Development of microstructure CO sensor based on hierarchically porous ZnO nanosheet thin films

Zeng, Yi; Qiao, Liang; Bing, Yifei; Wen, Mei; Bo, Zhishan; Zheng, Weitao; Zhang, Tong; Zou, Guangtian

doi:10.1016/j.snb.2012.05.090

Cited by 119 publications

(62 citation statements)

References 27 publications

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“…Then, under the assumption that the CO reacts only with surface oxygen species via an Eley-Rideal mechanism, they demonstrated that the measured resistance responses of the system are well described by the theoretical model presented (Figure 15b). Zeng et al [80] prepared a sensor based on hierarchically porous ZnO nanosheet thin films vertically grown on a silicon substrate, using a facile two-step solution phase method. In the first step, a ZnO layer was preferentially deposited by the sol-gel method on the substrate.…”

Section: Carbon Monoxidementioning

confidence: 99%

“…The Si-based sensor was achieved using a conventional photolithography process where Pt interdigital electrodes and heater were sputtered on a silicon substrate. Then, the Zeng et al [80] prepared a sensor based on hierarchically porous ZnO nanosheet thin films vertically grown on a silicon substrate, using a facile two-step solution phase method. In the first step, a ZnO layer was preferentially deposited by the sol-gel method on the substrate.…”

Section: Carbon Monoxidementioning

confidence: 99%

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Two-Dimensional Zinc Oxide Nanostructures for Gas Sensor Applications

Leonardi

2017

Chemosensors

147

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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: Carbon Monoxidementioning

confidence: 99%

Section: Carbon Monoxidementioning

confidence: 99%

Two-Dimensional Zinc Oxide Nanostructures for Gas Sensor Applications

Leonardi

2017

Chemosensors

147

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“…Besides graphene, research has also centered on gas sensors based on various 2D materials such as TMDs especially MoS2 [80][81][82][83][84][85][86][87], WS2 [88][89][90], MoSe2 [91] and phosphorene [92,93]. 2D nanostructures in the form of nanosheets (NSs), nanowalls, nanoplates, etc., made from ZnO, NiO, CuO, WO3, SnO2, etc., have also proven as successful sensing materials, which could be used as building blocks for the fabrication of gas sensors [94][95][96][97][98][99][100][101][102][103][104][105][106][107][108].…”

Section: Two-dimensional Materials For Gas Sensingmentioning

confidence: 99%

Two-Dimensional Materials for Sensing: Graphene and Beyond

Varghese²,

et al. 2015

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Two-dimensional materials have attracted great scientific attention due to their unusual and fascinating properties for use in electronics, spintronics, photovoltaics, medicine, composites, etc. Graphene, transition metal dichalcogenides such as MoS2, phosphorene, etc., which belong to the family of two-dimensional materials, have shown great promise for gas sensing applications due to their high surface-to-volume ratio, low noise and sensitivity of electronic properties to the changes in the surroundings. Two-dimensional nanostructured semiconducting metal oxide based gas sensors have also been recognized as successful gas detection devices. This review aims to provide the latest advancements in the field of gas sensors based on various two-dimensional materials with the main focus on sensor performance metrics such as sensitivity, specificity, detection limit, response time, and reversibility. Both experimental and theoretical studies on the gas sensing properties of graphene and other two-dimensional materials beyond graphene are also discussed. The article concludes with the current challenges and future prospects for two-dimensional materials in gas sensor applications. OPEN ACCESSElectronics 2015, 4 652

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“…The electrical and optical properties of n-type ZnO with wide band gap have been modified in order to improve and control the properties for successful application (Gomez and Olvera, 2006;Chu et al, 2007;Zeng et al, 2012). One of the promising modifications is doping, which could enhance the sensitivity by producing the electronic defects in the ZnO lattice.…”

Section: Introductionmentioning

confidence: 99%

“…ZnO have been prepared by means of chemical vapor deposition, sol-gel, hydrothermal, precipitation, spray pyrolysis and flame synthesis processes (Li and Haneda, 2003;Tani et al, 2004;Jung et al, 2008;Lu et al, 2009;Wang et al, 2010;Lai et al, 2011;Zeng et al, 2012). Most preparations, however, were batch modes taking a long time, and required additional process such as calcination and annealing.…”

Section: Introductionmentioning

confidence: 99%

Optical Properties of Nano–Structured ZnO : Sn Powders Prepared in a Micro Drop Fluidized Reactor

Yoo

Lím

Kang

et al. 2017

J. Chem. Eng. Japan / JCEJ

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Optical properties of nano-structured ZnO : Sn powders prepared by means of a one-step micro drop uidized reactor continuously were investigated. The band-gap edge of ZnO : Sn powder was extended to the visible region due to the formation of the extrinsic levels of interstitial oxygen and oxygen vacancy in the band structure of ZnO. The BET surface area of ZnO : Sn powders increased by up to 300%. The uidization of micro drops of precursors during thermal decomposition contributed to the formation of porous surface morphology and modi cation of band gap structure of the ZnO : Sn powders by generating micro shear force and strain at the surface of micro drops. The doping of Sn 4 ions into ZnO reduced the electrical resistivity by generating extra free electrons at the surface of ZnO : Sn powders.

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Development of microstructure CO sensor based on hierarchically porous ZnO nanosheet thin films

Cited by 119 publications

References 27 publications

Two-Dimensional Zinc Oxide Nanostructures for Gas Sensor Applications

Two-Dimensional Zinc Oxide Nanostructures for Gas Sensor Applications

Two-Dimensional Materials for Sensing: Graphene and Beyond

Optical Properties of Nano–Structured ZnO : Sn Powders Prepared in a Micro Drop Fluidized Reactor

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