Sensing mechanism in tin oxide-based thick-film gas sensors

Srivastava, Rajeev; Lal, Pyare; Dwivedi, R.; Srivastava, S.K.

doi:10.1016/0925-4005(94)01248-2

Cited by 72 publications

(27 citation statements)

References 18 publications

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“…This gas sensor operates on the principle of conductance change due to chemisorption of gas molecules to the sensing layer. Much research has been done on this type of sensor demonstrating promising results using a sensor that is rugged and inexpensive [4][5][6][7][8]. However this type of sensor can have some drawbacks, the primary one being that it has a low level of selectivity.…”

Section: Metal Oxide Semiconductormentioning

confidence: 99%

Ammonia detection in the UV region using an optical fiber sensor

et al. 2009

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This paper describes an optical fiber sensor for the monitoring of ammonia gas. An open path optical technique is used to analyze the absorption lines of ammonia within the ultra violet region. Experimental results describing the operation of the sensor are presented and are compared with theory. A comparison between a commercial sensor has been carried out and cross sensitivity testing with regard to oxygen and carbon dioxide gas is reported.

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Section: Metal Oxide Semiconductormentioning

confidence: 99%

Ammonia detection in the UV region using an optical fiber sensor

et al. 2009

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“…There are many principles for measuring NH 3 described in the literature (Timmer et al 2005;Yamazoe 2005). The ammonia sensors that have been manufactured in the largest quantities are mostly based on SnO 2 sensors (Clifford and Tuma 1983;Huebner and Drost 1991;Srivastava et al 1994;Sberreglieri 1995;Imawan et al 2000;Zakrzewska 2001). These sensors are rugged and inexpensive.…”

Section: Introductionmentioning

confidence: 99%

Studies on gas sensing performance of pure and modified barium strontium titanate thick film resistors

Jain¹,

Patil²,

Patil

et al. 2007

Bull Mater Sci

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Barium strontium titanate ((Ba 0⋅87 Sr 0⋅13 )TiO 3 -BST) ceramic powder was prepared by mechanochemical process. The thick films of different thicknesses of BST were prepared by screen-printing technique and gas-sensing performance of these films was tested for various gases. The films showed highest response and selectivity to ammonia gas. The effect of film thickness on gas response was also studied. As prepared BST thick films were surface modified by dipping them into an aqueous solution of titanium chloride (TiCl 3 ) for different intervals of time. Surface modification shifted response to H 2 S gas suppressing the responses to ammonia and other gases. The surface modification, using dipping process, altered the adsorbate-adsorbent interactions, which gave the unusual sensitivity and selectivity effect. Sensitivity, selectivity, thermal stability, response and recovery time of the sensor were measured and presented.

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“…These gases during the adsorption interact with the oxygen on the lm surface, which leads to the increase in its conductivity at the expense of the decrease in the number of electron localization centers and the lowering of the intergranular barriers [4,5].…”

Section: Experimental Details and Resultsmentioning

confidence: 99%

The Kinetics of the Change of SnO_xThin Films Conductivity during the Gas-Adsorptive Interaction

et al. 2014

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The subjects of investigation are thin semiconductor SnOx lms received by thermal oxidation. The inuence of gas environments on electrical conductivity of lms were investigated by a static way by measurement of kinetic and equilibrium isotherm of adsorption of trimethylamine, alcohol, hydrogen sulde and ammonia. The communication between a type isotherm of adsorption, chemical nature of gas and temperature is shown.

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Sensing mechanism in tin oxide-based thick-film gas sensors

Cited by 72 publications

References 18 publications

Ammonia detection in the UV region using an optical fiber sensor

Ammonia detection in the UV region using an optical fiber sensor

Studies on gas sensing performance of pure and modified barium strontium titanate thick film resistors

The Kinetics of the Change of SnO_xThin Films Conductivity during the Gas-Adsorptive Interaction

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Sensing mechanism in tin oxide-based thick-film gas sensors

Cited by 72 publications

References 18 publications

Ammonia detection in the UV region using an optical fiber sensor

Ammonia detection in the UV region using an optical fiber sensor

Studies on gas sensing performance of pure and modified barium strontium titanate thick film resistors

The Kinetics of the Change of SnOxThin Films Conductivity during the Gas-Adsorptive Interaction

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The Kinetics of the Change of SnO_xThin Films Conductivity during the Gas-Adsorptive Interaction