ZnO nanoarchitectures: Ultrahigh sensitive room temperature acetaldehyde sensor

Mani, Ganesh Kumar; Rayappan, John Bosco Balaguru

doi:10.1016/j.snb.2015.09.103

Cited by 87 publications

(65 citation statements)

References 45 publications

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“…In addition, the initial resistance of the pristine, Ni, and Cu-doped ZnO sensors were lower than the Co-doped ZnO gas sensor. Since a higher number of electrons was presented on the surface of the Co-doped ZnO sensor than the other sensors, the change in the width of the electron-depletion layer during the exposure to acetaldehyde was higher than the other sensors [26].…”

Section: Doped Nanostructure As Acetaldehyde Gas Sensorsmentioning

confidence: 81%

“…In addition, the initial resistance of the Transition metal dopants such as Cr, Co, Ni, and Cu have good potential for oxygen adsorption as well as good catalytic activity to different VOCs [80][81][82]. In an interesting study, pristine and Co-, Ni-, and Cu-doped ZnO nanostructures were realized by a chemical spray pyrolysis method [26]. The sensing response to 10 ppm acetaldehyde was 2.85, 800, 2.59, and 21.36 for the pristine and Co-, Ni-, and Cu-doped ZnO-based gas sensors, respectively.…”

Section: Doped Nanostructure As Acetaldehyde Gas Sensorsmentioning

confidence: 99%

“…Accordingly, it can cause mental illness, visual disturbances, and poor memory in human beings. To avoid such problems, 100 ppm as a permissible exposure limit of acetaldehyde has been proposed [26].…”

Section: Introductionmentioning

confidence: 99%

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Nanostructured Semiconducting Metal Oxide Gas Sensors for Acetaldehyde Detection

Mirzaei

Kim

et al. 2019

Chemosensors

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Volatile organic compounds (VOCs) are among the most abundant air pollutants. Their high concentrations can adversely affect the human body, and therefore, early detection of VOCs is of outmost importance. Among the different VOCs, in this review paper we have focused our attention to the monitoring of acetaldehyde by chemiresistive gas sensors fabricated from nanostructured semiconducting metal oxides. These sensors can not only provide a high sensing signal for detection of acetaldehyde but also high thermal and mechanical stability along with a low price. This review paper is divided into three major sections. First, we will introduce acetaldehyde as an important VOC and the importance of its detection. Then, the fundamentals of chemiresistive gas sensors will be briefly presented, and in the last section, a survey of the literature on acetaldehyde gas sensors will be presented. The working mechanism of acetaldehyde sensors, their structures, and configurations are reviewed. Finally, the future development outlook and potential applications are discussed, giving a complete panoramic view for researchers working and interested in acetaldehyde detection for different purposes in many fundamental and applicative fields.

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Section: Doped Nanostructure As Acetaldehyde Gas Sensorsmentioning

confidence: 81%

Section: Doped Nanostructure As Acetaldehyde Gas Sensorsmentioning

confidence: 99%

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Nanostructured Semiconducting Metal Oxide Gas Sensors for Acetaldehyde Detection

Mirzaei

Kim

et al. 2019

Chemosensors

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“…Moreover, the observed peaks confirmed the formation of zinc oxide nanodiscs with hexagonal wurtzite crystal structure and it is in agreement with JCPDS card number 36-1451. 24 The average crystallite size was estimated using Scherrer's formula 25 and found to be 44 nm. Further, zinc oxide nanodiscs were analyzed through XPS to gain information about surface composition and chemical states.…”

Section: Resultsmentioning

confidence: 99%

Zinc oxide surface: a versatile nanoplatform for solvent-free synthesis of diverse isatin derivatives

Kothandapani

Ganesan

Mani

et al. 2016

Tetrahedron Letters

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“…All of these can get chemisorbed at the grain boundaries, specifically during the postgrowth cool down, where films are exposed to the atmosphere within the spray pyrolysis chamber. The chemisorption and desorption of such oxygen species has been previously studied as a function of temperature as well as on the metal oxide [44][45][46]. For temperatures below 100 • C, O − 2 gets chemisorbed on the surface, at temperatures between 100 • C and 300 • C O − species becomes dominant, and for temperatures higher than 300 • C the probability for chemisorption of O −− becomes very high.…”

Section: A Nitrogen Annealingmentioning

confidence: 99%

Nitrogen grain-boundary passivation of In-doped ZnO transparent conducting oxide

Ali

Butt

Coughlan

et al. 2018

Phys. Rev. Materials

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We have investigated the properties and conduction limitations of spray pyrolysis grown, low-cost transparent conducting oxide ZnO thin films doped with indium. We analyze the optical, electrical, and crystallographic properties as functions of In content with a specific focus on postgrowth heat treatment of these thin films at 320 • C in an inert, nitrogen atmosphere, which improves the films electrical properties considerably. The effect was found to be dominated by nitrogen-induced grain-boundary passivation, identified by a combined study using in situ resistance measurement upon annealing, x-ray photoelectron spectroscopy, photoluminescence, and x-ray diffraction studies. We also highlight the chemical mechanism of morphologic and crystallographic changes found in films with high indium content. By optimizing growth conditions according to these findings, ZnO:In with a resistivity as low as 2 × 10 −3 cm, high optical quality (T ≈ 90%), and sheet resistance of 32 / has been obtained without any need for postgrowth treatments.

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ZnO nanoarchitectures: Ultrahigh sensitive room temperature acetaldehyde sensor

Cited by 87 publications

References 45 publications

Nanostructured Semiconducting Metal Oxide Gas Sensors for Acetaldehyde Detection

Nanostructured Semiconducting Metal Oxide Gas Sensors for Acetaldehyde Detection

Zinc oxide surface: a versatile nanoplatform for solvent-free synthesis of diverse isatin derivatives

Nitrogen grain-boundary passivation of In-doped ZnO transparent conducting oxide

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