Aza-crown-ether functionalized graphene oxide for gas sensing and cation trapping applications

Valt, Matteo; Fabbri, Barbara; Gaiardo, Andrea; Gherardi, S.; Casotti, Davide; Cruciani, Giuseppe; Pepponi, G.; Vanzetti, L.; Iacob, Erica; Malagù, C.; Bellutti, P.; Guidi, V.

doi:10.1088/2053-1591/ab11fb

Cited by 17 publications

(16 citation statements)

References 49 publications

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“…In particular, specifically calibrated arrays of MOX gas sensors equipped with a dedicated algorithm have proven to be suitable for different applications [ 11 ]. On the other hand, great effort has been devoted to the study and development of advanced nanostructured sensing materials, by considering both MOX and other types of semiconductors [ 7 , 12 , 13 , 14 , 15 ]. The most used techniques were based on the addition of catalysts to the MOX nanostructure surface, on the synthesis of different MOX morphologies and on the preparation of MOX solid solutions [ 6 , 7 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

Nanostructured SmFeO3 Gas Sensors: Investigation of the Gas Sensing Performance Reproducibility for Colorectal Cancer Screening

Gaiardo

Zonta

Gherardi

et al. 2020

Sensors

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Among the various chemoresistive gas sensing properties studied so far, the sensing response reproducibility, i.e., the capability to reproduce a device with the same sensing performance, has been poorly investigated. However, the reproducibility of the gas sensing performance is of fundamental importance for the employment of these devices in on-field applications, and to demonstrate the reliability of the process development. This sensor property became crucial for the preparation of medical diagnostic tools, in which the use of specific chemoresistive gas sensors along with a dedicated algorithm can be used for screening diseases. In this work, the reproducibility of SmFeO3 perovskite-based gas sensors has been investigated. A set of four SmFeO3 devices, obtained from the same screen-printing deposition, have been tested in laboratory with both controlled concentrations of CO and biological fecal samples. The fecal samples tested were employed in the clinical validation protocol of a prototype for non-invasive colorectal cancer prescreening. Sensors showed a high reproducibility degree, with an error lower than 2% of the response value for the test with CO and lower than 6% for fecal samples. Finally, the reproducibility of the SmFeO3 sensor response and recovery times for fecal samples was also evaluated.

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Section: Introductionmentioning

confidence: 99%

Nanostructured SmFeO3 Gas Sensors: Investigation of the Gas Sensing Performance Reproducibility for Colorectal Cancer Screening

Gaiardo

Zonta

Gherardi

et al. 2020

Sensors

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“…The market for gaseous sensors is continuously growing. There is a significant demand for small, low-cost and high-performance gas sensors in several sectors, including chemical process control, precision agriculture, environmental monitoring, and medical applications [1][2][3][4][5]. Among the various new classes of smart gas detectors, one of the most investigated and used are the chemoresistive gas sensors, which show high sensitivity, allowing to detect low concentrations of gases (ppm-ppb range) with high accuracy [6][7][8][9].…”

Section: Discussionmentioning

confidence: 99%

Dataset of the Optimization of a Low Power Chemoresistive Gas Sensor: Predictive Thermal Modelling and Mechanical Failure Analysis

Gaiardo

Novel

Scattolo

et al. 2021

Data

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Over the last few years, employment of the standard silicon microfabrication techniques for the gas sensor technology has allowed for the development of ever-small, low-cost, and low-power consumption devices. Specifically, the development of silicon microheaters (MHs) has become well established to produce MOS gas sensors. Therefore, the development of predictive models that help to define a priori the optimal design and layout of the device have become crucial, in order to achieve both low power consumption and high mechanical stability. In this research dataset, we present the experimental data collected to develop a specific and useful predictive thermal-mechanical model for high performing silicon MHs. To this aim, three MH layouts over three different membrane sizes were developed by using the standard silicon microfabrication process. Thermal and mechanical performances of the produced devices were experimentally evaluated, by using probe stations and mechanical failure analysis, respectively. The measured thermal curves were used to develop the predictive thermal model towards low power consumption. Moreover, a statistical analysis was finally introduced to cross-correlate the mechanical failure results and the thermal predictive model, aiming at MH design optimization for gas sensing applications. All the data collected in this investigation are shown.

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“…54 The peaks at 1113.2 cm À1 and 1580 cm À1 might be attributed to C]C and C]O stretching. A peak at 1360 cm À1 was also observed, corresponding to C-N stretching vibrations, 28 and a peak with a small uctuation at 1709 cm À1 belonged to O]C-OH. 55 Aer adsorption, a new peak appeared at 625.89 cm À1 , which was due to the addition of Tl-O, indicating that the hydrogen ion exchange between Tl(I) and oxygen-containing functional groups on the surface of FGO may also promote the removal of Tl(I).…”

Section: Tl(i) Removal Mechanismsmentioning

confidence: 98%

“…In this reaction mechanism, TBAOH is a deprotonated nucleophile, which increases the nucleophilicity of GO and thus the rate of nucleophilic substitution. 28 The mixture was transferred into a sealed Teon autoclave (100 mL), reacted at 100 C for 24 h and thermalized to room temperature. The reaction mixture was washed with deionized water, and aer ultrasonic treatment, the solids were suspended on a nylon membrane (0.22 mm pore diameter) and ltered.…”

Section: Preparation Of Fgomentioning

confidence: 99%

“…New oxygen-rich properties 27 and mechanical properties 28 can be introduced into GO coordinated to azacrown ethers. In particular, Valt et al (2019) reported that FGO adsorbs Cr(III), Cu(II), Ni(II) well, but its ability to remove Tl is still unclear. Therefore, the synthesis of FGO with the ability to remove Tl from wastewater is signicant in the search for new approaches to cleanup Tl-contaminated wastewater.…”

Section: Introductionmentioning

confidence: 99%

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Extensive removal of thallium by graphene oxide functionalized with aza-crown ether

et al. 2020

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Aza-crown-ether functionalized graphene oxide for gas sensing and cation trapping applications

Cited by 17 publications

References 49 publications

Nanostructured SmFeO3 Gas Sensors: Investigation of the Gas Sensing Performance Reproducibility for Colorectal Cancer Screening

Nanostructured SmFeO3 Gas Sensors: Investigation of the Gas Sensing Performance Reproducibility for Colorectal Cancer Screening

Dataset of the Optimization of a Low Power Chemoresistive Gas Sensor: Predictive Thermal Modelling and Mechanical Failure Analysis

Extensive removal of thallium by graphene oxide functionalized with aza-crown ether

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