Journal ArticleDOI
Strategies to enhance the carbon monoxide sensitivity of tin oxide thin films
TLDR
In this article, the electrical response of SnO 2 thin film as a function of thickness was studied in order to determine the optimum of this parameter to detect carbon monoxide, finding out that thickness around 200nm showed the highest response Structural characteristics of tin oxide such as grain size and net distortions were also analysed On the other hand, a study of two catalytic metals (Pt and Pd) and their influence on sensing parameters was also carried out Tests under controlled atmospheres and XPS analyses showed that the doping technique that provided a suitable quantity and doping profile of metal for COAbstract:
In this work electrical response of SnO 2 thin film as a function of thickness was studied in order to determine the optimum of this parameter to detect carbon monoxide, finding out that thickness around 200 nm showed the highest response Structural characteristics of tin oxide such as grain size and net distortions were also analysed On the other hand, a study of two catalytic metals (Pt and Pd) and their influence on sensing parameters was also carried out Tests under controlled atmospheres and XPS analyses showed that the doping technique that provided a suitable quantity and doping profile of metal for CO detection was the so called “buried layer” when Pt was used as catalyst Therefore, a deeper study of the latter film was performed, in order to establish some of its electrical characteristics, moisture influence on response and long-term stabilityread more
Citations
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Journal ArticleDOI
Metal oxide-based gas sensor research: How to?
TL;DR: In this article, the state of the art in the field of experimental techniques possible to be applied to the study of conductometric gas sensors based on semiconducting metal oxides is reviewed.
Journal ArticleDOI
The role of morphology and crystallographic structure of metal oxides in response of conductometric-type gas sensors
TL;DR: In this article, the influence of morphology and crystallographic structure on gas-sensing characteristics of metal oxide conductometric-type sensors have been analyzed, and it was concluded that the structural parameters of metal oxides are important factors for controlling response parameters of resistive type gas sensors.
Journal ArticleDOI
Instability of metal oxide-based conductometric gas sensors and approaches to stability improvement (short survey)
Ghenadii Korotcenkov,Beongki Cho +1 more
TL;DR: In this paper, modern views on the reasons of time instability of gas sensors parameters, as well as approaches which could be used for the improvement of this important sensor's parameter, are summarized.
Journal ArticleDOI
High-performance gas sensor based on ZnO nanowires functionalized by Au nanoparticles
TL;DR: In this paper, a high performance gas sensor based on Au-functionalized ZnO nanorods was fabricated, where Au nanoparticles were successfully immobilized onto the surface of ZnOs to serve as a sensitizer by a facile solution reduction process.
Journal ArticleDOI
NO2 sensing performance of SnO2 hollow-sphere sensor
Jun Zhang,Shurong Wang,Yanmei Wang,Yan Wang,Baolin Zhu,Huijuan Xia,Xianzhi Guo,Shoumin Zhang,Weiping Huang,Shihua Wu +9 more
TL;DR: In this article, the authors examined the possibility of using SnO 2 hollow spheres mediated by carbon microspheres for the efficient detection of NO 2 gas, and found that the sensors were more sensitive to NO 2 than to ethanol, methanol, gasoline, acetone, CCl 4 and NH 3 when operated at 160°C.
References
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Micromachined metal oxide gas sensors: opportunities to improve sensor performance
TL;DR: In this article, a review of the design principles and technology involved in the fabrication of micromachined substrates examining thermal and mechanical aspects is presented, and various ways for extracting the information are presented with respect to the improvement of sensor performance brought by this new approach.
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Recent developments in semiconducting thin-film gas sensors
TL;DR: A critical review of thin-film semiconducting materials that are used as gas sensors is presented in this paper, which can be approximately divided into two main groups: the first includes sensors that detect oxygen with variations of bulk or surface conductance; the second comprises all the materials that detect oxidizing and reducing gases in air at constant oxygen partial.
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Gas sensing properties of tin oxide thin films fabricated from hydrothermally treated nanoparticles: Dependence of CO and H2 response on film thickness
TL;DR: In this article, the relationship between gas sensing properties and film thickness was discussed on the basis of diffusivity and reactivity of the gases inside the oxide films, and it was found that the sensor response to H2 similarly decreased with an increase in film thickness.
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Classical and novel techniques for the preparation of SnO2 thin-film gas sensors☆
TL;DR: A review of the different thin-film techniques for growing tin oxide gas sensors is presented in this article, where a new deposition method with the acronym RGTO (rheotaxial growth and thermal oxidation) is described in detail with regard to the preparation parameters.
Journal ArticleDOI
The mechanism of the interaction between CO and an SnO2 surface: the role of water vapour
N. Bârsan,R. Ionescu +1 more
TL;DR: In this paper, a model for the interaction between CO and an SnO 2 surface, which takes into account the role of water vapour, is presented, supported by literature data.