Study of electrical characteristics of porous alumina sensors for detection of low moisture in gases

Basu, Santanu; Chatterjee, Suman; Saha, Manjushree; Bandyopadhay, Shibdas; Mistry, Kalyan Kumar; Sengupta, Kamalendu

doi:10.1016/s0925-4005(01)00872-3

Cited by 58 publications

(25 citation statements)

References 6 publications

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“…Our interest is in developing reliable, high performance ceramic materials of large surface area for humidity and gas sensing. Therefore we have revisited the use of nanoporous alumina, a topic of considerable interest since the discovery of its moisture sensitive properties almost fifty years ago [21][22][23][24][25][26][27][28][29][30][31][32].…”

Section: Introductionmentioning

confidence: 99%

Room Temperature Ammonia and Humidity Sensing Using Highly Ordered Nanoporous Alumina Films

Dickey

Varghese

Ong

et al. 2002

Sensors

130

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Abstract:The effect of pore size and uniformity on the response of nanoporous alumina, formed on aluminum thick films through an anodization process, to ammonia and humidity at room temperature is reported. Pore sizes examined range from 13 nm to 48 nm, with pore size standard deviations ranging from 2.6 nm to 7.8 nm. The response of the material to ammonia and humidity is a strong function of pore size and operating frequency. At 5 kHz an alumina sensor with an average pore size of 13.6 nm, standard deviation 2.6 nm, exhibits a factor of two change in impedance magnitude as it is cycled between an ammonia and argon environment. At 5 kHz the same sensor exhibits a well-behaved change in impedance magnitude of 10 3 over 20% to 90% relative humidity. Cole-Cole plots of the 5 Hz to 13 MHz measured impedance spectra, modeled using equivalent circuits, are used to resolve the effects of adsorption and ion migration.

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Section: Introductionmentioning

confidence: 99%

Room Temperature Ammonia and Humidity Sensing Using Highly Ordered Nanoporous Alumina Films

Dickey

Varghese

Ong

et al. 2002

Sensors

130

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“…These materials can also be used to design a capacitive humidity sensor. This type of humidity sensors show the variation in electrical resistance of a humid medium for example a conductive polymer, salt, or dried substrate [33][34][35][36][37][38]. Fig.1 show the typical characteristic of resistive humidity sensor.…”

Section: B Resistive Typementioning

confidence: 99%

Classification and Applications of Humidity Sensors: A Review

Yadav¹

2018

IJRASET

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This review introduces an overview of importance of humidity, methods of their measurement. It gives Detailed description of humidity sensors; their types and properties have been discussed. It explains role of humidity in human life and need of humidity. It also deals with the experimental techniques for the development of humidity sensors and the water adsorption mechanism. Humidity sensors such as resistive type, optical, and ceramic humidity sensors etc. have been described.

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“…For instance, highly hexagonally ordered cylindrical magnetic nanowires (NWs) have been easily prepared by their electrochemical deposition into the nanopores of anodic aluminum oxide (AAO) membranes, displaying multiple technological applications including ultrahigh-density magnetic recording media [8], sensors and optoelectronic devices [17].…”

Section: Introductionmentioning

confidence: 99%

Quantitative magnetometry analysis and structural characterization of multisegmented cobalt–nickel nanowires

Cantú-Valle

Barriga-Castro

Vega

et al. 2015

Journal of Magnetism and Magnetic Materials

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Study of electrical characteristics of porous alumina sensors for detection of low moisture in gases

Cited by 58 publications

References 6 publications

Room Temperature Ammonia and Humidity Sensing Using Highly Ordered Nanoporous Alumina Films

Room Temperature Ammonia and Humidity Sensing Using Highly Ordered Nanoporous Alumina Films

Classification and Applications of Humidity Sensors: A Review

Quantitative magnetometry analysis and structural characterization of multisegmented cobalt–nickel nanowires

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