Dipole-modified graphene with ultrahigh gas sensibility

Jia, Runping; Xie, Peng; Feng, Yongliang; Chen, Zhuo; Umar, Ahmad; Wang, Yao

doi:10.1016/j.apsusc.2018.01.166

Cited by 18 publications

(8 citation statements)

References 40 publications

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“…A comparison between the sensing performances of this proposed sensor and other NO 2 sensors based on graphene is summarized in Table 1. 10,[61][62][63][64][65] We found that the effect of RTA treatment and UV illumination on monolayer graphene in this study could be used to detect NO 2 in the concentration range from 1 to 5 ppm with a complete recovery within 900 s at room temperature, which is better than other NO 2 sensors and suitable for long-term and precise sensing applications.…”

Section: No 2 Gas Sensing Performancementioning

confidence: 72%

“…9 Several room temperature NO 2 gas sensors based on graphene have been reported in the past decade. [10][11][12] For example, ppb level sensing was demonstrated under high vacuum and argon environments. 11 In order to detect NO 2 in air environment, Kodu et al deposited ZrO 2 and Ag nanoparticles on the graphene surface by pulsed laser deposition and reported detection down to 40 ppb, 12 but the recovery to the original baseline was incomplete.…”

Section: Introductionmentioning

confidence: 99%

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Annealing effect on UV-illuminated recovery in gas response of graphene-based NO₂ sensors

et al. 2019

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Section: No 2 Gas Sensing Performancementioning

confidence: 72%

Section: Introductionmentioning

confidence: 99%

Annealing effect on UV-illuminated recovery in gas response of graphene-based NO₂ sensors

et al. 2019

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“…[8][9][10][11][12][13].Among the various sensing techniques, gas sensors have attracted considerable attention because of their facile manufacturing process, high sensitivity, and low detection limit [14][15][16][17]. The literature reveals that metal-oxide materials are the most widely used scaffold to fabricate gas sensors [15][16][17][18][19][20]. In particular, metal-oxide materials are widely utilized to fabricate sensors for toxic and explosive gases [20][21][22][23][24].…”

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confidence: 99%

ZnO Nanocrystal-Based Chloroform Detection: Density Functional Theory (DFT) Study

et al. 2019

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We investigated the detection of chloroform (CHCl3) using ZnO nanoclusters via density functional theory calculations. The effects of various concentrations of CHCl3, as well as the deposition of O atoms, on the adsorption over ZnO nanoclusters were analyzed via geometric optimizations. The calculated difference between the highest occupied molecular orbital and the lowest unoccupied molecular orbital for ZnO was 4.02 eV. The most stable adsorption characteristics were investigated with respect to the adsorption energy, frontier orbitals, elemental positions, and charge transfer. The results revealed that ZnO nanoclusters with a specific geometry and composition are promising candidates for chloroform-sensing applications.

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“…Normally, the charge density distribution in a gas-solid interaction system is asymmetrical, and a built-in electric field with a net dipole moment will be generated [ 182 ]. The larger the dipole moment, the larger the amount of the exchanged electrons between the gas molecules and the sensing material [ 183 ]. An external electric field could thus offset or enhance the built-in electric field and therefore is able to control the direction and quantity of the charge transfer [ 182 , 184 , 185 ].…”

Section: Mxenesmentioning

confidence: 99%

Recent Development of Gas Sensing Platforms Based on 2D Atomic Crystals

et al. 2021

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Sensors, capable of detecting trace amounts of gas molecules or volatile organic compounds (VOCs), are in great demand for environmental monitoring, food safety, health diagnostics, and national defense. In the era of the Internet of Things (IoT) and big data, the requirements on gas sensors, in addition to sensitivity and selectivity, have been increasingly placed on sensor simplicity, room temperature operation, ease for integration, and flexibility. The key to meet these requirements is the development of high-performance gas sensing materials. Two-dimensional (2D) atomic crystals, emerged after graphene, have demonstrated a number of attractive properties that are beneficial to gas sensing, such as the versatile and tunable electronic/optoelectronic properties of metal chalcogenides (MCs), the rich surface chemistry and good conductivity of MXenes, and the anisotropic structural and electronic properties of black phosphorus (BP). While most gas sensors based on 2D atomic crystals have been incorporated in the setup of a chemiresistor, field-effect transistor (FET), quartz crystal microbalance (QCM), or optical fiber, their working principles that involve gas adsorption, charge transfer, surface reaction, mass loading, and/or change of the refractive index vary from material to material. Understanding the gas-solid interaction and the subsequent signal transduction pathways is essential not only for improving the performance of existing sensing materials but also for searching new and advanced ones. In this review, we aim to provide an overview of the recent development of gas sensors based on various 2D atomic crystals from both the experimental and theoretical investigations. We will particularly focus on the sensing mechanisms and working principles of the related sensors, as well as approaches to enhance their sensing performances. Finally, we summarize the whole article and provide future perspectives for the development of gas sensors with 2D materials.

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Dipole-modified graphene with ultrahigh gas sensibility

Cited by 18 publications

References 40 publications

Annealing effect on UV-illuminated recovery in gas response of graphene-based NO₂ sensors

Annealing effect on UV-illuminated recovery in gas response of graphene-based NO₂ sensors

ZnO Nanocrystal-Based Chloroform Detection: Density Functional Theory (DFT) Study

Recent Development of Gas Sensing Platforms Based on 2D Atomic Crystals

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Dipole-modified graphene with ultrahigh gas sensibility

Cited by 18 publications

References 40 publications

Annealing effect on UV-illuminated recovery in gas response of graphene-based NO2 sensors

Annealing effect on UV-illuminated recovery in gas response of graphene-based NO2 sensors

ZnO Nanocrystal-Based Chloroform Detection: Density Functional Theory (DFT) Study

Recent Development of Gas Sensing Platforms Based on 2D Atomic Crystals

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Product

Resources

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Annealing effect on UV-illuminated recovery in gas response of graphene-based NO₂ sensors

Annealing effect on UV-illuminated recovery in gas response of graphene-based NO₂ sensors