Wafer-Scale Synthesized MoS<sub>2</sub>/Porous Silicon Nanostructures for Efficient and Selective Ethanol Sensing at Room Temperature

Dwivedi, Priyanka; Das, Samaresh; Dhanekar, Saakshi

doi:10.1021/acsami.7b05468

Cited by 58 publications

(34 citation statements)

References 48 publications

(63 reference statements)

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“…Another porous structure was proposed by Dwivedi et al [ 73 ]. p -type silicon wafer was etched by electrochemical anodization to obtain a porous silicon substrate, on which metallic molybdenum was deposited on top by magnetron sputtering.…”

Section: Molybdenum Disulfide (Mos 2 ) Chemicalmentioning

confidence: 99%

Molybdenum Dichalcogenides for Environmental Chemical Sensing

Zappa

2017

Materials

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2D transition metal dichalcogenides are attracting a strong interest following the popularity of graphene and other carbon-based materials. In the field of chemical sensors, they offer some interesting features that could potentially overcome the limitation of graphene and metal oxides, such as the possibility of operating at room temperature. Molybdenum-based dichalcogenides in particular are among the most studied materials, thanks to their facile preparation techniques and promising performances. The present review summarizes the advances in the exploitation of these MoX2 materials as chemical sensors for the detection of typical environmental pollutants, such as NO2, NH3, CO and volatile organic compounds.

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Section: Molybdenum Disulfide (Mos 2 ) Chemicalmentioning

confidence: 99%

Molybdenum Dichalcogenides for Environmental Chemical Sensing

Zappa

2017

Materials

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“…Their application to gas sensor design, however, is rarely studied, and only focuses on pristine MXenes (Ti 3 C 2 T x , V 2 CT x , and Ti 2 CO 2 ) [14][15][16] . On the other hand, 2D transitionmetal dichalcogenides (TMDs) have been considered as promising sensing materials owing to their high surface-to-volume ratios, good adsorption properties, large number of active sites for redox reactions, and high surface reactivity 17,18 . Indeed, a significant number of literature reports have recently emerged regarding their integration into chemical sensors to detect various harmful gases, such as NH 3 , NO 2 , and VOCs 19 .…”

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confidence: 99%

Nanohybrids of a MXene and transition metal dichalcogenide for selective detection of volatile organic compounds

et al. 2020

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Two-dimensional transition metal carbides/nitrides, known as MXenes, have been recently receiving attention for gas sensing. However, studies on hybridization of MXenes and 2D transition metal dichalcogenides as gas-sensing materials are relatively rare at this time. Herein, Ti 3 C 2 T x and WSe 2 are selected as model materials for hybridization and implemented toward detection of various volatile organic compounds. The Ti 3 C 2 T x /WSe 2 hybrid sensor exhibits low noise level, ultrafast response/recovery times, and good flexibility for various volatile organic compounds. The sensitivity of the hybrid sensor to ethanol is improved by over 12-fold in comparison with pristine Ti 3 C 2 T x. Moreover, the hybridization process provides an effective strategy against MXene oxidation by restricting the interaction of water molecules from the edges of Ti 3 C 2 T x. An enhancement mechanism for Ti 3 C 2 T x /WSe 2 heterostructured materials is proposed for highly sensitive and selective detection of oxygencontaining volatile organic compounds. The scientific findings of this work could guide future exploration of next-generation field-deployable sensors.

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“…The device demonstrated lowest limit of detection of 10 ppb with response as high as 3518% for 50 ppm NO gas at room temperature. Dwivedi et al synthesized MoS 2 /porous‐silicon heterostructure for selective detection of ethanol at room temperature with a minimum LOD of 1 ppm 264…”

Section: Efforts To Improve Performance Of Devices Based On These Matmentioning

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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Wafer-Scale Synthesized MoS₂/Porous Silicon Nanostructures for Efficient and Selective Ethanol Sensing at Room Temperature

Cited by 58 publications

References 48 publications

Molybdenum Dichalcogenides for Environmental Chemical Sensing

Molybdenum Dichalcogenides for Environmental Chemical Sensing

Nanohybrids of a MXene and transition metal dichalcogenide for selective detection of volatile organic compounds

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

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Wafer-Scale Synthesized MoS2/Porous Silicon Nanostructures for Efficient and Selective Ethanol Sensing at Room Temperature

Cited by 58 publications

References 48 publications

Molybdenum Dichalcogenides for Environmental Chemical Sensing

Molybdenum Dichalcogenides for Environmental Chemical Sensing

Nanohybrids of a MXene and transition metal dichalcogenide for selective detection of volatile organic compounds

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

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Wafer-Scale Synthesized MoS₂/Porous Silicon Nanostructures for Efficient and Selective Ethanol Sensing at Room Temperature