The response of tin acetylacetonate and tin dioxide-based gas sensors to hydrogen and alcohol vapours

Vrňata, Martin; Myslik, V.; Vyslouzil, Filip; Jelı́nek, M.; Lančok, J.; Zemek, J.

doi:10.1016/s0925-4005(00)00589-x

Cited by 35 publications

(12 citation statements)

References 14 publications

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“…It is well known that the as-deposited layers of acetylacetonates exhibit very high electric resistance, so the next necessary technological step includes their activation in order to acquire gas sensing properties. (4,5,7,8) The thermal activation process developed in our laboratory, i.e., treatment by controlled heating in a furnace (up to 400°C, 9 h, synthetic air atmosphere containing 5,000 ppm hydrogen), is discussed in detail in a previous work. (9) The depositions were carried out on three types of substrate: (a) glass slides (samples for SEM and energy-dispersive X-ray analysis), (b) polished silicon wafers (samples for AFM analyses), (c) alumina sensor substrates equipped with interdigital Pt contacts on one side and resistance heating on the opposite side (measurement of response to various gases).…”

Section: Methodsmentioning

confidence: 99%

“…The testing proceeded in special measuring equipment developed in our laboratory. (7,8) This system measures the resistance values automatically and calculates the dc response in relation to the sensor temperature or concentration of detected gas. It also enables us to process and analyze the measured data, and to fit them with a suitable function.…”

Section: Methodsmentioning

confidence: 99%

“…(4)(5)(6) According to our previous experience, (7,8) the layers also prepared from acetylacetonates by the PLD method (where the deposited material is transferred through a plasma plume) are thermally stable and simultaneously sensitive to hydrogen, alcohol vapors, and ozone, for example.…”

Section: Introductionmentioning

confidence: 99%

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Sensing Properties of Tin Acetylacetonate-Based Thin Films Doped with Platinum

2012

Sensors and Materials

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Key words: gas sensing, tin acetylacetonate, pulsed laser deposition (PLD) method, selectivity tunable by temperature Thin sensing films based on tin acetylacetonate (SnAcAc) with a platinum catalyst were prepared in situ by pulsed laser deposition (PLD) with a Nd:YAG laser. The morphology and roughness of both as-deposited and annealed layers were characterized. These layers were also deposited on alumina sensor substrates with interdigital Pt electrodes and then used for the detection of hydrogen, n-butanol, toluene, and water vapors in synthetic air. The temperature dependence of the response of the prepared sensors was measured in the range of 40-350°C. It was proved that the selectivity to the above mentioned gases is easily tunable by adjusting the operating temperature of the sensor. The maximum response was achieved at 110°C for hydrogen, 220°C for n-butanol, 300°C for toluene, and 340°C for water vapor. The activation energy of surface reactions taking place during the detection process was also calculated.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Sensing Properties of Tin Acetylacetonate-Based Thin Films Doped with Platinum

2012

Sensors and Materials

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“…The response time (τ r ) is normally defined as the time required to reach 90% of the difference [R a -(R g ) eq ] after sudden change of the atmosphere from a state with no gas (i. e. air) to that containing the target gas [1][2] . The recovery time similarly is defined as the time it takes to reach 90% of the difference [R a -(R g ) eq ] after the reverse change of atmosphere 1 .…”

Section: Introductionmentioning

confidence: 99%

“…The recovery time similarly is defined as the time it takes to reach 90% of the difference [R a -(R g ) eq ] after the reverse change of atmosphere 1 . Apart from the above parameters, initialization time or warm-up time is a very important parameter, which determines the application potentiality of the sensors.…”

Section: Introductionmentioning

confidence: 99%

Effect of initialization time on application potentiality of a ZnO thin film based LPG sensor

Mitra

Halder

2009

Mat. Res.

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A prototype electronic LPG (Liquid Petroleum Gas) sensor based on zinc oxide (ZnO) film has been fabricated. The objective of the present work was to investigate the importance of initialization time (also called warm-up time) on the application potentiality of the ZnO based alarm. The role of sensor geometry on initialization time is presented. The electronic circuitry of the prototype LPG device alarm is discussed. It is shown that that the initialization time depends on the switch off time (or the time for which the sensor was kept idle). The resistive mode sensors can be fixed at 40% LEL (Lower Explosive Limit) of LPG for safe operation.

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Investigation of laser‐produced plasma multistructuring by floating probe measurements and optical emission spectroscopy

Irimiciuc

Chertopalov

Crăciun

et al. 2020

Plasma Processes & Polymers

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With the continuous development of pulsed laser deposition as a versatile technique for the deposition of complex thin films, there is a need for a better understanding of the role and control of the deposition parameters. The understanding of the particle kinetics and plasma chemistry during the deposition process can greatly improve the properties of the synthesized films. By using the floating voltage regime of the Langmuir probe technique, we performed angular and time-resolved measurements during laser ablation of an Ag target, which evidenced the structuring of the plasma plume in ultrahigh vacuum conditions. The addition of N 2 gas in the pressure range from 5 × 10-5 to 10 Pa leads to more rapid plasma thermalization and the control of its kinetic energy. The electrical measurements were complemented by optical emission spectroscopy, which showcased the presence of neutral and multiple ionized species distributed across the laser-produced plasma plume. The plasma homogenization resulted in a decrease of the mean free path of Ag ions and atoms, which increased both their excitation temperature and electron density.

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The response of tin acetylacetonate and tin dioxide-based gas sensors to hydrogen and alcohol vapours

Cited by 35 publications

References 14 publications

Sensing Properties of Tin Acetylacetonate-Based Thin Films Doped with Platinum

Sensing Properties of Tin Acetylacetonate-Based Thin Films Doped with Platinum

Effect of initialization time on application potentiality of a ZnO thin film based LPG sensor

Investigation of laser‐produced plasma multistructuring by floating probe measurements and optical emission spectroscopy

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