Nanopatterned polycrystalline ZnO for room temperature gas sensing

Fan, Shan; Srivastava, Arvind K.; Dravid, Vinayak P.

doi:10.1016/j.snb.2009.10.054

Cited by 84 publications

(50 citation statements)

References 26 publications

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“…The sensitivity of the ZnO nanostructures grown for 20 min was found to increase with the operating time as the NO 2 was introduced; then decreased rapidly as the NO 2 was turned off. The higher sensitivity observed for this film is probably due to a high surface-to-volume ratio associated with nanoparticulate materials [7,23,60]. Liau et al [61] reported that thinner ZnO nanorods exhibit better sensing performance than thicker ZnO nanorods, due to larger effective surface area of thinner ZnO nanorods, resulting in a larger quantity of adsorbed oxygen molecules.…”

Section: Gas Sensing Propertiesmentioning

confidence: 93%

“…However, the sensing temperature of ZnO nanostructures is relatively high (usually higher than 300 C) and their sensitivity needs to be further enhanced for practical application at the industrial level as well as for commercial purpose. To decrease the operating temperature, the feasible approaches include doping the metal oxide with noble metals [22] and using UV radiation [23]. The role of dopants during gas sensing in this case is to control operation temperature and improve the sensitivity by providing much room for reaction to take place at the surface.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A study on the sensing of NO2 and O2 utilizing ZnO films grown by aerosol spray pyrolysis

Mhlongo

Motaung

Kortidis

et al. 2015

Materials Chemistry and Physics

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Section: Gas Sensing Propertiesmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

A study on the sensing of NO2 and O2 utilizing ZnO films grown by aerosol spray pyrolysis

Mhlongo

Motaung

Kortidis

et al. 2015

Materials Chemistry and Physics

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“…Chen et al, 2012;Della Gaspera et al, 2010;Gong, Li, Hu, Zhou, & Deng, 2010). Fan, Srivastava, & Dravid, 2010), Nano-belts (Sadek, Wlodarski, Kalantar-Zadeh, & Choopun, 2005), Nano-needles (Pawar, Lee, Patil, & Lee, 2013), Nano-prism (Hjiri, El Mir, Leonardi, Donato, & Neri, 2013), nanotubes (J. Wang, Sun, Yang, & Wu, 2009), Nano/micro-flowers (Bai, Guo, et al, 2013;Rai, Raj, Ko, Park, & Yu, 2013), quantum dots (Bai, Hu, et al, 2011;D.…”

Section: Zno Gas Sensors 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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“…Moreover, high temperature operation could lead to the long-term reliability problem due to the growth of the oxide grain. A range of techniques such as doping of novel metals, [10][11][12] MEMS fabrication, 13 nanosensing materials, 14 application of electrostatic field, 15 and ultraviolet (UV) irradiation [16][17][18][19][20][21][22][23][24] have been developed to reduce the operating temperature. Of these techniques, UV irradiation has attracted increasing attention as a promising strategy.…”

Section: Introductionmentioning

confidence: 99%

“…Since Camagni et al's report on UV-enhanced semiconducting oxide sensors, 12 many researchers have reported that UV irradiation improved the sensing performances of semiconducting oxide gas sensors. [16][17][18][19][20][21][22][23] On the other hand, there is almost no report on the gas sensing properties of one-dimensional nanostructures functionalized with metal catalyst under UV illumination. This study examined the NO 2 gas sensing properties of networked Pt-functionalized Ga 2 O 3 nanorods at room temperature under UV illumination to see the possibility of the practical use of Ga 2 O 3 -based gas sensors at room temperature.…”

Section: Introductionmentioning

confidence: 99%

UV Enhanced NO₂Sensing Properties of Pt Functionalized Ga₂O₃Nanorods

An¹,

Park²,

Mun³

et al. 2013

Bulletin of the Korean Chemical Society

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Ga2O3 one-dimensional (1D) nanostructures were synthesized by using a thermal evaporation technique. The morphology, crystal structure, and sensing properties of the Ga2O3 nanostructures functionalized with Pt to NO2 gas at room temperature under UV irradiation were examined. The diameters of the 1D nanostructures ranged from a few tens to a few hundreds of nanometers and the lengths ranged up to a few hundreds of micrometers. Pt nanoparticles with diameters of a few tens of nanometers were distributed around a Ga2O3 nanorod. The responses of the nanorods gas sensors fabricated from multiple networked Ga2O3 nanorods were improved 3-4 fold at NO2 concentrations ranging from 1 to 5 ppm by Pt functionalization. The Pt-functionalized Ga2O3 nanorod gas sensors showed a remarkably enhanced response at room temperature under ultraviolet (UV) light illumination. In addition, the mechanisms via which the gas sensing properties of Ga2O3 nanorods are enhanced by Pt functionalization and UV irradiation are discussed.

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Nanopatterned polycrystalline ZnO for room temperature gas sensing

Cited by 84 publications

References 26 publications

A study on the sensing of NO2 and O2 utilizing ZnO films grown by aerosol spray pyrolysis

A study on the sensing of NO2 and O2 utilizing ZnO films grown by aerosol spray pyrolysis

The Review of Semiconductor Gas Sensor for Nox Detcting

UV Enhanced NO₂Sensing Properties of Pt Functionalized Ga₂O₃Nanorods

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Nanopatterned polycrystalline ZnO for room temperature gas sensing

Cited by 84 publications

References 26 publications

A study on the sensing of NO2 and O2 utilizing ZnO films grown by aerosol spray pyrolysis

A study on the sensing of NO2 and O2 utilizing ZnO films grown by aerosol spray pyrolysis

The Review of Semiconductor Gas Sensor for Nox Detcting

UV Enhanced NO2Sensing Properties of Pt Functionalized Ga2O3Nanorods

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UV Enhanced NO₂Sensing Properties of Pt Functionalized Ga₂O₃Nanorods