Metal Oxide Gas Sensor Electronic Interfaces

Hijazi, Zeinab; Caviglia, Daniele D.; Valle, Maurizio

doi:10.1002/9781119587422.ch7

Cited by 2 publications

(1 citation statement)

References 49 publications

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“…However, their high cost-and complex fabrication process makes them difficult to employ as widely adopted sensors. A MOx layer on top of an interdigitated structure in the presence of gas is enhanced by a chemical adsorption of oxygen ions in the air and creates surface acceptor sites (O -, O 2-, O2 -) [78]. A heating element is implemented to catalyze these reactions at higher temperatures.…”

Section: Chemiresistive Materials Layers For Gas Sensingmentioning

confidence: 99%

Fluorinated Graphene Oxide Based Chemiresistive Gas Sensor Targeting NH3 and Other Analytes Under Atmospheric Conditions

Amor¹

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Emergence of graphene-derived highly functional materials has transformed chemical and biological sensing. Several novel approaches utilizing chemical modification of graphene oxide (GO) were investigated and implemented using these materials in sensor fabrication for the detection of chemical analytes such as volatile organic compounds (VOC). The detection methods rely on using functionalization of modified graphene derivatives to target select analytes and produce a quantifiable, distinguishable electrical response. In this work, an in-house hydrothermal fluorination technique to synthesize fluorinated-GO (FGO) suspension was developed. The FGO material was drop coated in its solution phase onto interdigitated electrodes to create a chemiresistive gas sensor. An ultra-low-level detection of NH3 (~>2.26 ppm) was observed by the chemiresistive sensor which was extended to detect acetone and distinguish between their individual transient responses.The sensor system is fully integrated and miniaturized making it suitable for point-of-care, continuous health monitoring applications in exhaled breath testing.iii Co-AuthorshipThe content of this scientific body of work has been developed at the Organic Sensors and Devices Laboratory at Carleton university in 2019-2021. This work has produced one published conference paper, and one special issue conference paper submission (in progress).These described FGO chemiresistive sensors were able to quantify and distinguish noticeable responses to changes in select gas concentration. The sensitivity, specificity, reliability, are all established with a low-cost synthesis fabrication process. The first conference paper describes a novel FGO chemiresistive sensor able to detect ammonia and acetone in ultra-low concentrations and its viability for point-of-care, non-invasive health monitoring. The second paper is in submission progress and pertains to the same work with a focus on the hybrid implementation of the sensor onto a custom printed circuit board (PCB) for data acquisition and production on flexible polymer substrates. This experimental work presented in this thesis with references A and B were in collaboration with the author, research supervisor Prof. Ravi Prakash, Dr. Siziwe Bebe and Bruno Gamero at the Organic sensors and devices laboratory (OSDL) at Carleton University. The graphene material was kindly provided by Brian Kennedy from KennedyLabs. Electrode patterning was carried out by the Carleton University nanofabrication team led by Mr. Rob Vandusen, with material deposition carried out with assistance Dr. Siziwe Bebe. Development of these deposition techniques was created and carried out by Dr. Siziwe Bebe and Prof. Ravi Prakash. The readout circuit was built by the author, and Bruno Gamero. Data analysis was then performed by the author. Custom PCB design was carried out by the author with the assistance of Mr. Nagui Mikhail.

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Section: Chemiresistive Materials Layers For Gas Sensingmentioning

confidence: 99%

Fluorinated Graphene Oxide Based Chemiresistive Gas Sensor Targeting NH3 and Other Analytes Under Atmospheric Conditions

Amor¹

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Three‐Terminal Artificial Olfactory Sensors based on Emerging Materials: Mechanism and Application

Duan

Huang

Feng

et al. 2023

Adv Funct Materials

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Over the past several years, a variety of hardware-based artificial sensory systems, including artificial skin, electronic noses, and artificial retinas, have attracted considerable research interest in advanced artificial intelligence systems. The integration of sensing and computing functions in single or multiple connected self-adaptive field-effect transistor (FET)-structured sensory devices to implement artificial olfactory systems for in-sensor computing has recently attracted increasing attention. In this review, the development status of FET-based gas sensory devices is focused on. The mechanisms of sensory FET devices, gas-recognition materials, strategies for improving sensing performance, and the integration of sensory devices into the artificial olfactory system are discussed. Finally, the further development of FET-based sensory devices for artificial olfactory systems and their great potential for next-generation intelligent sensory systems are discussed in broad fields such as environmental monitoring, health care, and military industries.

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Metal Oxide Gas Sensor Electronic Interfaces

Cited by 2 publications

References 49 publications

Fluorinated Graphene Oxide Based Chemiresistive Gas Sensor Targeting NH3 and Other Analytes Under Atmospheric Conditions

Fluorinated Graphene Oxide Based Chemiresistive Gas Sensor Targeting NH3 and Other Analytes Under Atmospheric Conditions

Three‐Terminal Artificial Olfactory Sensors based on Emerging Materials: Mechanism and Application

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