy of acetone compared with other VOCs, which is in agreement with DFT simulation results reported in the literature. [ 26 ]…”

Section: Resultsmentioning

confidence: 99%

“…Unlike phosphorene, group‐IV monochalcogenides MX cannot be easily oxidized due to strong polar chemical bonding. [ 26 ] Therefore, the electronic properties of 2D monochalcogenides MX can be relatively preserved in ambient conditions.…”

Section: Introductionmentioning

confidence: 99%

“…2D Germanium Sulfide (GeS) is an oxide‐resistance material from the 2D monochalcogenide MX family, which has a high carrier mobility of 3680 cm 2 V −1 s −1 , a large bandgap of 1.6 eV, high photoresponse, piezoelectric properties, and tunable band structure by external modulation. [ 26 , 27 ] Density functional theory (DFT) studies have shown that VOC molecules are physisorbed on GeS surface via weak van der walls interaction, leading to a high rate of charge transfer and enhanced thermodynamic stability and sensitivity. [ 26 ] Furthermore, Ulaganathan et al fabricated a broadband photodetector based on multi‐layered GeS with superior photoresponse, high stability, and fast response.…”

Section: Introductionmentioning

confidence: 99%

“…[ 26 , 27 ] Density functional theory (DFT) studies have shown that VOC molecules are physisorbed on GeS surface via weak van der walls interaction, leading to a high rate of charge transfer and enhanced thermodynamic stability and sensitivity. [ 26 ] Furthermore, Ulaganathan et al fabricated a broadband photodetector based on multi‐layered GeS with superior photoresponse, high stability, and fast response. [ 28 ] These unique features suggest that 2D GeS could be a remarkable candidate for high‐performance photo‐assisted VOC detection.…”

Section: Introductionmentioning

confidence: 99%

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Unique Photoactivated Time‐Resolved Response in 2D GeS for Selective Detection of Volatile Organic Compounds

et al. 2023

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Volatile organic compounds (VOCs) sensors have a broad range of applications including healthcare, process control, and air quality analysis. There are a variety of techniques for detecting VOCs such as optical, acoustic, electrochemical, and chemiresistive sensors. However, existing commercial VOC detectors have drawbacks such as high cost, large size, or lack of selectivity. Herein, a new sensing mechanism is demonstrated based on surface interactions between VOC and UV‐excited 2D germanium sulfide (GeS), which provides an effective solution to distinguish VOCs. The GeS sensor shows a unique time‐resolved electrical response to different VOC species, facilitating identification and qualitative measurement of VOCs. Moreover, machine learning is utilized to distinguish VOC species from their dynamic response via visualization with high accuracy. The proposed approach demonstrates the potential of 2D GeS as a promising candidate for selective miniature VOCs sensors in critical applications such as non‐invasive diagnosis of diseases and health monitoring.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Unique Photoactivated Time‐Resolved Response in 2D GeS for Selective Detection of Volatile Organic Compounds

et al. 2023

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“…At another distance in case 1.5-4 Å the adsorption energy doesn't modify and the system become unstable resulting from positive interaction energy [22]. High negative adsorption energy means the system is more stable, so that the pure graphene materials were more stable than Al-doped in distance far from the surface [23]. But in distance 1 Å for Al-doped graphene materials, chemical adsorption for HCN was modified and it is become-33.2277 eV compared with the pure system.…”

Section: -2 Adsorption Energymentioning

confidence: 99%

Investigation the ability of pure and Al-doped graphene nano materials to detect toxic gases using first principle study

Al-Aaraji¹,

Yaseen

Madlol³

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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In the present study, the density function theory (DFT) method was used to compute structural, electronic and spectroscopic properties for pure and aluminum (Al) doped graphene materials, 6-13G basis set and hybrid function B3LYP were used in the present study. The structural properties show that pure and Al-doped graphene materials have a plane surface, also all bond lengths are in agreement with experimental results. Energy gap calculation shows that pure and Al-doped graphene materials have having semiconductor nature. When hydro cyanide gas molecule will have interacted on the surface of pure and Al-doped graphene materials, properties belonging to the systems under study will change. The result shows that interaction of HCN gas molecule with Al-doped graphene material the surface will rise up, but in the pure system, the surface remains plane. Adsorption calculation shows that HCN gas molecule can interact with the surface of a system under study. high chemical adsorption appears at a distance 1 Å between the gas molecule and pure and Al-doped graphene materials. Increasing adsorption distance interaction strength will be decreased until reached 0.002 eV. Positive adsorption energy refers to the repulsion force between the gas molecule and the surface. Fourier transformation infrared radiation (FT-IR) spectroscopy has been used to point-free radicals for interacted systems. It is pointed to carbon groups such as C-C, C-H, C-N and C-Al, also results show that all wave numbers results are in agreement with previous reports. Appear cyanide radical is a sign of chemical adsorption between gas molecules and the surface of pure and Al-doped graphene materials.

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Graphene-like BC6N nanosheets are potential candidates for detection of volatile organic compounds (VOCs) in human breath: A DFT study

Aghaei

Aasi

Farhangdoust

et al. 2021

Applied Surface Science

101

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Al-doped GeS nanosheet as a promising sensing material for O-contained volatile organic compounds detection

Cited by 24 publications

References 88 publications

Unique Photoactivated Time‐Resolved Response in 2D GeS for Selective Detection of Volatile Organic Compounds

Unique Photoactivated Time‐Resolved Response in 2D GeS for Selective Detection of Volatile Organic Compounds

Investigation the ability of pure and Al-doped graphene nano materials to detect toxic gases using first principle study

Graphene-like BC6N nanosheets are potential candidates for detection of volatile organic compounds (VOCs) in human breath: A DFT study

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