Growth of ZnO tetrapods for nanostructure-based gas sensors

Calestani, Davide; Zha, M.; Mosca, R.; Zappettini, A.; Carotta, M.C.; Natale, V. di; Zanotti, L.

doi:10.1016/j.snb.2009.11.009

Cited by 183 publications

(97 citation statements)

References 64 publications

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“…For example, ZnO tetrapods synthesized at 700°C have a response of 20 to 20 ppm NO 2 at 300°C. 7 Branched ZnO nanowires synthesized by two-step thermal evaporation processes at 950°C have a response of 2.06 to 5 ppm NO 2 at 300°C. 8 Crystalline ZnO nanocombs synthesized by chemical vapor deposition (CVD) at 700°C have a response of more than 100 to 5 ppm NO 2 at 200°C.…”

Section: Introductionmentioning

confidence: 99%

Comparison of NO2 Gas-Sensing Properties of Three Different ZnO Nanostructures Synthesized by On-Chip Low-Temperature Hydrothermal Growth

Jiao

Duy

Trung

et al. 2017

Journal of Elec Materi

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Three different ZnO nanostructures, dense nanorods, dense nanowires, and sparse nanowires, were synthesized between Pt electrodes by on-chip hydrothermal growth at 90°C and below. The three nanostructures were characterized by scanning electron microscopy and x-ray diffraction to identify their morphologies and crystal structures. The three ZnO nanostructures were confirmed to have the same crystal type, but their dimensions and densities differed. The NO 2 gas-sensing performance of the three ZnO nanostructures was investigated at different operation temperatures. ZnO nanorods had the lowest response to NO 2 along with the longest response/recovery time, whereas sparse ZnO nanowires had the highest response to NO 2 and the shortest response/recovery time. Sparse ZnO nanowires also performed best at 300°C and still work well and fast at 200°C. The current-voltage curves of the three ZnO nanostructures were obtained at various temperatures, and the results clearly showed that sparse ZnO nanowires did not have the linear characteristics of the others. Analysis of this phenomenon in connection with the highly sensitive behavior of sparse ZnO nanowires is also presented.

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Section: Introductionmentioning

confidence: 99%

Comparison of NO2 Gas-Sensing Properties of Three Different ZnO Nanostructures Synthesized by On-Chip Low-Temperature Hydrothermal Growth

Jiao

Duy

Trung

et al. 2017

Journal of Elec Materi

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“…Zinc oxide (ZnO) a wide band gap semiconductor has found a wide range of applications like spintronics, 1 surface acoustic wave devices, 2 acoustic sensors, 3 gas sensors, 4 UV-detector 5 and UV-lasers. 6 In the past few years, ZnO has become an extensively studied material for biosensing applications due to its unique properties like high catalytic efficiency, strong adsorption ability, bio-compatibility and high isoelectric point (IEP ∼9.5).…”

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confidence: 99%

Al and Fe co-doped transparent conducting ZnO thin film for mediator-less biosensing application

Saha

Gupta

2011

AIP Advances

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Highly c-axis oriented Al and Fe co-doped ZnO (ZAF) thin film is prepared by pulsed laser deposition. Fe introduces redox centre along with shallow donor level while Al doping enhances conductivity of ZnO, thus removing the requirement of both mediator and bottom conducting layer in bioelectrode. Model enzyme (glucose oxidase), was immobilized on surface of ZAF matrix. Cyclic voltammetry and photometric assay show that prepared bio-electrode is sensitive to glucose concentration with enhanced response of 0.18 μAmM-1cm-2 and low Km ∼ 2.01 mM. The results illustrate that ZAF is an attractive matrix for realization of miniaturized mediator-less solid state biosensor

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“…Li et al, 2012;Shouli et al, 2011), nanoparticles (F. Fan et al, 2013;Jun et al, 2009;Kolekar, Bandgar, Shirguppikar, & Ganachari, 2013;, Nano/microspheres (J. Zhang, S. Wang, Y. Wang, M. Xu, et al, 2009), Nano-films, plates and sheets (Bai, Sun, et al, 2013;Chougule, Sen, & Patil, 2012;, Nano-pyramids (Ahmad, Chang, Ahmad, Waclawik, & Wlodarski, 2013) and nanotetrapods (Calestani et al, 2010). These previous materials have been widely investigated and applied for gas sensing which are operating under the operating condition such as high electron mobility, high-specific surface area, non-toxic nature, good thermal and chemical stability (Hackenberg et al, 2013;Xie, He, Irwin, Jin, & Shi, 2011).…”

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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Growth of ZnO tetrapods for nanostructure-based gas sensors

Cited by 183 publications

References 64 publications

Comparison of NO2 Gas-Sensing Properties of Three Different ZnO Nanostructures Synthesized by On-Chip Low-Temperature Hydrothermal Growth

Comparison of NO2 Gas-Sensing Properties of Three Different ZnO Nanostructures Synthesized by On-Chip Low-Temperature Hydrothermal Growth

Al and Fe co-doped transparent conducting ZnO thin film for mediator-less biosensing application

The Review of Semiconductor Gas Sensor for Nox Detcting

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