MoS2 hybrid heterostructure thin film decorated with CdTe quantum dots for room temperature NO2 gas sensor

Jaiswal, Jyoti; Sanger, Amit; Tiwari, Pranjala

doi:10.1016/j.snb.2019.127437

Cited by 110 publications

(32 citation statements)

References 68 publications

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“…On the contrary, n-type MoS 2 was also used for device fabrication. The n-type-CdTe quantum dots also used on n-type MoS 2 nanoworms to enhance the sensing performance [ 350 ]. The device showed an excellent response of 40% over pristine MoS 2 .…”

Section: Mos 2 -Heterostructure No 2 mentioning

confidence: 99%

Strategy and Future Prospects to Develop Room-Temperature-Recoverable NO2 Gas Sensor Based on Two-Dimensional Molybdenum Disulfide

2021

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Nitrogen dioxide (NO2), a hazardous gas with acidic nature, is continuously being liberated in the atmosphere due to human activity. The NO2 sensors based on traditional materials have limitations of high-temperature requirements, slow recovery, and performance degradation under harsh environmental conditions. These limitations of traditional materials are forcing the scientific community to discover future alternative NO2 sensitive materials. Molybdenum disulfide (MoS2) has emerged as a potential candidate for developing next-generation NO2 gas sensors. MoS2 has a large surface area for NO2 molecules adsorption with controllable morphologies, facile integration with other materials and compatibility with internet of things (IoT) devices. The aim of this review is to provide a detailed overview of the fabrication of MoS2 chemiresistance sensors in terms of devices (resistor and transistor), layer thickness, morphology control, defect tailoring, heterostructure, metal nanoparticle doping, and through light illumination. Moreover, the experimental and theoretical aspects used in designing MoS2-based NO2 sensors are also discussed extensively. Finally, the review concludes the challenges and future perspectives to further enhance the gas-sensing performance of MoS2. Understanding and addressing these issues are expected to yield the development of highly reliable and industry standard chemiresistance NO2 gas sensors for environmental monitoring.

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Section: Mos 2 -Heterostructure No 2 mentioning

confidence: 99%

Strategy and Future Prospects to Develop Room-Temperature-Recoverable NO2 Gas Sensor Based on Two-Dimensional Molybdenum Disulfide

2021

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“…Sensors based on low-dimensional materials, including carbon nanotubes, graphene, and black phosphorus, have been widely investigated as promising alternatives to MO x . ,− ,− Semiconducting two-dimensional (2D) transition metal dichalcogenides (TMDCs) have been widely investigated as promising gas-sensing materials due to their high surface-to-volume ratio, favorable surface energy levels for gas adsorption, high mobilities, and high current on/off ratios. − A number of TMDCs have shown low detection limits for NO 2 operating at room temperature (RT). − Recently, platinum diselenide (PtSe 2 ) has gained huge interest for selective NO 2 sensing with a low limit of detection (LOD) in the range of few ppb and an extremely fast response time (few seconds) when exposed to 0.1 ppm. , …”

Section: Introductionmentioning

confidence: 99%

Calibration of Nonstationary Gas Sensors Based on Two-Dimensional Materials

et al. 2020

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Two-dimensional materials (2DMs) have high potential in gas sensing, due to their large surface-to-volume ratio. However, most sensors based on 2DMs suffer from the lack of a steady state during gas exposure, hampering sensor calibration. Here, we demonstrate that analysis of the time differential of the signal output enables the calibration of chemiresistors based on platinum or tungsten diselenide (PtSe 2 , WSe 2 ) and molybdenum disulfide (MoS 2 ), which present nonstationary behavior. 2DMs are synthesized by thermally assisted conversion of predeposited metals on a silicon/silicon dioxide substrate and therefore are integrable with standard complementary metal−oxide semiconductor (CMOS) technology. We analyze the behavior of the sensors at room temperature toward nitrogen dioxide (NO 2 ) in a narrow range from 0.1 to 1 ppm. This study overcomes the problem of the absence of steady-state signals in 2DM gas sensors and thus facilitates their usage in this highly important application.

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“…These outstanding sensing performances outperform the current state-of-the-art 2D material-based NO2 chemiresistors operated at room temperature in air (Fig. 5 and Supplementary Table 8) 15,41,42,43,44,45,46,47,48,49,50 . To the best of our knowledge, the NO2 responses of our sensors are the highest among MOF-based NO2 sensors, and even superior to other 2D materials, including graphene, transition metal dichalcogenides (TMDs), and their composites.…”

mentioning

confidence: 77%

Large-area synthesis of nanoscopic catalyst-decorated conductive MOF film using microfluidic-based solution shearing

Kim

Koo

Kim

et al. 2021

Preprint

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Conductive metal-organic framework (C-MOF) thin-films have a wide variety of potential applications in the field of electronics, sensors, and energy devices. The immobilization of various functional species within the pores of C-MOFs can further improve the performance and extend the potential applications of C-MOFs thin-films. However, there are currently no effective strategies for facile and scalable synthesis of high quality ultra-thin C-MOFs while simultaneously immobilizing functional species within the MOF pores. Here, we develop microfluidic channel-embedded solution-shearing (MiCS) for ultra-fast (≤ 5 mm/s) and large-area synthesis of high-quality nanocatalyst-embedded C-MOF thin-films with thickness controllability down to tens of nanometers. The MiCS method synthesizes nanoscopic catalyst-embedded C-MOF particles within the microfluidic channels, and simultaneously grows catalyst-embedded C-MOF thin-film uniformly over a large area using solution shearing. The thin-film displays highest nitrogen dioxide (NO2) sensing properties at room temperature in air amongst two-dimensional materials, owing to the high surface area and porosity of the ultra-thin C-MOFs, and the catalytic activity of the nanoscopic catalysts embedded in the C-MOFs. Therefore, our method, i.e. MiCS, can open new avenues of highly active and conductive porous materials for various applications.

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MoS2 hybrid heterostructure thin film decorated with CdTe quantum dots for room temperature NO2 gas sensor

Cited by 110 publications

References 68 publications

Strategy and Future Prospects to Develop Room-Temperature-Recoverable NO2 Gas Sensor Based on Two-Dimensional Molybdenum Disulfide

Strategy and Future Prospects to Develop Room-Temperature-Recoverable NO2 Gas Sensor Based on Two-Dimensional Molybdenum Disulfide

Calibration of Nonstationary Gas Sensors Based on Two-Dimensional Materials

Large-area synthesis of nanoscopic catalyst-decorated conductive MOF film using microfluidic-based solution shearing

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