Formulation and characterization of ZnO:Sb thick-film gas sensors

Dayan, Nir; Sainkar, S. R.; Karekar, R.N.; Aiyer, R. C.

doi:10.1016/s0040-6090(98)00501-x

Cited by 236 publications

(99 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…4 (a), the as-synthesized nanoparticles were about 5 nm in diameter. This is in agreement with what has been previously reported [25,26]. SEM images of samples annealed at 450C, see …”

Section: Sem Tem and Afm Imagingsupporting

confidence: 93%

ZnO nanoparticles or ZnO films: A comparison of the gas sensing capabilities

Eriksson

Khranovskyy

Söderlind

et al. 2009

Sensors and Actuators B: Chemical

View full text Add to dashboard Cite

Zinc oxide is an interesting material for bio and chemical sensors. It is a semiconducting metal oxide with potential as an integrated multisensing sensor platform, which simultaneously detects parameters like change in field effect, mass and surface resistivity. In this investigation we have used resistive sensor measurements with respect to oxygen sensitivity in order to characterize sensing layers based on electrochemically produced ZnO nanoparticles and PE-MOCVD grown ZnO films. Proper annealing procedures were developed in order to get stable sensing properties and the oxygen sensitivity towards operation temperature was investigated. The ZnO nanoparticles showed a considerably increased response to oxygen as compared to the films. Preliminary investigations were also performed regarding the response to other gases present in car exhausts or flue gases.

show abstract

“…4 (a), the as-synthesized nanoparticles were about 5 nm in diameter. This is in agreement with what has been previously reported [25,26]. SEM images of samples annealed at 450C, see …”

Section: Sem Tem and Afm Imagingsupporting

confidence: 93%

ZnO nanoparticles or ZnO films: A comparison of the gas sensing capabilities

Eriksson

Khranovskyy

Söderlind

et al. 2009

Sensors and Actuators B: Chemical

View full text Add to dashboard Cite

show abstract

“…These properties have led to multiple applications of ZnO in various technological areas, such as optoelectronics, cosmetology, medicine, and industry [1,2]. In addition, ZnO is a low toxicity, biocompatible and biodegradable material; these properties make possible its use in photocatalysis for water treatment [3].…”

Section: Introductionmentioning

confidence: 99%

“…In most synthesis techniques a considerable number of variables should be considered, and the evaluation of the effect of each on the final product would require a very large number of experiments. Taguchi's method proposes a statistical experimental design that limits the number of experiments, according to the number of variables and their values (levels) to be analyzed, evaluating the effect of the variables and their magnitudes on the response of interest [1,2,[16][17][18][19][20]. This statistical method is commonly applied in robust processes and allows decreasing the complexity of an experimental design, compared to other conventional techniques [19].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of ZnO Nanopowders by the Homogeneous Precipitation Method: Use of Taguchi’s Method for Analyzing the Effect of Different Variables

Herrera-Rivera

Olvera

Maldonado

2017

Journal of Nanomaterials

View full text Add to dashboard Cite

In the present work the effect of different factors in the synthesis of ZnO powders by the homogeneous precipitation method is analyzed. A robust statistical technique, Taguchi's method, was used to reduce the experiments number. The variables studied were precursor, solvent and precipitating agent type, Zn molar concentration, percentage of saturation, speed and time of agitation, and temperature of synthesis. In order to optimize the particle size, an experimental design of 18 trials was proposed, according to L 18 Taguchi array. Structural and morphological properties were characterized by X-ray diffraction (XRD) and scanning and transmission electron microscopy techniques (SEM and TEM). The estimated crystallite size in synthesized samples ranged from 32 to 57 nm. The morphologies obtained presented several forms, such as spheres, wires, flowers, bars, and tetrahedrons, with a particle size variation of 35 to 165 nm. In this work it is shown that using a statistical experimental design leads us to a fast and reliable optimization of the synthesis parameters for obtaining small size ZnO nanoparticles, thus optimizing time and human and materials resources.

show abstract

“…In general, oxygen-related gas-sensing mechanisms involve chemisorptions of oxygen on the oxide surface followed by charge transfer during the reaction between chemisorbed oxygen-reducing and targetgas molecules. To reveal the mechanism of gas sensors, many models, such as the point-contact model, 28 face-contact model, 29 and surface-depletion model, 2,3,30 have been established. These models emphasize the importance of charge transfer in the sensing mechanism.…”

mentioning

confidence: 99%