Hybrid nanomaterials designed for volatile organic compounds sensors: A review

André, Rafaela S.; Sanfelice, Rafaela C.; Pavinatto, Adriana; Mattoso, Luiz H. C.; Corrêa, Daniel S.

doi:10.1016/j.matdes.2018.06.041

Cited by 146 publications

(74 citation statements)

References 146 publications

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“…To meet those requirements, many types of gas sensors with different transduction forms, e.g., chemi-resistor, field-effect transistor (FET), solid-state electrochemical sensor (SSES), quartz-crystal microbalance (QCM), gas capacitor, surface acoustic wave (SAW), have been well studied and developed. Among them, since the 1960s [7], a chemi-resistor that contains an active sensing layer bridging a pair of electrodes became a promising candidate due to its advantages [4][5][6][8][9][10][11][12] including easy-tofabricate, use of very small quantity (milligram level) active materials, wide adoption of sensitive materials, and simple sensing data, which ensure its success in certain commercialization opportunities [13][14][15]. However, it is rare to find chemi-resistors that can meet these specific requirements.…”

Section: Introductionmentioning

confidence: 99%

Gas Sensors Based on Chemi-Resistive Hybrid Functional Nanomaterials

et al. 2020

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HIGHLIGHTS• This review gives a thinking based on the generic mechanisms rather than simply dividing them as different types of combination of materials, which is unique and valuable for understanding and developing the novel hybrid materials in the future.• The hybrid materials, their sensing mechanism, and their applications are systematically reviewed. Critical thinking and ideas regarding the orientation of the development of hybrid material-based gas sensor in the future are also discussed.ABSTRACT Chemi-resistive sensors based on hybrid functional materials are promising candidates for gas sensing with high responsivity, good selectivity, fast response/recovery, great stability/repeatability, room-working temperature, low cost, and easy-to-fabricate, for versatile applications. This progress report reviews the advantages and advances of these sensing structures compared with the single constituent, according to five main sensing forms: manipulating/constructing heterojunctions, catalytic reaction, charge transfer, charge carrier transport, molecular binding/sieving, and their combinations. Promises and challenges of the advances of each form are presented and discussed.Critical thinking and ideas regarding the orientation of the development of hybrid material-based gas sensor in the future are discussed.

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Section: Introductionmentioning

confidence: 99%

Gas Sensors Based on Chemi-Resistive Hybrid Functional Nanomaterials

et al. 2020

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“…Compared to other sensing materials, MOS offers great stability, durability, and high sensitivity to small concentration of analytes (< ppm levels). In order to achieve greater sensitivities (< ppb levels), MOS are generally decorated with metal particles or other compounds, such as polymers, to conform hybrid composites [ 122 ]. Moreover, many reported cases state that the sensitivity and performance of MOS can be tuned by controlling several parameters, such as their composition, shape, morphology, doping levels, surface area, humidity, and operating temperature [ 123 ].…”

Section: Gas Sensors For Vocs Detectionmentioning

confidence: 99%

Advancements in Microfabricated Gas Sensors and Microanalytical Tools for the Sensitive and Selective Detection of Odors

Ollé

Farré-Lladós

Casals‐Terré

2020

Sensors

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In recent years, advancements in micromachining techniques and nanomaterials have enabled the fabrication of highly sensitive devices for the detection of odorous species. Recent efforts done in the miniaturization of gas sensors have contributed to obtain increasingly compact and portable devices. Besides, the implementation of new nanomaterials in the active layer of these devices is helping to optimize their performance and increase their sensitivity close to humans’ olfactory system. Nonetheless, a common concern of general-purpose gas sensors is their lack of selectivity towards multiple analytes. In recent years, advancements in microfabrication techniques and microfluidics have contributed to create new microanalytical tools, which represent a very good alternative to conventional analytical devices and sensor-array systems for the selective detection of odors. Hence, this paper presents a general overview of the recent advancements in microfabricated gas sensors and microanalytical devices for the sensitive and selective detection of volatile organic compounds (VOCs). The working principle of these devices, design requirements, implementation techniques, and the key parameters to optimize their performance are evaluated in this paper. The authors of this work intend to show the potential of combining both solutions in the creation of highly compact, low-cost, and easy-to-deploy platforms for odor monitoring.

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“…Numerous volatile organic compounds (VOCs) are known: various kinds of organic chemical gases and ingredients in a large number of industrial products, such as fuel, paints, cosmetics, composite wood, and even some ordinary exhaust fumes, like cooking, smoking, and wood-burning. With the VOC feature of simple evaporation at room temperature, human health can easily be affected through breathing or skin contact [1][2][3]. Therefore, sensing VOC vapors at low concentration is extremely important and necessary for health protection [4,5].…”

Section: Introductionmentioning

confidence: 99%

Highly-Sensitive Detection of Volatile Organic Compound Vapors by Electrospun PANI/P3TI/PMMA Fibers

Lin

et al. 2020

Polymers

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Detection of volatile organic compounds (VOCs) is one of the essential concerns for human health protection and environmental monitoring. In this study, the blending fibers using a donor-acceptor copolymer were fabricated by electrospinning technique and subsequent UV/ozone treatment. The donor-acceptor polymers were polyaniline, P3TI, and poly(methyl methacrylate) (PANI/P3TI/PMMA) fibers with a cylindrical structure and uniform morphology. VOCs were directly adsorbed by the copolymer materials assembled onto a glass surface or metal framework scaffold. Under optimal conditions, the PANI/P3TI/PMMA fibers exhibit rapid response and high selectivity to VOC vapors within 30 min of UV/ozone treatment. Additionally, the optical transmittance changes of the freestanding fibers show significant improvement of more than 10 times to those fibers on glass substrates. It is speculated that the presence of P3TI leads to the formation of a heterojunction and increases the electron reception behavior. The modification of the electronic structure as exposed to VOC vapors tend to significantly alter the optical absorbance of the fibers, leading to the excellent sensing at low VOC concentration.

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Hybrid nanomaterials designed for volatile organic compounds sensors: A review

Cited by 146 publications

References 146 publications

Gas Sensors Based on Chemi-Resistive Hybrid Functional Nanomaterials

Gas Sensors Based on Chemi-Resistive Hybrid Functional Nanomaterials

Advancements in Microfabricated Gas Sensors and Microanalytical Tools for the Sensitive and Selective Detection of Odors

Highly-Sensitive Detection of Volatile Organic Compound Vapors by Electrospun PANI/P3TI/PMMA Fibers

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