Material properties and the influence of metallic catalysts at the surface of highly dense SnO2 films

Wöllenstein, Jürgen; Böttner, H.; Jaegle, M.; Becker, Wolf-Jürgen; Wagner, Elmar

doi:10.1016/s0925-4005(00)00569-4

Cited by 67 publications

(20 citation statements)

References 8 publications

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“…The test gas mixture applied was 500 ppm CO in synthetic air. lysts see [3,[33][34][35][36][37][38][39][40]. We will see in the discussion below that the strong effects of noble metal catalysts on the response to some gases is reflected in the physical parameters that govern the sensing behaviour.…”

Section: Results Of Gas Measurementsmentioning

confidence: 99%

A rate equation approach to the gas sensitivity of thin film metal oxide materials

Ahlers¹,

Müller²,

Doll

2005

Sensors and Actuators B: Chemical

166

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Section: Results Of Gas Measurementsmentioning

confidence: 99%

A rate equation approach to the gas sensitivity of thin film metal oxide materials

Ahlers¹,

Müller²,

Doll

2005

Sensors and Actuators B: Chemical

166

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“…1a and 2a, at 250°C, platinizing increased the amplitude of the response by a couple of times, but still further improved the time characteristics, so that the rise and fall became several times faster. The gain in the response speed has also been observed in the -type materials (see, e.g., [21]). …”

Section: Resultsmentioning

confidence: 69%

Pt coated Cr2O3 thin films for resistive gas sensors

Kasikov¹,

Gerst²,

Kikas

et al. 2009

Open Physics

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Abstract:The resistive response of atomic layer deposited thin epitaxial α-Cr 2 O 3 (0 0 1) films, to H 2 and CO in air, was studied. The films were covered with Pt nanoislands formed by electron-beam evaporation of a submonolayer amount of the material. The gas measurements were performed at 250°C and 450°C. These temperatures led to different proportion of chemical states, Pt 2+ and Pt 4+ , to which the Pt oxidized. The modification was ascertained by the X-ray photoelectron spectroscopy method. As a result of the modification, the response was fast at 250°C, but slowed at 450°C. A disadvantageous abundance of Pt 4+ arising at 450°C in air could be diminished by high-vacuum annealing thus restoring the response properties of the system at 250°C. PACS

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“…films are usually used to detect CO: their resistance can move from a few in air to 200 when high levels of CO are present [13] (these reported values are of practical interest in environmental monitoring and exhaust ambience applications).…”

Section: Smart Sensor Electronicsmentioning

confidence: 99%

A Reusable Smart Interface for Gas Sensor Resistance Measurement

Merino

Bota

Casanova

et al. 2004

IEEE Trans. Instrum. Meas.

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Abstract-The advances of the semiconductor industry enable microelectromechanical systems sensors, signal conditioning logic and network access to be integrated into a smart sensor node. In this framework, a mixed-mode interface circuit for monolithically integrated gas sensor arrays was developed with high-level design techniques. This interface system includes analog electronics for inspection of up to four sensor arrays and digital logic for smart control and data communication. Although different design methodologies were used in the conception of the complete circuit, high-level synthesis tools and methodologies were crucial in speeding up the whole design cycle, enhancing reusability for future applications and producing a flexible and robust component.Index Terms-Circuit synthesis, gas detector, mixed analog-digital integrated circuit.

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Material properties and the influence of metallic catalysts at the surface of highly dense SnO2 films

Cited by 67 publications

References 8 publications

A rate equation approach to the gas sensitivity of thin film metal oxide materials

A rate equation approach to the gas sensitivity of thin film metal oxide materials

Pt coated Cr2O3 thin films for resistive gas sensors

A Reusable Smart Interface for Gas Sensor Resistance Measurement

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