Micro gas preconcentrator in porous silicon filled with a carbon absorbent

Camara, El Hadji Malick; Breuil, Philippe; Briand, D.; Guillot, L.; Pijolat, Christophe; Rooij, N. F. de

doi:10.1016/j.snb.2010.05.054

Cited by 42 publications

(41 citation statements)

References 18 publications

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“…The different channels are designed with the necessity of having some pillars or walls within the channels in order to control the powders deposition by fluidic solutions [23,24] . The neutral microchannel is designed without structures in the internal chamber while the zigzag design with channel system at inlet/outlet, mostly used in this work, is made with "V" shaped structures in order to improve the flow distribution not only during the adsorbent deposition but also during experiments.…”

Section: Preconcentratormentioning

confidence: 99%

“…It was observed that the use of porous silicon has increased the quantity of deposited carbon in the micro-channels. In fact, the presence of pores on the surface of the walls constitutes an important asset to get a good binding layer and thus to increase the quantity of adsorbent filled in the micro-channel compared to non-porous silicon [23] .…”

Section: Adsorbent Depositionmentioning

confidence: 99%

“…This heating element is used to heat the device at temperatures up to 500°C with a very homogeneous distribution of the temperature considering the good thermal conductivity of the silicon, as it was reported in our previous works . 182 [23,24] To have a good regulation of temperature, the micro-preconcentrator is suspended in a metallic box (Figure 2). …”

Section: Heating Elementmentioning

confidence: 99%

“…Since the maximum of the desorption peak is an increasing function of the heating rate [23] , the preconcentration tests were performed with a heating rate of 160°C/min, which corresponds to the maximum rate that can reach the heating resistance deposited on the backside of the micro-channels. the maximal temperature is 350°C.…”

Section: Optimization Of the Experimental Parametersmentioning

confidence: 99%

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A micro gas preconcentrator with improved performance for pollution monitoring and explosives detection

Camara

Breuil

Briand

et al. 2011

Analytica Chimica Acta

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This paper presents the optimization of a micro gas preconcentrator based on a micro-channel in porous and non-porous silicon filled with an adequate adsorbent. This micro gas preconcentrator is both applicable in the fields of atmospheric pollution monitoring (Volatil Organic Compounds-VOCs) and explosives detection (nitroaromatic compounds). Different designs of micro-devices and adsorbent materials have been investigated since these two parameters are of importance in the performances of the microdevice. The optimization of the device and its operation were driven by its future application in outdoor environments. Parameters such as the preconcentration factor, cycle time and the influence of the humidity were considered along the optimization process. As a result of this study, a preconcentrator with a total cycle time of 10 minutes and the use of single wall carbon nanotubes (SWCNTs) as adsorbent exhibits a good preconcentration factor for VOCs with a limited influence of the humidity. The benefits of using porous silicon 1 24 25 26 27 28 to modify the gas desorption kinetics are also investigated.

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Section: Preconcentratormentioning

confidence: 99%

Section: Adsorbent Depositionmentioning

confidence: 99%

Section: Heating Elementmentioning

confidence: 99%

Section: Optimization Of the Experimental Parametersmentioning

confidence: 99%

See 2 more Smart Citations

A micro gas preconcentrator with improved performance for pollution monitoring and explosives detection

Camara

Breuil

Briand

et al. 2011

Analytica Chimica Acta

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“…They have been successfully employed for a variety of applications spanning from explosives detection [6] to environmental monitoring [7] and more recently in medical diagnostics of chronic obstructive pulmonary diseases [8]. Additionally, the combination of GC/IMS or GC/DMS with a preconcentrator is increasingly becoming common use due to its performance improvement both in terms of selectivity and sensitivity [9,10].…”

Section: Introductionmentioning

confidence: 99%

Fast screening for presence of muddy/earthy odorants in wine and in wine must using a hyphenated gas chromatography-differential ion mobility spectrometry (GC/DMS)

Camara¹,

Gharbi²,

Cocco³

et al. 2011

Int. J. Ion Mobil. Spec.

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Rapid, hyphenated detection techniques involving a gas chromatograph (GC) coupled to a classical timeof-flight ion mobility (IMS) spectrometer, or more recently, to a micro-machined, miniature differential ion mobility spectrometer (DMS) are quite attractive for in-situ detection of many kinds of volatile organic compounds (VOCs) of concern and notably of natural contaminants appearing in the headspaces of selected foodstuff. This work aims at a rapid detection, identification and quantification of geosmin in the headspace of grape must and of wine. Samples of white and red wines have both been analyzed with a hyphenated GC/DMS and by Solid Phase Micro-Extraction (SPME) coupled to GC/MS taken as a reference. The detection of geosmin at concentrations below the human olfactory threshold of 50 ng/L has been demonstrated.

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A Review of Preconcentrator Materials, Flow Regimes and Detection Technologies for Gas Adsorption and Sensing

Chowdhury

Lee

Day

et al. 2022

Adv Materials Inter

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of gases on solid surfaces. [9] This understanding aided the pioneering development of the first preconcentrator in 1969 by Dave et al. [10] This first preconcentrator utilized a polymer as the material for adsorption and desorption. Later, the first carbonaceous preconcentrator was developed in 1975 by Russell et al. [11] Until 1979, most preconcentration research relied on large instrumentation for analyte detection. However, in 1979, the development of the first micro gas chromatography (μGC) demonstrated that miniature detection methods are also possible. [12] The term "preconcentrator" was not used until 1989 by Thomas et al. [13] Later, the usability of oxide materials for preconcentration was explored; Casalnuovo et al. reported a SiO 2 based preconcentrator in 2001. [14] Ueno et al. introduced a metal-organic framework (MOF) based preconcentrator in 2007. [15] These major advances in preconcentrator development are shown in a timeline in Figure 1. The number of publications containing the term "gas preconcentrator," "gas pre concentrator," "gas pre-concentrator," "VOC preconcentrator" over time since 1989 is shown in Figure 2.In this review, recent developments of gas preconcentrators, preconcentrator materials, and preconcentration techniques are summarized. Different materials, their recent uses, limitations, and future potential are reviewed and discussed.

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Micro gas preconcentrator in porous silicon filled with a carbon absorbent

Cited by 42 publications

References 18 publications

A micro gas preconcentrator with improved performance for pollution monitoring and explosives detection

A micro gas preconcentrator with improved performance for pollution monitoring and explosives detection

Fast screening for presence of muddy/earthy odorants in wine and in wine must using a hyphenated gas chromatography-differential ion mobility spectrometry (GC/DMS)

A Review of Preconcentrator Materials, Flow Regimes and Detection Technologies for Gas Adsorption and Sensing

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