Vapor Trace Recognition Using a Single  Nonspecific Chemiresistor

Dobrokhotov, Vladimir; Larin, A. V.; Sowell, Dewayne

doi:10.3390/s130709016

Cited by 16 publications

(13 citation statements)

References 27 publications

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“…Between grains the merging of the two depletion regions leads to an energetic interface known as Schottky barrier the magnitude of which depends on the conductivity of the material [41]. The reaction of adsorbed oxygen species with adsorbed VOCs can modify the intensity of Schottky barrier [42], resulting in a variation of conductivity (Fig. 3).…”

Section: Operating Principle and Detection Mechanisms Of Semiconductimentioning

confidence: 97%

Detection of hazardous volatile organic compounds (VOCs) by metal oxide nanostructures-based gas sensors: A review

Mirzaei

Leonardi

Neri

2016

Ceramics International

950

389

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Section: Operating Principle and Detection Mechanisms Of Semiconductimentioning

confidence: 97%

Detection of hazardous volatile organic compounds (VOCs) by metal oxide nanostructures-based gas sensors: A review

Mirzaei

Leonardi

Neri

2016

Ceramics International

950

389

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“…The selectivity is attributed to a higher catalytic activity of Pt to toluene than to the other reducing gases tested . Recently, Dobrokhtov et al fabricated an electronic nose that enables trace detection of flammable and explosive vapor. The device was composed of five chemiresistive sensors coupled with a pattern recognition system.…”

Section: Heterostructured Gas Sensorsmentioning

confidence: 99%

Atomic Layer Deposition to Materials for Gas Sensing Applications

Marichy

Pinna

2016

Adv Materials Inter

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Atomic layer deposition is a thin film deposition technique based on self‐terminated surface reactions. Contrarily to most of the thin film deposition techniques, it is not a line of sight deposition technique due to the sequential introduction of the gaseous precursors and because the reactants can only react with surface species. The precursors can thus diffuse into porous structures and the conformal coating of high aspect ratio structures can be achieved. Because of these peculiarities, atomic layer deposition is an attractive technique for fabricating materials to be applied in resistive gas sensors. This article focuses on materials for resistive gas sensor devices in which the sensing material is elaborated using atomic layer deposition, in at least one step of the fabrication. It will be shown that atomic layer deposition has proven to be well‐suited for the elaboration of compact thin films, nanostructures, and heterostructures to be applied for the detection of a variety of analytes such as toxic compounds, pollutants, explosives, etc. The chemical and physical properties of the sensing layers will be discussed in parallel to the gas sensing mechanisms in an attempt to develop clear structure–property correlations

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“…Moreover, with optimized sensing performances, they could provide complementary information on air quality as compared to standard analyzers and passive samplers. Among potential gas sensors, many developments have been focused on chemoresistors with metal oxide as sensitive material for toluene vapor detection [9][10][11][12][13][14] and more especially, SnO 2 sensors [15]. Optimizations including higher sensitivity, lower detection threshold, better selectivity and reduced power consumption remain necessary to make them appropriate for such application.…”

Section: Introductionmentioning

confidence: 99%