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

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

doi:10.1016/j.aca.2010.12.039

Cited by 72 publications

(60 citation statements)

References 17 publications

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“…Microchannels are then sealed with a glass cap on which are fixed the metallic capillaries used as fluidic connection. Compared to our previous designs [1,2], the interest of having the fluidic connections on the glass cover is that there is no limitation on the capillary size since inlet/outlet are not dipped into the silicon wafer (Fig.1b). Our micro-devices include also a platinum micro-heater patterned on the backside by clean-room process (Lift-off).…”

Section: Design and Fabricationmentioning

confidence: 97%

“…With these requirements in mind, the combination Carbopack-PS seems to be a very promising couple substrate-adsorbent. Indeed, as we have previously reported, PS allows reducing the desorption temperature of the couple adsorbent/adsorbed compound [1]. As a structural material, PS can be easily inserted into silicon micro-fluidic devices directly during their processing.…”

Section: Introductionmentioning

confidence: 93%

“…Prior the sealing of the glass cover, the silicon pores were grown within the microchannels by anodic etching in a bath of HF (50%) and EtOH in a ratio of 1:1. The size, shape and depth of pores depend on several parameters such as the doping and the resistivity of the wafer, the applied current density and the etching time [1]. In this study, 525um thick n-type silicon wafers with resistivity of 5Ω.cm were used to generate macroporous silicon.…”

Section: Design and Fabricationmentioning

confidence: 99%

“…In previous communications, we reported the development of a μGP for pollution monitoring [1,2]. Here, we address the detection of 2, 4-dinitrotoluene with a Carbopack-PS μGP.…”

Section: Introductionmentioning

confidence: 95%

“…The optimization of the design of the micro-device and of the experimental parameters is of importance for maximizing the "amplifying effect" of the preconcentrator. In summary, a high adsorption flow rate, a low desorption flow rate, a relatively long adsorption time and a very short desorption time are required [1,2]. Besides the optimization of the adsorption-desorption parameters, the performance of the preconcentrator relies also on an optimum choice of the adsorbent material.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

MEMS-based Porous Silicon Preconcentrators Filled with Carbopack-B for Explosives Detection

Camara

James

Breuil

et al. 2014

Procedia Engineering

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Section: Design and Fabricationmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 93%

Section: Design and Fabricationmentioning

confidence: 99%

“…In previous communications, we reported the development of a μGP for pollution monitoring [1,2]. Here, we address the detection of 2, 4-dinitrotoluene with a Carbopack-PS μGP.…”

Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

MEMS-based Porous Silicon Preconcentrators Filled with Carbopack-B for Explosives Detection

Camara

James

Breuil

et al. 2014

Procedia Engineering

Self Cite

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Preconcentration of Nitroalkanes with Archetype Metal–Organic Frameworks (MOFs) as Concept for a Sensitive Sensing of Explosives in the Gas Phase

Rieger

Wittek

Scherer

et al. 2017

Adv Funct Materials

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Thermal desorption based enrichment is a general concept that can enhance any detection system's sensitivity and selectivity. Given their large interior surface area and chemical versatility, archetype metal–organic frameworks (MOFs) are selected for preconcentration of explosives and their precursors occurring in low concentrations, and are compared to the state‐of‐the‐art sorbent Tenax TA. Applying inverse gas chromatography (iGC), this study shows that several archetype MOFs, namely HKUST‐1 and MIL‐53, surpass Tenax regarding their specific retention volume for nitromethane, a typical ingredient in improvised explosives. Using linear hydrocarbons as reference probe molecules, the dispersive surface energy is determined for all MOFs along with the specific contribution of the nitro group for HKUST‐1 and ZIF‐8. Trends from pulse‐chromatographic iGC‐investigations are mostly followed in breakthrough and thermal desorption experiments using a 1000 ppm nitromethane source. In these experiments, HKUST‐1 proves the peak substance, with enrichment factors being 109‐fold higher than for Tenax, followed by MIL‐53. In case of HKUST‐1, this factor is successfully reproduced for a 1 ppm concentration scenario. This shows that archetype MOFs can be suitable or even superior candidates for a sensitive sensing of nitroalkane explosives from the gas phase by a concept of preconcentration.

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

Cited by 72 publications

References 17 publications

MEMS-based Porous Silicon Preconcentrators Filled with Carbopack-B for Explosives Detection

MEMS-based Porous Silicon Preconcentrators Filled with Carbopack-B for Explosives Detection

Preconcentration of Nitroalkanes with Archetype Metal–Organic Frameworks (MOFs) as Concept for a Sensitive Sensing of Explosives in the Gas Phase

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

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