Gas-sensing properties of sprayed films of (CdO)/sub x/(ZnO)/sub 1-x/ mixed oxide

Ferro, R.; Rodríguez, J.A.; Jiménez, I.; Cirera, A.; Cerdá, J.; Morante, J.R.

doi:10.1109/jsen.2004.838664

Cited by 42 publications

(14 citation statements)

References 21 publications

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“…Tricoli, A. Teleki, and M. Righettoni Reviews Table 2: Gas-sensing films of different materials produced by the dry methods presented in [195][196][197] SP ZnO 12-400 50-500 Al, CdO, La Act, C 4 H 10 , CO, EtOH, MeOH, NO 2 [157,[198][199][200][201] [a] Synthesis method: for abbreviations please see Table 1. If grain sizes were not reported, crystallite sizes are listed.…”

Section: Crystallinity and Grain Sizementioning

confidence: 99%

Semiconductor Gas Sensors: Dry Synthesis and Application

2010

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Since the development of the first chemoresistive metal oxide based gas sensors, transducers with innovative properties have been prepared by a variety of wet- and dry-deposition methods. Among these, direct assembly of nanostructured films from the gas phase promises simple fabrication and control and with the appropriate synthesis and deposition methods nm to μm thick films, can be prepared. Dense structures are achieved by tuning chemical or vapor deposition methods whereas particulate films are obtained by deposition of airborne, mono- or polydisperse, aggregated or agglomerated nanoparticles. Innovative materials in non-equilibrium or sub-stoichiometric states are captured by rapid cooling during their synthesis. This Review presents some of the most common chemical and vapor-deposition methods for the synthesis of semiconductor metal oxide based detectors for chemical gas sensors. In addition, the synthesis of highly porous films by novel aerosol methods is discussed. A direct comparison of structural and chemical properties with sensing performance is given.

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Section: Crystallinity and Grain Sizementioning

confidence: 99%

Semiconductor Gas Sensors: Dry Synthesis and Application

2010

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“…Nowadays, the science community focuses on investigation of different combination of metal oxides in order to achieve fine tune of response time and selectivity of gas sensors (Bai et al, 2010;Barsan, Schweizer-Berberich, & Göpel, 1999;I. Chen et al, 2010;Comini et al, 2002;Ferro et al, 2005;Galatsis et al, 2002;I.-S. Hwang et al, 2010;Jiao, Wu, Qin, et al, 2003;D.-S. Lee, Han, Lee, Huh, & Lee, 2000;Liangyuan et al, 2008;Lin, Fang, Lin, Tunney, & Ho, 2010;Geyu Lu et al, 2012;J.-A. Park et al, 2010;Sharma, Tomar, & Gupta, 2012;Vijayalakshmi et al, 2011;Shiyou Xu & Shi, 2009;Yoon & Kim, 2011).…”

Section: Mixed Metal Oxides For No X Detectingmentioning

confidence: 99%

“…(Fleischer, Seth, Kohl, & Meixner, 1996) 22 CdO-ZnO Thin Film spray pyrolysis 100-330 3-300 (ppm) --- (Ferro et al, 2005) OTHER MATERIALS FOR NO x DETECTING Up to this section some kinds of materials are presented, but many attempts are done on the other oxides to detect low concentration of NO x gases up to now, which involve phthalocyanine coupled with SAW devices, nanotubes and high temperature superconducting oxides. The semiconductor gas sensors must often be of low cost and have high stability in all environments.…”

Section: Mixed Metal Oxides For No X Detectingmentioning

confidence: 99%

The Review of Semiconductor Gas Sensor for Nox Detcting

Niyat¹,

Hadi²,

Abadi³

2016

TOJDAC

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During the last century, many semiconductor gas sensors have been presented based on various materials and technologies to detect gas components. Many of them are made to support human's life in different ways. In the last years, the number of sensors which can detect various gas species has increased dramatically especially with respect to global issues of environment and earth atmosphere, the necessity of those gas sensors which can detect air pollutants such as NO x gases in environment is felt. They are essentially required in order to control the systems of combustion exhausted from industry, stationary facilities and automobiles. So it is necessary for the scientists to design and fabricate the gas sensors which are of low cost, selective, sensitive, and accurate especially in low level concentrations of target gases, easy to process and of high recovery and response time, good electrical properties, and above all tunable structure at the nano scale. In this sense, this paper has presented various classifications of gas sensors and various semiconductor oxides for NO x detecting and their technology to convey a comprehensive idea about the semiconductor metals as well as metal oxides for NO x detecting along with their characteristics, structures etc. in order to clarify the future road map towards on the semiconductor materials for NO x detecting. Keywords: sensor, NO x gases, semiconductor, metal oxides INTRODUCTIONIn the last few decades, many studies have been focused on the semiconducting metal oxides which are known as effective gas sensing materials especially for NO x detecting due to their electrical conductivities which are open to change greatly with the changes of atmosphere (K. J. Choi & Jang, 2010;Comini et al., 2009;Fine, Cavanagh, Afonja, & Binions, 2010;Franke, Koplin, & Simon, 2006; Kanan, El-Kadri, Abu-Yousef, & Kanan, 2009; G Korotcenkov & Cho, 2011;J.-H. Lee, 2009;Tricoli, Righettoni, & Teleki, 2010;Wetchakun et al., 2011). The sensing characteristics of such sensors can be optimized by controlling their morphology, surface to volume ratio, and electrical properties. The developments in nanotechnology, fabrication methods, and synthesis provide a suitable atmosphere to construct those sensors with their mentioned sensing characteristics easier.

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“…For 30minutes comparatively thick CdO surface layer formed having less oxygen vacancies and hence sensing surface should be compact increasing barrier height intragranular region and sensitivity decreased. [29][30][31][32][33].…”

Section: E Gas Sensing Mechanismmentioning

confidence: 99%

Studies on gas sensing performance of pure and surface modified ZrO<inf>2</inf> thick film resistor

Deshmukh

Jain²,

Patil

2011

2011 Fifth International Conference on Sensing Technology

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In this work, thick films of pure ZrO 2 powder were prepared by screen printing technique. The material was characterized by XRD, SEM, EDAX and UV spectroscopy Techniques. X-Ray Diffraction studies confirmed that the combinations of tetragonal and monoclinic structure. The gas sensing performances of various gases were tested. The thick films showed highest response toNH 3 (100 ppm) at 300 0 C. The film was modified by dipping in 0.1M CdCl 2 solution for the time intervals of 5, 10, 20 and 30 minutes and surface morphology was observed by SEM technique. The sensitivity and selectivity to different gases was tested and first time it was investigated that the film showed highest response to H 2 S gas at operating temperature 300 0 C by dipping technique. The sensitivity and selectivity may be further enhanced by Cd doping. The quick response and fast recovery time was recorded.

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Gas-sensing properties of sprayed films of (CdO)/sub x/(ZnO)/sub 1-x/ mixed oxide

Cited by 42 publications

References 21 publications

Semiconductor Gas Sensors: Dry Synthesis and Application

Semiconductor Gas Sensors: Dry Synthesis and Application

The Review of Semiconductor Gas Sensor for Nox Detcting

Studies on gas sensing performance of pure and surface modified ZrO<inf>2</inf> thick film resistor

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