Ultrasensitive room temperature NO2 sensors based on liquid phase exfoliated WSe2 nanosheets

Guo, Ruipeng; Han, Yutong; Chen, Su; Chen, Xinwei; Zeng, Min; Hu, Nantao; Su, Yanjie; Zhou, Zhi‐Hua; Wei, Hao

doi:10.1016/j.snb.2019.127013

Cited by 116 publications

(61 citation statements)

References 56 publications

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“…These limitations of graphene mold the direction of research to discover new nonzero bandgap 2D materials like MoS 2 , MoSe 2 , MoTe 2 , WS 2 , WSe 2 , BP, and many more [ 70 – 83 ]. The interaction between the gas molecules and sensing materials is the indelible part of any gas-sensing process.…”

Section: Introductionmentioning

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: Introductionmentioning

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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“…In addition to MoS 2 , other layered pristine TMDCs were employed for gas sensing and studies have demonstrated WS 2 [94], MoSe 2 [13,41], WSe 2 [95][96][97][98], MoTe 2 [42,43,99,100], and NbS 2 [101] can be used in FET for the detection of O 2 , NO, NO 2 , SO 2 , etc., with a sensing capability of ppm to ppb level. Studies on MoSe 2 FET sensor suggest that gap state variation is the key mechanism in NO 2 sensing based on modeling and quantum transport simulation.…”

Section: Gas Sensingmentioning

confidence: 99%

“…Take gas sensor as an example, MOSFET H 2 sensors show detection limits in the range of hundreds to thousands ppm [34], and MOSFET NO 2 sensors show detection limits over ppm level [35]. In contrast, 2D TMDC FET H 2 sensors have detection limits of several ppm [36][37][38] and the detection limits of NO 2 have reached ppb level [39][40][41][42][43].…”

Section: Introductionmentioning

confidence: 99%

Environmental Analysis with 2D Transition-Metal Dichalcogenide-Based Field-Effect Transistors

2020

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• Recent advances of two-dimensional (2D) transition-metal dichalcogenide (TMDC)-based field-effect transistor (FET) sensors for environmental analysis are summarized. • Representative TMDC FET sensors in gaseous and aqueous media analysis are introduced. • Challenges and future research directions of 2D TMDC FET sensors are discussed. ABSTRACT Field-effect transistors (FETs) present highly sensitive, rapid, and in situ detection capability in chemical and biological analysis. Recently, two-dimensional (2D) transition-metal dichalcogenides (TMDCs) attract significant attention as FET channel due to their unique structures and outstanding properties. With the booming of studies on TMDC FETs, we aim to give a timely review on TMDCbased FET sensors for environmental analysis in different media. First, theoretical basics on TMDC and FET sensor are introduced. Then, recent advances of TMDC FET sensor for pollutant detection in gaseous and aqueous media are, respectively, discussed. At last, future perspectives and challenges in practical application and commercialization are given for TMDC FET sensors. This article provides an overview on TMDC sensors for a wide variety of analytes with an emphasize on the increasing demand of advanced sensing technologies in environmental analysis.

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“…However, only few reports are available on the investigation of its sensing capabilities. In such an attempt, Guo et al exfoliated WSe 2 in NMP to fabricate a reliable room temperature NO 2 chemiresistive sensor 97. The response of the device was varying between 5.06 and 11.01 times for NO 2 in the concentration range of 50 ppb–10 ppm.…”

Section: Tungsten Chalcogenides and Their Gas Sensing Applicationsmentioning

confidence: 99%

Recent Progress in Chemiresistive Gas Sensing Technology Based on Molybdenum and Tungsten Chalcogenide Nanostructures

Jha

Bhat

2020

Adv Materials Inter

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bonding of transition metal and chalcogen atom and their crystal structure. Interestingly, all these compounds exist as layered material except tungsten oxide (WO 3 ) whose hydrated crystal (WO 3 .H 2 O) is layered in nature. [2,3] Each of these chalcogenides possesses unique features. Several micro and nanostructures of these chalcogenides have been synthesized in literature for various applications including gas sensors, biosensors, batteries, supercapacitor, photoelectrochemical and electrochromic devices. However, this review article will focus on gas sensing applications of these materials.Gas sensors play a crucial role in our life as they find applications ranging from monitoring indoor air quality to detecting highly toxic gases. Two important components of a gas sensing device are receptor and transducer. The receptor enables the chemical interaction with the target analyte molecule, which is further converted into analytical signal by the transducer. There are several transduction techniques available in gas sensing based on the physical or chemical change being measured. Broadly, they can be classified into six different classes based on sensing principles which is listed in Table 1.Chemiresistive devices have several advantages over other existing techniques. For example, the structure of these types of devices is very simple and it can be integrated with the current complementary metal oxide semiconductor (CMOS) technology. Even though, several advances have been made over last few years to improve sensing performance, the search for reliable and repeatable gas sensing element is an ongoing endeavor with lots of expectation from tungsten and molybdenum chalcogenides.After the rise of graphene, other layered materials have emerged as important functional materials for various applications of highest scientific values. Among these, layered transition metal dichalcogenides (TMDs) have a special presence as they cover whole class of materials, i.e., ranging from pure insulators to true metals. W and Mo chalcogenides are mostly semiconducting in ambient conditions and therefore, suitable for electronic application such as chemiresistive gas sensors. Though, layered TMDs (MX 2 M = Mo, and W and X = S, Se, and Te) have evolved expeditiously in a very short time, we simply cannot ignore metal oxide (particularly Mo-and W-based Chalcogens are oxygen family elements with oxygen having distinct properties than the other group members like sulfur, selenium, and tellurium. Tungsten and molybdenum chalcogenides that include mainly metal oxides (MO 3 ; M = Mo, and W) and metal dichalcogenides (MX 2 ; X = S, Se, and Te) are the most exciting class of inorganic materials. They have been widely investigated in various applications including lithium and sodium ion storage, supercapacitors, gas sensors, biosensors etc. due to their fascinating surface properties and ease of fabrication. Different class of nanostructures including 0D (nanoparticles, quantum dots), 1D (nanowires, nanotubes, nanoribbons, nanobelts etc.), a...

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Ultrasensitive room temperature NO2 sensors based on liquid phase exfoliated WSe2 nanosheets

Cited by 116 publications

References 56 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

Environmental Analysis with 2D Transition-Metal Dichalcogenide-Based Field-Effect Transistors

Recent Progress in Chemiresistive Gas Sensing Technology Based on Molybdenum and Tungsten Chalcogenide Nanostructures

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