Sputtered thin films of CuBr for ammonia microsensors: morphology, composition and ageing

Bendahan, Marc; Lauque, Pascal; Lambert-Mauriat, C.; Carchano, H.; Seguin, Jean-Luc

doi:10.1016/s0925-4005(02)00004-7

Cited by 39 publications

(13 citation statements)

References 7 publications

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“…The maximum value allowed at the working place for 8 h exposure is only 25 ppm and the olfactory limit of detection of ammonia gas is 55 ppm [1]. Therefore, ammonia sensors are required to monitor its concentration in chemical, food processing and power plants where this gas is used or generated.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, ammonia sensors are required to monitor its concentration in chemical, food processing and power plants where this gas is used or generated. Various sensing materials have been reported for the detection of ammonia, such as tellurium thin films [2], nanoporous anodized alumina [3], thin films of CuBr [1], acrylic acid doped polyaniline [4], solid-state Cu x S films [5], and Langmuir-Blodgett polypyrrole films [6]. However, the sensors prepared with these above sensing materials have the limitation for ammonia detection at ppb level.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Electrospun fibrous polyacrylic acid membrane-based gas sensors

Ding

Yamazaki

Shiratori

2005

Sensors and Actuators B: Chemical

135

108

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Electrospun fibrous polyacrylic acid membrane-based gas sensors

Ding

Yamazaki

Shiratori

2005

Sensors and Actuators B: Chemical

135

108

View full text Add to dashboard Cite

“…Physiologically normal levels of ammonia present in human breath lie below approximately 1 ppm; therefore, the ammonia emitted by the human body cannot be detected using olfaction, except in cases of very severe disease conditions, where the ammonia concentration exceeds the human perception limit of 55 ppm. (39) Numerous methods can be used for ammonia detection; however, bench-top systems are often required for low-level detection. PAA is well known as a sensitive receptor for ammonia detection.…”

Section: Ammonia Detection In Human Breathmentioning

confidence: 99%

Nanoassembled Thin-film-coated Quartz Crystal Microbalance Odor Sensors for Environmental and Human Breath Ammonia Assessments

Lee

Selyanchyn

Wakamatsu

et al. 2018

Sensors and Materials

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In this short review, we describe our recent approaches and strategies for the development of quartz crystal microbalance (QCM)-based odor sensor systems for environmental and human health monitoring. QCM electrodes, which were modified with sensitive nanometerthick coatings via layer-by-layer (LbL) deposition, were used to develop a system for measuring significant environmental changes in indoor air. Identification of the origin of environmental changes was possible via the differential signal analysis of obtained data. The sensors showed different responses to humidity changes, hazardous gas (ammonia), or cigarette smoke exposure. In addition, QCM sensors with porous films comprising silica nanoparticles and poly(allylamine hydrochloride) (PAH) were fabricated via an electrostatic self-assembly method and they exhibited considerable sensitivity to relative humidity (RH). The infusion of poly(acrylic acid) (PAA) into the multilayer porous film enabled the construction of a highly sensitive and selective QCM sensor device for the detection of gaseous ammonia. Two types of QCM sensors, with and without PAA, enabled the simultaneous quantitative detection of humidity and ammonia. Preliminary tests were conducted to detect low concentrations of ammonia in human breath, which are of clinical relevance. The results obtained showed that the sensor can detect ammonia in human breath at pathological levels (greater than 3 ppm).

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“…For instance, 100-200 ppm of ammonia induce drowsiness, salivation and loss of appetite in humans [11,12]. According to the regulatory agency in Brazil, the ammonia exposure level at working places should not exceed 20 ppm within 48 h/week [13], while in England the ammonia exposure should not exceed 25 ppm in 8 h [14]. The human olfactory limit of detection for ammonia is 55 ppm, but loss of sensitivity occurs after long and repeated exposure [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Hybrid layer-by-layer (LbL) films of polyaniline, graphene oxide and zinc oxide to detect ammonia

André

Shimizu

Miyazaki

et al. 2017

Sensors and Actuators B: Chemical

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Reliable gas sensors operating at room temperature are in demand for monitoring the environment for hazardous pollutants, such as ammonia (NH 3) gas that may become toxic to humans and animals above a threshold concentration. In this paper we report on the combination of three materials, namely polyaniline (PANI), graphene oxide (GO) and zinc oxide (ZnO), to produce hybrid layer-by-layer (LbL) films used for sensing NH 3 with impedance spectroscopy measurements. The deposition of tetralayered PANI/GO/PANI/ZnO LbL films was confirmed with UV-vis. absorption and Raman spectroscopies, while atomic force microscopy (AFM) served to investigate film morphology. Exposure of these LbL films to NH 3 caused film roughness to vary, in an effect that depended on the number of tetralayers. Because of synergy in the materials properties, the films with 3 tetralayers were found to be the most adequate for detecting NH 3 in the range from 25 ppm to 500 ppm with a response time of 30 s. These figures of merit are adequate for monitoring working environments regarding gas exposure, and highlight the usefulness of the control of film architecture provided by the LbL technique.

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Sputtered thin films of CuBr for ammonia microsensors: morphology, composition and ageing

Cited by 39 publications

References 7 publications

Electrospun fibrous polyacrylic acid membrane-based gas sensors

Electrospun fibrous polyacrylic acid membrane-based gas sensors

Nanoassembled Thin-film-coated Quartz Crystal Microbalance Odor Sensors for Environmental and Human Breath Ammonia Assessments

Hybrid layer-by-layer (LbL) films of polyaniline, graphene oxide and zinc oxide to detect ammonia

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