A high-performance trace level acetone sensor using an indispensable V4C3Tx MXene

Zhao, Weina; Yun, Na; Dai, Zhenhua; Li, Yefei

doi:10.1039/c9ra09069j

Cited by 73 publications

(58 citation statements)

References 65 publications

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“…Recently, MXenes are considered as new chemiresistive materials with 2D structures, which are generally prepared by the exfoliation from "MAX" phase (M: Sc, Ti, Zr, Hf, V, Nb, Ta, Cr, or Mo, A: Al, Ga, In, Tl, Si, Ge, Sn, Pb, P, As, Bi, S, or Te; and X: C or N). [518][519][520] To date, Ti 3 C 2 T x , [521][522][523][524][525][526][527] [528] [529] and TiCO 2 have been explored to detect NH 3 , [521][522][523][524][525][526]530] C 2 H 5 OH, [523] CH 3 OH, [523] NO 2 , [527] H 2 , [528] and acetone. [529] Similar to other 2D chemiresistors such as graphenes, rGOs, and TMDs, the MXene-based sensor also offers operation at low temperature [521][522][523][524][525][526][527][528][529][530] and flexible design.…”

Section: D Early-transition Metal Carbides and Nitridesmentioning

confidence: 99%

Rational Design of Semiconductor‐Based Chemiresistors and their Libraries for Next‐Generation Artificial Olfaction

2020

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With rapid progress in device integration and computing power, the realization of highly miniaturized one-chip artificial olfaction with superior performance is close and should be further supported by the rational design of chemical sensors and chemical sensing materials. The number of gas sensors tends to increase in order to sniff more complex odors with the progress of civilization. This explains the evolution from a single chemical sensor to complicated artificial olfaction using sensor arrays. At the advent of oxide chemiresistive gas sensors in the 1960s and 1970s, a single gas sensor was widely used to detect toxic, explosive, dangerous, and harmful gases, such as CO, C 3 H 8 , CH 4 , H 2 S, and NO 2 , in a selective manner. [26,27] However, a single sensor is often insufficient for recognizing most of the natural odors encountered in daily life, which consist of hundreds to thousands of different chemicals. [28] In the mammalian olfactory system, odorants are initially detected by olfactory receptors (ORs) covering the surface of the cilia projected from olfactory sensory neurons (OSNs), which are located in the olfactory epithelium lining the nasal cavity. These signals are transmitted to the glomeruli in the olfactory bulb, where a high degree of signal integration happens (Figure 1a). [29] Finally, the signals are sent through mitral cells to a higher brain region (olfactory cortex), and the signals are subsequently combined or modified in a variety of ways by parallel processing for analysis and interpretation (Figure 1b). [30] Each OR can detect various kinds of odorants, and similarly, each odorant can also be recognized by a number of ORs. That is, the olfactory system determines multiple odorants from various combinations of ORs (Figure 1c). [31] For better olfaction, both OSNs and ORs should be abundant. A larger number of OSNs is advantageous for detecting trace concentrations of analytes and ligands. [32] For instance, dogs with more OSNs are better than humans at detecting explosives, searching and rescuing, diagnosing disease, and assessing agricultural products. [33] If a mammal can detect larger numbers of faint gas components within odors, he can perceive and identify the odors more accurately. From this perspective, gas sensors with lower detection limits would be assembled to the stronger artificial olfaction. Kinds of ORs are also important. Mammals are known to have ≈1000 different kinds of ORs, and combinations of dissimilar ORs enable the discrimination of a myriad of odorants. [29] To mimic this, sensor arrays consisting of small number (5-20) of sensors that show Artificial olfaction based on gas sensor arrays aims to substitute for, support, and surpass human olfaction. Like mammalian olfaction, a larger number of sensors and more signal processing are crucial for strengthening artificial olfaction. Due to rapid progress in computing capabilities and machinelearning algorithms, on-demand high-performance artificial olfaction that can eclipse human olfaction becomes inevitable onc...

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Section: D Early-transition Metal Carbides and Nitridesmentioning

confidence: 99%

Rational Design of Semiconductor‐Based Chemiresistors and their Libraries for Next‐Generation Artificial Olfaction

2020

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Section: D Mxene Composite Sensors For Multifunctional Sensorsmentioning

confidence: 99%

“…The obtained V 4 C 3 T x sensor triumphantly met the requirement of high selectivity to mixed gases, low detection limits (ultralow concentrated of 1 ppm) at a low temperature of 25 °C. [ 161 ] In this study, the experiment results combined with theoretical research provide a powerful theoretical basis in further design and production of gas sensor.…”

Section: D Mxene Composite Sensors For Multifunctional Sensorsmentioning

confidence: 99%

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Recent Advances in Multidimensional (1D, 2D, and 3D) Composite Sensors Derived from MXene: Synthesis, Structure, Application, and Perspective

et al. 2021

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Moreover, a study from the World Health Organization (WHO) emphasized that death due to heart diseases and diabetes is still an upward trend and expected to be the first and seventh leading causes of death, respectively, by 2030. [16] Therefore, early diagnosis and treatment is urgently on demand. [12,17] A variety of human health-detection devices, intelligent wearable devices, and medical intelligent devices as efficient strategies have been emerging and making a big difference in daily life, [18][19][20][21][22][23] making it higher efficient, more accurate, more timely than traditional detection techniquesIn the meanwhile, sensors, as a vital component in intelligent detection devices quickly bloom to meet the requirement of high sensitivity, wide detection range, and stable response sensing capability. Sensors work through transforming external stimulus including biological, chemical, and physical changes into electrical signals changes. According to their respective work mechanism, sensors can be classified into the following several categories: piezoresistive, [24][25][26] piezoelectric, [27][28][29] frictional, [30] and capacitive. [31][32][33][34] Among them, piezoresistive sensors have attracted extensive concern for its simple structure, low cost, and easy signal acquisition, further being applied to the field of wearable detection devices. [35,36] It works by transforming external stimulus into visual electrical signals, and the change of resistance is generated by microscopic deformations of its own structure. [37][38][39][40] From sensors functional point of view, sensors can also be divided into strain sensors, [39,[41][42][43][44] stress sensors, [45,46] humidity sensors, [47] gas sensors, [41,48,49] temperature sensors, [50] and so on. On the present overall view, the key issue focuses on how to realize ideal sensors compatible with high sensitivity, wide detection range, ultralow response time, ultralow detection limitation, superb linearity, and cyclic stability. [51][52][53][54][55][56][57][58][59][60] What is noteworthy is that conductive materials interacting with other substances have been considered as an extremely efficient strategy to realize high sensing performance, being able to give out fast response reacting to outer tiny changes. Currently, aiming to endow sensors superb sensitivity and wide sensing range, flexible substrates for sensors commonly choose polydimethylsiloxane (PDMS), hydrogenated styrene-butadiene block copolymer (SEBS), and silicone rubber and other high elastic polymer materials. [37,57,61,62] Then, the composite sensor is fabricated successfully by different preparation techniques including With the advent of the era of intelligent manufacturing, sensors, with various detection objects, have set off a wave of enthusiasm and reached new heights in medical treatment, intelligent industry, daily life, and so on. MXene, as an emerging family of 2D transition metal carbides/nitrides, possesses impressive electrical conductivity, outstanding structural controllability, ...

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“…For example, Yang et al prepared CNT-rGO aerogels reduced by ascorbic acid. 15 The graphene aerogels demonstrated good electrical behaviour, but their mechanical properties are not good because the residual ascorbic acid restrict the recovery of aerogels. In addition, we soaked the hydrogel in an ethanol solution with a proper concentration before freeze drying, the mechanical strength of the graphene aerogel was enhanced greatly because the low freezing point of ethanol solution, which effectively retarded its freezing and then kept the porous structure undestroyed.…”

Section: Introductionmentioning

confidence: 99%

A highly sensitive piezoresistive sensor based on CNT-rGO aerogel for human motion detection

Zhu

Dai

Zhou

et al. 2021

Journal of Composite Materials

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In recent years, Flexible sensors have emerged as a highly active field due to their promising applications in artificial intelligence systems and wearable health care devices. However, achieving a high sensitivity in a wide pressure range is still a challenge. Here, a three-dimensional network structure CNT-rGO aerogels were prepared by a hydrothermal redox method, which can effectively enhance the mechanical strength and enrich the electrical conductivity paths. Moreover, the CNT–rGO aerogel-based piezoresistive sensor exhibited a fast response time (∼300 ms), wide working range (0∼3.5 kPa−1), high sensitivity (11.8 kPa−1), and good stability (∼2000 cycles). So the piezoresistive sensor can be employed to monitor and distinguish both large motions (e.g., weight placed on the aerogel) and subtle motions (e.g., pronounce and pulse), which shows potential applications in measuring pressure distribution, distinguishing tiny stress changes, and monitoring human body motion.

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A high-performance trace level acetone sensor using an indispensable V₄C₃T_x MXene

Abstract: A high-performance acetone sensor utilizing an emerging indispensable V4C3Tx MXene is described via combining experimental results with theoretical study.

Cited by 73 publications

References 65 publications

Rational Design of Semiconductor‐Based Chemiresistors and their Libraries for Next‐Generation Artificial Olfaction

Rational Design of Semiconductor‐Based Chemiresistors and their Libraries for Next‐Generation Artificial Olfaction

Recent Advances in Multidimensional (1D, 2D, and 3D) Composite Sensors Derived from MXene: Synthesis, Structure, Application, and Perspective

A highly sensitive piezoresistive sensor based on CNT-rGO aerogel for human motion detection

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