The speed of response of MISiCFET devices

Wingbrant, H.; Lundström, Ingemar; Spetz, Anita Lloyd

doi:10.1016/s0925-4005(03)00228-4

Cited by 37 publications

(19 citation statements)

References 9 publications

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“…The second uses flow rates more traditional in laboratories, of the order of 100 cm 3 /min. Two injectors, which permanently inject both concentrations, are alternatively moved below the sensor within milliseconds [3,4].…”

Section: "Intrinsic" Response and Recovery Timesmentioning

confidence: 99%

“…The response and recovery times reported in the literature or in technical notices of commercial sensors, automatically include the delays due to the fluid delivery system, specific to every experimental setup. Even if these delays can be reduced to a few milliseconds in some very special cases [1][2][3][4], they can never be totally suppressed. It is thus of primary importance to estimate, at least roughly, which part of the response/recovery time measured experimentally, arises from the fluid delivery system, before drawing conclusions about what is called hereafter the sensor "intrinsic" response/recovery time.…”

Section: Introductionmentioning

confidence: 99%

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Evidence of a correlation between the non-linearity of chemical sensors and the asymmetry of their response and recovery curves

Ménil

Susbielles

Debéda

et al. 2005

Sensors and Actuators B: Chemical

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Section: "Intrinsic" Response and Recovery Timesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evidence of a correlation between the non-linearity of chemical sensors and the asymmetry of their response and recovery curves

Ménil

Susbielles

Debéda

et al. 2005

Sensors and Actuators B: Chemical

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“…Field effect sensors with Pt as catalytic gate material have been shown useful for combustion control applications in wood fired boilers [1], and for NH 3 detection in selective catalytic reduction (SCR) systems as well as for lambda cold start sensors [2]. In field effect devices, the sensor response depends on the interaction between the catalytic gate material and the gas molecules.…”

Section: Introductionmentioning

confidence: 99%

Carbide and nanocomposite thin films in the Ti–Pt–C system

Lewin

Buchholt

et al. 2010

Thin Solid Films

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Thin films in the Ti-Pt-C system were deposited by non-reactive, DC-magnetron sputtering.Samples were characterised using X-ray photoelectron spectroscopy, X-ray diffraction, and transmission electron microscopy. A previously not reported metastable solid solution carbide, (Ti 1-x Pt x )C y with a Pt/Ti ratio of up to 0.43 was observed. This solid solution phase was present both as single phase in polycrystalline samples, and together with amorphous carbon (a-C) in nanocomposite samples. Annealing of nanocomposite samples lead to decomposition of the solid solution phase and formation of a nc-TiC x /a-C/nc-Pt nanocomposite. Test sensors for automotive gas exhausts manufactured from such a three-phase material suffers from complete oxidation of the coating at 400 °C with no observed sensor activity.

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“…monitoring of the emissions from cars a sensor response in the order of milliseconds [1] is necessary; in addition, the sensor has to withstand harsh environments with high temperatures and corrosive atmospheres.…”

mentioning

confidence: 99%

“…Another possible automotive application of a MISiC FET is as a lambda-sensitive device for enhancing the efficiency of the catalytic converter [10]. For these applications, it was reported that the sensor response time of a MISiC FET is below 100 ms for ammonia exposure (at 300°C) and below 20 ms for hydrogen (at 550°C) which exceeds requirements considerably [1]. The MISiC FET is also commercialized as a sensor system for control of domestic boilers [11], [12].…”

mentioning

confidence: 99%

Increasing the selectivity of Pt-gate SiC field effect gas sensors by dynamic temperature modulation

et al. 2010

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Abstract-Based on a diode coupled silicon carbide field effect transistor with platinum as catalytic gate material, the influence of dynamic temperature modulation on the selectivity of GasFETs has been investigated. This operating mode, studied intensively for semiconductor gas sensors, has only recently been applied to field effect transistors. A suitable temperature cycle (T-cycle) for detection of typical exhaust gases (CO, NO, C 3 H 6 , H 2 , NH 3 ) was developed and combined with appropriate signal processing. The sensor data was evaluated using multivariate statistics, e.g. linear discriminant analysis (LDA). Measurements have proven that typical exhaust gases can be discriminated in backgrounds with 0%, 10% and 20% oxygen. Furthermore, we are able to quantify the mentioned gases and to determine unknown concentrations based on training data. Very low levels of relative humidity (r.h.) below a few percent influence the sensor response considerably but for higher levels the cross interference of humidity is negligible. In addition, experiments regarding stability and reproducibility were performed.

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The speed of response of MISiCFET devices

Cited by 37 publications

References 9 publications

Evidence of a correlation between the non-linearity of chemical sensors and the asymmetry of their response and recovery curves

Evidence of a correlation between the non-linearity of chemical sensors and the asymmetry of their response and recovery curves

Carbide and nanocomposite thin films in the Ti–Pt–C system

Increasing the selectivity of Pt-gate SiC field effect gas sensors by dynamic temperature modulation

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