High-performance ZnO nanoflake moisture sensor

Bu, Ian Y.Y.; Yanɡ, Chao

doi:10.1016/j.spmi.2012.03.009

Cited by 60 publications

(29 citation statements)

References 24 publications

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“…The relatively low responses observed towards these gases were attributed to insufficient thermal energy at room temperature, which favors the response to humidity, therefore resulting in a high selectivity. Bu and Yang [98] synthesized, directly on a glass substrate, ZnO nanoflakes by a solvothermal method followed by an annealing at 550 °C for the complete transformation of zinc acetate precursors to zinc oxide. ZnO nanoflakes were approximately 1-2 µ m in diameter and tilted on the glass substrate, providing a good coverage without visible voids.…”

Section: Humiditymentioning

confidence: 99%

Two-Dimensional Zinc Oxide Nanostructures for Gas Sensor Applications

Leonardi

2017

Chemosensors

159

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Two-dimensional (2D) nanomaterials, due to their unique physical and chemical properties, are showing great potential in catalysis and electronic/optoelectronic devices. Moreover, thanks to the high surface to volume ratio, 2D materials provide a large specific surface area for the adsorption of molecules, making them efficient in chemical sensing applications. ZnO, owing to its many advantages such as high sensitivity, stability, and low cost, has been one of the most investigated materials for gas sensing. Many ZnO nanostructures have been used to fabricate efficient gas sensors for the detection of various hazardous and toxic gases. This review summarizes most of the research articles focused on the investigation of 2D ZnO structures including nanosheets, nanowalls, nanoflakes, nanoplates, nanodisks, and hierarchically assembled nanostructures as a sensitive material for conductometric gas sensors. The synthesis of the materials and the sensing performances such as sensitivity, selectivity, response, and recovery times as well as the main influencing factors are summarized for each work. Moreover, the effect of mainly exposed crystal facets of the nanostructures on sensitivity towards different gases is also discussed.

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Section: Humiditymentioning

confidence: 99%

Two-Dimensional Zinc Oxide Nanostructures for Gas Sensor Applications

Leonardi

2017

Chemosensors

159

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“…It has attracted increasing attentions due to its potential application in a variety of fields. In particular, ZnO has been proposed as an active material in electronic devices [1], ultraviolet light emitting diodes [2], transparent conductive films [3,4], piezoelectric devices [5], gas sensor [6][7][8], solar energy cells [9][10][11] and photodetectors [12,13]. It is well known that the optoelectronic properties can be adjusted by doping appropriate dopants into ZnO and the defects in ZnO can lead to an emission band between 420 and 700 nm, which can generate white light.…”

Section: Introductionmentioning

confidence: 99%

Microstructure, surface morphology and optical properties of Na x Cu y Zn1−x−y O thin films

Zhao

et al. 2015

J Mater Sci: Mater Electron

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Na x Cu y Zn 1-x-y O thin films were prepared by sol-gel method on quartz glass. The effect of Na (or Cu) doping on the microstructure, surface morphology, optical properties of the thin films was investigated. The Na 0.1 Cu 0.01 Zn 0.89 O thin film has the largest average grain size and the best preferential c-axis orientation, which may be attributed to the difference in ionic radius between Zn and Na (or Cu). The Na 0.1 Cu 0.01 Zn 0.89 O thin film also presents denser morphology with little voids and the smallest optical band gap, which may be attributed to band edge bending and the larger grain size. The largest intensity of A 1 (LO) modes may be due to the major structural defect concentrations. The quenching of UV and visible emissions, which may be attributed to the increase of non-radiative recombination transition, has been observed in the Na 0.1 Cu 0.01 Zn 0.89 O and Na 0.1-Cu 0.02 Zn 0.88 O thin films.

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“…In particular, ZnO has been proposed as an active material in ultraviolet light emitting diodes(LEDs) [5], transparent conductive films [6][7][8], piezoelectric nano-generators [9] and humidity gas sensors [10]. It is well-known that the optoelectronic properties of ZnO can be further tuned by adding the appropriate dopants into its network.…”

Section: Introductionmentioning

confidence: 99%

Effect of Cu concentration on the structural and optoelectronic properties of ZnO:Cu:Al prepared by the sol–gel deposition method

2015

Ceramics International

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High-performance ZnO nanoflake moisture sensor

Cited by 60 publications

References 24 publications

Two-Dimensional Zinc Oxide Nanostructures for Gas Sensor Applications

Two-Dimensional Zinc Oxide Nanostructures for Gas Sensor Applications

Microstructure, surface morphology and optical properties of Na x Cu y Zn1−x−y O thin films

Effect of Cu concentration on the structural and optoelectronic properties of ZnO:Cu:Al prepared by the sol–gel deposition method

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