Highly stable, fast responsive Mo2CTx MXene sensors for room temperature carbon dioxide detection

Thomas, Tijin; Ramón, Jesús Alberto Ramos; Agarwal, Vivechana; Méndez, Anabel Álvarez; Martinez, Josué Almicar Aguilar; Kumar, Yogesh; Sanal, K.C.

doi:10.1016/j.micromeso.2022.111872

Cited by 27 publications

(19 citation statements)

References 54 publications

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“…The humidity enhances the resistance of the polyflake Mo 2 CT x layer with a high SNR value which allows for the reversible detection of at least down to 10 ppm of H 2 O or 0.06% relative humidity. Moreover, Thomas et al fabricated Mo 2 CT x MXene sensors supported on different substrates (glass, crystalline, or porous silicon) for CO 2 detection at room temperature . The fabricated porous silicon/Mo 2 CT x sensor working at 30 °C and 50 ppm of CO 2 demonstrated fast response and recovery times of 30 and 45 s, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…To date, most of the experimental work on MXene-based gas sensors has focused on Ti 3 C 2 T x . However, few studies have been published that demonstrate the gas-sensing potential of Mo 2 CT x , ,,− Nb 2 CT x , , V 2 CT x , , and V 4 C 3 T x . As a result, it would be beneficial to investigate the possibility of other synthesized MXenes for gas sensing and VOC applications.…”

Section: Resultsmentioning

confidence: 99%

“…101,182 Moreover, along with the detection of VOCs, the control of humidity in atmospheric air is essential for many processes and applications. Particularly, Ti 198 The fabricated porous silicon/ Mo 2 CT x sensor working at 30 °C and 50 ppm of CO 2 demonstrated fast response and recovery times of 30 and 45 s, respectively. In addition to that, the sensing response was found to increase with the humidity, accompanied by a delayed response and recovery times.…”

Section: ■ Mxene Propertiesmentioning

confidence: 99%

“…From the reported work, MXenes-based sensors have been shown as promising candidates for food safety applications by detecting some of the quality indicators or biomarkers such as NH 3 ,,, and CO 2 . However, there are very limited reports available on the implementation of MXene-based sensors in food quality monitoring.…”

Section: Applications Of Mxene-based Gas Sensorsmentioning

confidence: 99%

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A Family of 2D-MXenes: Synthesis, Properties, and Gas Sensing Applications

et al. 2022

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Gas sensors, capable of detecting and monitoring trace amounts of gas molecules or volatile organic compounds (VOCs), are in great demand for numerous applications including diagnosing diseases through breath analysis, environmental and personal safety, food and agriculture, and other fields. The continuous emergence of new materials is one of the driving forces for the development of gas sensors. Recently, 2D materials have been gaining huge attention for gas sensing applications, owing to their superior electrical, optical, and mechanical characteristics. Especially for 2D MXenes, high specific area and their rich surface functionalities with tunable electronic structure make them compelling for sensing applications. This Review discusses the latest advancements in the 2D MXenes for gas sensing applications. It starts by briefly explaining the family of MXenes, their synthesis methods, and delamination procedures. Subsequently, it outlines the properties of MXenes. Then it describes the theoretical and experimental aspects of the MXenes-based gas sensors. Discussion is also extended to the relation between sensing performance and the structure, electronic properties, and surface chemistry. Moreover, it highlights the promising potential of these materials in the current gas sensing applications and finally it concludes with the limitations, challenges, and future prospects of 2D MXenes in gas sensing applications.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: ■ Mxene Propertiesmentioning

confidence: 99%

Section: Applications Of Mxene-based Gas Sensorsmentioning

confidence: 99%

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A Family of 2D-MXenes: Synthesis, Properties, and Gas Sensing Applications

et al. 2022

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“…These theoretical predictions lead to experimental investigations on using alkalized V 2 CT x for NO sensing [ 350 ]. Further studies supported the promise of using MXene films for the detection of various gases, including VOCs [ 351 , 352 ], H 2 [ 352 ], CO 2 [ 353 ], NO 2 [ 354 , 355 ], and H 2 S [ 356 ]. The CO 2 detection using a Mo 2 CT x -based sensor on different substrates, i.e., glass, crystalline silicon (cSi) and porous silicon (pSi), is shown in Figure 31 from [ 353 ].…”

Section: Two-dimensional-material-based Gas Sensing Filmsmentioning

confidence: 98%

Application of Two-Dimensional Materials towards CMOS-Integrated Gas Sensors

Filipovic

Selberherr

2022

Nanomaterials

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During the last few decades, the microelectronics industry has actively been investigating the potential for the functional integration of semiconductor-based devices beyond digital logic and memory, which includes RF and analog circuits, biochips, and sensors, on the same chip. In the case of gas sensor integration, it is necessary that future devices can be manufactured using a fabrication technology which is also compatible with the processes applied to digital logic transistors. This will likely involve adopting the mature complementary metal oxide semiconductor (CMOS) fabrication technique or a technique which is compatible with CMOS due to the inherent low costs, scalability, and potential for mass production that this technology provides. While chemiresistive semiconductor metal oxide (SMO) gas sensors have been the principal semiconductor-based gas sensor technology investigated in the past, resulting in their eventual commercialization, they need high-temperature operation to provide sufficient energies for the surface chemical reactions essential for the molecular detection of gases in the ambient. Therefore, the integration of a microheater in a MEMS structure is a requirement, which can be quite complex. This is, therefore, undesirable and room temperature, or at least near-room temperature, solutions are readily being investigated and sought after. Room-temperature SMO operation has been achieved using UV illumination, but this further complicates CMOS integration. Recent studies suggest that two-dimensional (2D) materials may offer a solution to this problem since they have a high likelihood for integration with sophisticated CMOS fabrication while also providing a high sensitivity towards a plethora of gases of interest, even at room temperature. This review discusses many types of promising 2D materials which show high potential for integration as channel materials for digital logic field effect transistors (FETs) as well as chemiresistive and FET-based sensing films, due to the presence of a sufficiently wide band gap. This excludes graphene from this review, while recent achievements in gas sensing with graphene oxide, reduced graphene oxide, transition metal dichalcogenides (TMDs), phosphorene, and MXenes are examined.

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Room Temperature Wearable Gas Sensors for Fabrication and Applications

Xiao

Wang

et al. 2023

Advanced Sensor Research

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The recent surge in demand for human–machine interaction (HMI), Internet of Things (IoTs), and artificial intelligence (AI) has created both opportunities and challenges for room‐temperature wearable gas sensors. These sensors serve as a source of perceptual information and can be easily integrated into wearable electronic devices due to their portability and miniaturization. In recent years, various types of wearable room temperature gas sensors have been developed for fields like environmental monitoring, healthcare, smart home, industrial security, food safety monitoring, and public security. These sensors not only adjust to the movements of human effortlessly but also have reduced power consumption. Therefore, room temperature wearable gas sensors hold great promise for the development of integrated intelligent gas sensing system worn on the human body. These sensors can be fabricated using various sensing materials to detect diverse target gases. This review provides a comprehensive summary of the preparation of sensing materials with extraordinary sensing capabilities at room temperature. Additionally, the article includes a brief discussion of the sensing mechanism, employing four models to explain it: oxygen adsorption, direct electron transfer, proton transfer, and ions conduction. Finally, this article discusses the various applications and future perspectives of room‐temperature wearable gas sensors.

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Highly stable, fast responsive Mo2CTx MXene sensors for room temperature carbon dioxide detection

Cited by 27 publications

References 54 publications

A Family of 2D-MXenes: Synthesis, Properties, and Gas Sensing Applications

A Family of 2D-MXenes: Synthesis, Properties, and Gas Sensing Applications

Application of Two-Dimensional Materials towards CMOS-Integrated Gas Sensors

Room Temperature Wearable Gas Sensors for Fabrication and Applications

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