A new type of gas sensor based on the thermovoltaic effect in zinc oxide inhomogeneously doped with mixed-valence impurities

Пронин, И. А.; Yakushova, N. D.; Dimitrov, Dimitar; Krasteva, L. K.; Papazova, K. I.; Карманов, А. А.; Averin, I. A.; Georgieva, Angelina; Мошников, В. А.; Terukov, E. I.

doi:10.1134/s1063785017090255

Cited by 9 publications

(4 citation statements)

References 13 publications

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Section: Investigation Of the Sensory Response Dependence Of Zno/zno-mentioning

confidence: 99%

“…The dependence of gas sensitivity on the concentration of the gas-analyzer and the temperature is of particular interest for the development of gas sensors. We can calculate the gas sensitivity as a module of the relative change in the electromotive force when exposed to the gas-analyzer sensor, expressed as a percentage [15]: It should be noted that for the samples, the upper layer of which was formed by two immersions in the sol, the dependence U(C) changed the sign, passing through zero at C ≈ 300 ppm. This probably indicates the appearance of an inversion layer under the contact at a given gas concentration due to its reducing properties.…”

Section: Investigation Of the Sensory Response Dependence Of Zno/zno-mentioning

confidence: 99%

“…In particular, the appearance of a thermovoltaic response in two-layer thin-film ZnO/ZnO-Fe structures with a maximum modulus of 1200 µV at a temperature of 673 K was shown in [14]. Based on this effect, we first proposed the creation of a new type of potentiometric gas sensors based on the thermovoltaic effect [15]. This paper presents a systematic study of sensory elements of this type.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of Gas-Sensitive Properties of Thin-Film Thermovoltaic Sensor Elements Based on Zinc Oxide

et al. 2019

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Systematic research on a new type of gas sensor devices based on the thermovoltaic effect in zinc oxide, inhomogeneously doped with impurities of variable valence, is presented in the article. The ZnO-ZnO-Me two-layer sandwich structure, in which the thermovoltaic effect is observed, is synthesized using sol-gel technology from sols by dissolving the inorganic zinc salt in alcohol and adding a surfactant, followed by the mixing and maturation of the sol. The lower layer of the nanostructure is formed from pure zinc oxide by immersing the substrate at 2 /3 length in sol and drying. The upper layer of zinc oxide doped with copper or iron is formed by two or three immersions of the other end of the substrate by 2 /3 length, followed by drying and annealing. It has been established that, based on the developed sensor device, it is possible to obtain an increased response to gas-analyzers (ethanol being an example). Author Contributions: Conceptualization, I.P. and V.M.; formal analysis, I.A. and V.M.; investigation, I.P. and N.Y.; methodology, D.D.; software, A.K.; visualization, A.K.

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Section: Investigation Of the Sensory Response Dependence Of Zno/zno-mentioning

confidence: 99%

Section: Investigation Of the Sensory Response Dependence Of Zno/zno-mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Investigation of Gas-Sensitive Properties of Thin-Film Thermovoltaic Sensor Elements Based on Zinc Oxide

et al. 2019

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“…Наибольший интерес в современном приборостроении вызывают металлооксидные полупроводниковые материалы [5], которые широко применяются в качестве активных слоев газовых сенсоров для обнаружения в атмосфере различных вредных веществ, таких как угарный газ, аммиак, оксиды азота, сернистые газы и т.д. [6][7][8]. Сенсоры на основе металлооксидных полупроводников наиболее перспективный тип газочувствительных приборов, так как такие сенсоры обладают высокой чувствительностью к малым концентрациям газов, малым временем отклика, продолжительным сроком службы, простотой в эксплуатации, низкой себестоимостью и компактностью [9].…”

Section: Introductionunclassified

Principles of Creating a Virtual Multi-Sensor System for Recognition Gas Mixtures

Корабель¹,

Синёв²,

Шикунов³

et al. 2020

Physical and Chemical Aspects of the Study of Clusters, Nanostructures and Nanomaterials

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В широком диапазоне концентраций газов различной химической природы (аммиака, ацетона, пропанола и этанола) исследовалась концентрационная зависимость газочувствительности сенсора газа на основе наноструктурированной пленки диоксида олова при различных режимах его работы. Экспериментально показано, что концентрационная зависимость газочувствительности носит степенной характер, показатель степени n различен для разных газовых проб, причем величина показателя степенного закона n зависит от режима работы сенсора и химической природы анализируемой пробы. Изученное явление позволяет распознавать газовые пробы, содержащие пары веществ различной химической природы. Вероятность классификации газовых проб аммиака, ацетона, пропанола и этанола методом ближайших соседей составила более 95 %. The concentration dependence of the gas sensitivity of a gas sensor based on a nanostructured tin dioxide film was studied under various operating conditions in a wide range of concentrations of gases of various nature (ammonia, acetone, propanol, and ethanol). It has been experimentally shown that the concentration dependence of the gas sensitivity is power-law, the exponent n is different for different gas samples, and the value of the power-law exponent n depends on the operating mode of the sensor and the chemical nature of the sample being analyzed. The studied phenomenon makes it possible to recognize gas samples containing vapors of different chemical substances. The probability of classification of gas samples of ammonia, acetone, propanol and ethanol by the method of nearest neighbors was more than 95 %.

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Thermoelectric and electrical characteristics of SmS ceramic samples after exposure to a pulsed magnetic field

Volchkov

Baskakov

Стрелов

et al. 2022

Journal of Rare Earths

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A new type of gas sensor based on the thermovoltaic effect in zinc oxide inhomogeneously doped with mixed-valence impurities

Cited by 9 publications

References 13 publications

Investigation of Gas-Sensitive Properties of Thin-Film Thermovoltaic Sensor Elements Based on Zinc Oxide

Investigation of Gas-Sensitive Properties of Thin-Film Thermovoltaic Sensor Elements Based on Zinc Oxide

Principles of Creating a Virtual Multi-Sensor System for Recognition Gas Mixtures

Thermoelectric and electrical characteristics of SmS ceramic samples after exposure to a pulsed magnetic field

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