Development of Tin Oxide-Based Nanosensors for Electronic Nose Environmental Applications

Sayago, I.; Aleixandre, M.; Santos, J.P.

doi:10.3390/bios9010021

Cited by 31 publications

(19 citation statements)

References 27 publications

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“…At relatively lower operating temperature, the SnO 2 nanotubes demonstrate high delicacy and discrimination for acetone detection, when compared with other reported SnO 2 -based sensing materials [ 60 ]. SnO 2 nanofibers, when used as nanosensors in electronic noses, have shown higher sensitivity to NO 2 when the temperature was low [ 61 ]. The temperature-dependent response of PdO showed good sensitivity to various CO concentrations at operating temperatures from 25 °C to 100 °C, because the amount of adsorption of CO varies with temperature [ 62 ].…”

Section: Resultsmentioning

confidence: 99%

Palladium-Doped Tin Oxide Nanosensor for the Detection of the Air Pollutant Carbon Monoxide Gas

Jebakumar

Juliet

2020

Sensors

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The exhaust gases from various sources cause air pollution, which is a leading contributor to the global disease burden. Hence, it has become vital to monitor and control the increasing pollutants coming out of the various sources into the environment. This paper has designed and developed a sensor material to determine the amount of carbon monoxide (CO), which is one of the major primary air pollutants produced by human activity. Nanoparticle-based sensors have several benefits in sensitivity and specificity over sensors made from traditional materials. In this study, tin oxide (SnO2), which has greater sensitivity to the target gas, is selected as the sensing material which selectively senses only CO. Tin oxide nanoparticles have been synthesized from stannous chloride dihydrate chemical compound by chemical precipitation method. Palladium, at the concentration of 0.1%, 0.2%, and 0.3% by weight, was added to tin oxide and the results were compared. Synthesized samples were characterized by X-ray diffraction (XRD) and field emission scanning electron microscope (FESEM) techniques. XRD revealed the tetragonal structure of the SnO2 nanoparticles and FESEM analysis showed the size of the nanoparticles to be about 7–20 nm. Further, the real-time sensor testing was performed and the results proved that the tin oxide sensor, doped with 0.2% palladium, senses the CO gas more efficiently with greater sensitivity.

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Section: Resultsmentioning

confidence: 99%

Palladium-Doped Tin Oxide Nanosensor for the Detection of the Air Pollutant Carbon Monoxide Gas

Jebakumar

Juliet

2020

Sensors

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“…In particular, metal-oxide sensors have poor long-term stability and their employment in commercial applications is impractical due to this issue [249] . A successful study was conducted in [249] to decrease the drift and improve the stability of metal-oxide sensors. The proposed method was based on baseline manipulation alongside orthogonal signal correction and PLSR.…”

Section: Sensor Stabilitymentioning

confidence: 99%

Electronic Nose and Its Applications: A Survey

Karakaya

Ulucan

Türkan

2019

Int. J. Autom. Comput.

267

152

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In the last two decades, improvements in materials, sensors and machine learning technologies have led to a rapid extension of electronic nose (EN) related research topics with diverse applications. The food and beverage industry, agriculture and forestry, medicine and health-care, indoor and outdoor monitoring, military and civilian security systems are the leading fields which take great advantage from the rapidity, stability, portability and compactness of ENs. Although the EN technology provides numerous benefits, further enhancements in both hardware and software components are necessary for utilizing ENs in practice. This paper provides an extensive survey of the EN technology and its wide range of application fields, through a comprehensive analysis of algorithms proposed in the literature, while exploiting related domains with possible future suggestions for this research topic.

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“…Among these parameters, MOS structures with large surface areas and small volumes have shown significant improvements in the detection of VOCs. Within this context, recent advancements in fabrication methods have enabled to deploy MOS nanocomposites and thin films of just a few nanometers thick (i.e., 1D and 2D structures), which have contributed to obtain increasingly sensitive, fast, and compact devices for odor monitoring [ 124 ]. Metal oxide nanostructures in the form of nanofibers, nanorods, or nanotubes are gaining a lot of attention in recent years, due to their unique properties and morphology.…”

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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Development of Tin Oxide-Based Nanosensors for Electronic Nose Environmental Applications

Cited by 31 publications

References 27 publications

Palladium-Doped Tin Oxide Nanosensor for the Detection of the Air Pollutant Carbon Monoxide Gas

Palladium-Doped Tin Oxide Nanosensor for the Detection of the Air Pollutant Carbon Monoxide Gas

Electronic Nose and Its Applications: A Survey

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

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