Improvement of NO<sub>2</sub> Detection: Graphene Decorated With ZnO Nanoparticles

Alfano, Brigida; Miglietta, Maria Lucia; Polichetti, T.; Massera, Ettore; Bruno, Alfonsina; Francia, G. Di; Veneri, P. Delli

doi:10.1109/jsen.2019.2922412

Cited by 8 publications

(6 citation statements)

References 38 publications

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“…Alfano et al [84] developed a sensitive material in which graphene was created by exfoliating graphite in its liquid phase, and then followed by microwave functionalization with ZnO. In comparison to equivalent devices made of bare graphene, chemiresistor devices made of hybrid materials showed that adding ZnO NPs to the graphene matrix can increase the sensing platform by increasing the sensing response and enhancing the selectivity.…”

Section: Synthesis Of Graphene-based Inorganic Nanostructured Compositesmentioning

confidence: 99%

The Synergistic Properties and Gas Sensing Performance of Functionalized Graphene-Based Sensors

2022

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The detection of toxic gases has long been a priority in industrial manufacturing, environmental monitoring, medical diagnosis, and national defense. The importance of gas sensing is not only of high benefit to such industries but also to the daily lives of people. Graphene-based gas sensors have elicited a lot of interest recently, due to the excellent physical properties of graphene and its derivatives, such as graphene oxide (GO) and reduced graphene oxide (rGO). Graphene oxide and rGO have been shown to offer large surface areas that extend their active sites for adsorbing gas molecules, thereby improving the sensitivity of the sensor. There are several literature reports on the promising functionalization of GO and rGO surfaces with metal oxide, for enhanced performance with regard to selectivity and sensitivity in gas sensing. These synthetic and functionalization methods provide the ideal combination/s required for enhanced gas sensors. In this review, the functionalization of graphene, synthesis of heterostructured nanohybrids, and the assessment of their collaborative performance towards gas-sensing applications are discussed.

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Section: Synthesis Of Graphene-based Inorganic Nanostructured Compositesmentioning

confidence: 99%

The Synergistic Properties and Gas Sensing Performance of Functionalized Graphene-Based Sensors

2022

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“…This platform support both analog and digital sensors, developed by Convergence project partners, such as activity [ 4 , 11 ], sweat and pH [ 14 ] and gas sensors like NO x [ 15 , 16 ], CO x [ 7 ], NH x compounds.…”

Section: Low-power Wearable Sensing Platform: Architecture Specifmentioning

confidence: 99%

“…The ink-jet printing method offers the advantage of precise deposition on small surfaces, and the possibility to adjust the printing parameters such as droplet volume, droplet distance, and the number of layers. For each sensor, a different material was developed taking into consideration the affinity (documented in previous work) [ 7 , 16 ] of the material with the targeted gas.…”

Section: Sensors Characteristicsmentioning

confidence: 99%

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A Wearable Low-Power Sensing Platform for Environmental and Health Monitoring: The Convergence Project

Saoutieff

Polichetti

Jouanet

et al. 2021

Sensors

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The low-power sensing platform proposed by the Convergence project is foreseen as a wireless, low-power and multifunctional wearable system empowered by energy-efficient technologies. This will allow meeting the strict demands of life-style and healthcare applications in terms of autonomy for quasi-continuous collection of data for early-detection strategies. The system is compatible with different kinds of sensors, able to monitor not only health indicators of individual person (physical activity, core body temperature and biomarkers) but also the environment with chemical composition of the ambient air (NOx, COx, NHx particles) returning meaningful information on his/her exposure to dangerous (safety) or pollutant agents. In this article, we introduce the specifications and the design of the low-power sensing platform and the different sensors developed in the project, with a particular focus on pollutant sensing capabilities and specifically on NO2 sensor based on graphene and CO sensor based on polyaniline ink.

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“…Besides, tin oxide remains an essential material in the manufacture of resistive sensors. The use of graphene as a dopant in this type of sensor improves its electrical properties and increases the chemical sensitivity to different compounds [ 7 , 8 ].…”

Section: Introductionmentioning

confidence: 99%

Graphene-Doped Tin Oxide Nanofibers and Nanoribbons as Gas Sensors to Detect Biomarkers of Different Diseases through the Breath

Sánchez-Vicente

Santos

Lozano

et al. 2020

Sensors

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This work presents the development of tin oxide nanofibers (NFs) and nanoribbons (NRs) sensors with graphene as a dopant for the detection of volatile organic compounds (VOCs) corresponding to different chronic diseases (asthma, chronic obstructive pulmonary disease, cystic fibrosis or diabetes). This research aims to determine the ability of these sensors to differentiate between gas samples corresponding to healthy people and patients with a disease. The nanostructures were grown by electrospinning and deposited on silicon substrates with micro-heaters integrated. The morphology of NFs and NRs was characterized by Scanning Electron Microscopy (SEM). A gas line was assembled and programmed to measure a wide range of gases (ethanol, acetone, NO and CO) at different concentrations simulating human breath conditions. Measurements were made in the presence and absence of humidity to evaluate its effect. The sensors were able to differentiate between the concentrations corresponding to a healthy person and a patient with one of the selected diseases. These were sensitive to biomarkers such as acetone and ethanol at low operating temperatures (with responses above 35%). Furthermore, CO and NO response was at high temperatures (above 5%). The sensors had a rapid response, with times of 50 s and recovery periods of about 10 min.

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Improvement of NO₂ Detection: Graphene Decorated With ZnO Nanoparticles

Cited by 8 publications

References 38 publications

The Synergistic Properties and Gas Sensing Performance of Functionalized Graphene-Based Sensors

The Synergistic Properties and Gas Sensing Performance of Functionalized Graphene-Based Sensors

A Wearable Low-Power Sensing Platform for Environmental and Health Monitoring: The Convergence Project

Graphene-Doped Tin Oxide Nanofibers and Nanoribbons as Gas Sensors to Detect Biomarkers of Different Diseases through the Breath

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Improvement of NO2 Detection: Graphene Decorated With ZnO Nanoparticles

Cited by 8 publications

References 38 publications

The Synergistic Properties and Gas Sensing Performance of Functionalized Graphene-Based Sensors

The Synergistic Properties and Gas Sensing Performance of Functionalized Graphene-Based Sensors

A Wearable Low-Power Sensing Platform for Environmental and Health Monitoring: The Convergence Project

Graphene-Doped Tin Oxide Nanofibers and Nanoribbons as Gas Sensors to Detect Biomarkers of Different Diseases through the Breath

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Improvement of NO₂ Detection: Graphene Decorated With ZnO Nanoparticles