Quantitative evaluation of the responses of a gravimetric gas sensor based on mesoporous functionalized silica: Application to 2,4-DNT and TNT detection

Khanniche, Sarah; Mathieu, Didier; Pereira, Franck; Frénois, Céline; Colin, Delphine; Barthet, Christelle; Hairault, Lionel

doi:10.1016/j.snb.2017.03.137

Cited by 18 publications

(8 citation statements)

References 23 publications

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“…The MST was covered by hollow ball-like indium oxide and enabled 2.1 Hz/ppmv sensitivity and an LDL below 5 ppmv. The vapors of explosive nitroaromatic compounds 2,4-dinitrotoluene (2,4-DNT) and trinitrotoluene (TNT) were specifically recognized by TSMRs coated with methylated mesoporous silica [437]. This approach was already addressed in "Unconventional theoretical and numerical approaches to sensor data analysis" above.…”

Section: Overview Of the Target Analytes Detected By Ggssmentioning

confidence: 99%

“…20 b). A molecular dynamics approach was successfully used by Khanniche et al to fit the output of a TSMR covered with methylated mesoporous silica in interaction with vapors of the nitroaromatic compounds 2,4-dinitrotoluene (2,4-DNT) and trinitrotoluene (TNT) [ 437 ]. A humidity correction was performed so that the simulations agreed with the experimental data.…”

Section: Evaluating the Performance Of The Gas Sensors And Sensor Arrmentioning

confidence: 99%

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Gas sensors based on mass-sensitive transducers. Part 2: Improving the sensors towards practical application

Oprea

2020

Anal Bioanal Chem

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Section: Overview Of the Target Analytes Detected By Ggssmentioning

confidence: 99%

Section: Evaluating the Performance Of The Gas Sensors And Sensor Arrmentioning

confidence: 99%

Gas sensors based on mass-sensitive transducers. Part 2: Improving the sensors towards practical application

Oprea

2020

Anal Bioanal Chem

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“…Silicon dioxide, oftentimes referred to as silica, is ubiquitously found in nature and finds use in a wide variety of technological applications ranging from semiconductor electronics to heterogeneous catalysis. − For many of these applications, surface and interface properties play an important role, which renders their understanding at the atomic level crucial. The surface properties of oxides in general and silicon dioxide in particular are altered by the interaction with their environments.…”

Section: Introductionmentioning

confidence: 99%

Electron-Stimulated Hydroxylation of Silica Bilayer Films Grown on Ru(0001): A Combined HREELS and EPR Study

et al. 2022

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Electron-assisted hydroxylation of single-crystalline silica bilayer films grown on Ru(0001) is studied by high-resolution electron energy loss spectroscopy (HREELS) and electron paramagnetic resonance (EPR) spectroscopy. The HREELS results reveal the formation of several hydroxyl species whose number and speciation depend on the defect structure of the film. For incomplete bilayer films, which exhibit nanometer-sized holes in the bilayer, the level of hydroxylation is significantly larger than for complete films. HREEL spectra taken in off-specular geometry provide evidence for the presence of hydroxyl groups with a transition dipole moment almost parallel to the surface for complete and incomplete bilayer films. Hydroxylation with isotopically labeled water (H2 18O) reveals a clear difference between the two casesOH species on the incomplete film almost exclusively contain oxygen from water, while the more ideal film exhibits OH groups with oxygen atoms stemming from both water and the silica film. These observations not only indicate that the degree of hydroxylation is significantly enhanced for the incomplete film but also that the reaction mechanism for hydroxylation at defect sites of this film is different. To gain insight into the reaction mechanism of electron-assisted hydroxylation, in situ EPR spectroscopy of electron-bombarded adsorbed ice layers was combined with infrared (IR) spectroscopy and mass spectrometry. We show that the electron bombardment removes a significant part of the water layer and produces different reactive paramagnetic species, namely, O2D, D, and solvated electrons, which may be trapped at low temperatures. The interaction of the silica film with such species may lead to splitting Si–O bonds even for covalently saturated silica structures as found in the ideal bilayer film and thus provide insight into possible reaction mechanisms.

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“…Real-time detection of trace gaseous molecules is increasingly in demand in various fields such as industrial production, medical diagnosis, environmental monitoring and antiterrorism. (1)(2)(3)(4)(5) In many cases, detection faces formidable challenges because of the low concentration of the target analyte, on-site real-time detection and environmental disturbances. However, most of the commercial analytical devices, such as the gas chromatography-mass spectrometer (GC-MS) are rather expensive, bulky, time-consuming and labor-intensive.…”

Section: Introductionmentioning

confidence: 99%

Gas Sensing System Composed of IC-Foundry-Compatible Microcantilever, Advanced Sensing Material, and Intelligent Signal Processing

2018

Sensors and Materials

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Gas sensors based on resonant microcantilevers have drawn significant attention in the application of trace molecule detection. In order to realize the practical application of microcantilever-based sensors, three critical points still must be addressed: inexpensive and batch-fabricated microcantilevers, high-performance sensing material and easily operated signal-processing circuit with intelligent software. Herein, a gas sensing system with a multiand-interdisciplinary collaboration mode is proposed. A low-cost and IC-foundry-compatible fabrication technology of the resonant microcantilever is developed. For the example of trace aniline detection, a scalable metal-organic-framework (MOF) material of MOF-5 with ultrahigh surface area and abundant specific aniline-adsorption sites is prepared. For sensing signal processing, an interface circuit with intelligent data processing capability is designed. Composed of the low-cost microcantilever, the advanced MOF-5 sensing material, and the intelligent signal process, the new gas sensing system shows satisfactory performance for trace aniline vapor detection.

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Quantitative evaluation of the responses of a gravimetric gas sensor based on mesoporous functionalized silica: Application to 2,4-DNT and TNT detection

Cited by 18 publications

References 23 publications

Gas sensors based on mass-sensitive transducers. Part 2: Improving the sensors towards practical application

Gas sensors based on mass-sensitive transducers. Part 2: Improving the sensors towards practical application

Electron-Stimulated Hydroxylation of Silica Bilayer Films Grown on Ru(0001): A Combined HREELS and EPR Study

Gas Sensing System Composed of IC-Foundry-Compatible Microcantilever, Advanced Sensing Material, and Intelligent Signal Processing

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