Grain size control in nanocrystalline In2O3 semiconductor gas sensors

Gurlo, Aleksander; Ivanovskaya, M. I.; Bârsan, Nicolae; Schweizer-Berberich, M.; Weimar, Udo; Göpel, Wolfgang; Diéguez, Ángel

doi:10.1016/s0925-4005(97)00199-8

Cited by 248 publications

(107 citation statements)

References 9 publications

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“…It is in fact well recognized that by reducing the particle size of the sensing material in the nanometer range the sensitivity of chemoresistive gas sensors is greatly improved both for the large specific surface offered and for the influence in reducing the surface charge density [21,[28][29][30][31][32][33][34][35]. Furthermore, in this size range, a large fraction of the atoms (up to 50%) are present at the surface or the interface region; therefore, the chemical and electronic of nanoparticles are different from those of the bulk, consequently contributing to an increase in the sensing properties.…”

Section: Sensing Materialsmentioning

confidence: 99%

First Fifty Years of Chemoresistive Gas Sensors

2015

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Abstract:The first fifty years of chemoresistive sensors for gas detection are here reviewed, focusing on the main scientific and technological innovations that have occurred in the field over the course of these years. A look at advances made in fundamental and applied research and leading to the development of actual high performance chemoresistive devices is presented. The approaches devoted to the synthesis of novel semiconducting materials with unprecedented nanostructure and gas-sensing properties have been also presented. Perspectives on new technologies and future applications of chemoresistive gas sensors have also been highlighted.

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Section: Sensing Materialsmentioning

confidence: 99%

First Fifty Years of Chemoresistive Gas Sensors

2015

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“…It was found that the grain size of the cubic In 2 O 3 increased from 28.8 to 32.3 nm, as a small quantity of ZnO was incorporated into In 2 O 3 film (r = 0.33), and decreased from 32.3 to 15.4 nm as the content of ZnO was further increased (0.33 ≤ r ≤ 0.67). It has been reported that the grain size has great influence on the sensitivity of the In 2 O 3 based NO 2 gas sensor [20], and therefore the decrease in the grain size of In 2 O 3 (0.33 ≤ r ≤ 0.67), resulted from the incorporation of ZnO, is one of the factors in enhancing the sensor response. However, as the content of ZnO was further increased (r = 1), the sensor responses at temperatures lower than 200 • C decreased, which could be due to the increase in the grain size of cubic In 2 O 3 and the change in the microstructure (see Fig.…”

Section: Gas Sensing Characteristicsmentioning

confidence: 99%

Fabrication of NOx gas sensors using In2O3–ZnO composite films

Lin

Fang

Lin

et al. 2010

Sensors and Actuators B: Chemical

110

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“…A large number of n-and p-type nano-oxides have been widely investigated for their gas-sensing properties. Among them, Sn and Fe oxides have proven superior for practical application as gas sensing materials films [9,16,17,44]. Additionally, there are various perovskites with the general formula ABO 3 , typically as SrTiO 3 and SrTi (1-x) Fe x O 3 that are promising candidates for high-temperature sensors to detect NO 2 , CO, and CH 4 , respectively [6][7][8].…”

Section: Introductionmentioning

confidence: 99%