ZnO gas sensors: A comparison between nanoparticles and nanotetrapods-based thick films

Carotta, M.C.; Cervi, A.; Natale, V. di; Gherardi, S.; Giberti, A; Guidi, V.; Puzzovio, D.; Vendemiati, B.; Martinelli, G.; Sacerdoti, M.; Calestani, Davide; Zappettini, A.; Zha, M.; Zanotti, L.

doi:10.1016/j.snb.2008.11.007

Cited by 155 publications

(94 citation statements)

References 21 publications

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“…The diluted concentration of oxygen can then meet the conditions necessary for whisker generation. Carotta [33] heated metallic Zn foil to 650 °C under Ar gas flow. O 2 was then introduced to the Ar flow, and the furnace was cooled to room temperature.…”

Section: Atmosphere-controlled Oxidationmentioning

confidence: 99%

ZnO Tetrapods: Synthesis and Applications in Solar Cells

Yan

Uddin

Wang

2015

Nanomaterials and Nanotechnology

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Zinc oxide (ZnO) tetrapods have received much interest due to their unique morphology, that is, four arms connected to one centre. Tetrapod networks possess the excellent electronic properties of the ZnO semiconductor, which is attractive for photoelectrode materials in energyconversion devices because of their advantages in electron extraction and transportation. In this review, we have discussed recent advancements in the field of ZnO tetrapod synthesis, including vapour transport synthesis and the wet chemical method, together with their advantages and disadvantages in terms of morphology control and yield regulation. The developments and improvements in the applications of ZnO nanotetrapods in photovoltaics, including dye-sensitized solar cells and polymer solar cells, are also described. Our aim is to give readers a comprehensive and critical overview of this unique morphology of ZnO, including synthesis control and growth mechanism, and to understand the role of this particular morphology in the development of solar cells. The future research directions in ZnO tetrapods-based solar cell are also discussed.

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Section: Atmosphere-controlled Oxidationmentioning

confidence: 99%

ZnO Tetrapods: Synthesis and Applications in Solar Cells

Yan

Uddin

Wang

2015

Nanomaterials and Nanotechnology

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“…Gas sensors based on n-type semiconductors like SnO 2 and ZnO have been studied for the detection of inflammable or toxic gases such as H 2 , CH 4 , C 2 H 5 OH, CO or LPG [32][33][34][35][36][37][38][39].…”

Section: International Letters Of Chemistry Physics and Astronomy Vomentioning

confidence: 99%

Studies on Spray Pyrolised Nanostructured SnO<sub>2</sub> Thin Films for H<sub>2</sub> Gas Sensing Application

Bari¹,

Patil²

2014

ILCPA

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The objective of this work is to study the influence of pyrolysis temperature on structural, surface morphology and gas sensing properties of the nanostructured SnO 2 thin films prepared by spray pyrolysis technique. These films were characterized for the structural, morphological and elemental composition carried by means of X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive spectrophotometer (EDAX). The information of crystallite size, dislocation density and microstrain is obtained from the full width-at half-maximum (FWHM) of the diffraction peaks. Effect of sprayed deposition temperature on H 2 gas sensing performance and electrical properties were studied using static gas sensing system. The sensor (T pyr . = 350 °C) showed high gas response (S = 1200 at 350 °C) on exposure of 500 ppm of H 2 and high selectivity against other gases The results are discussed and interpreted.

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“…As shown in previous work, the morphology of ZnO can significantly influence gas sensing to NO 2 . [16][17][18] Here, we grow different ZnO nanostructures on-chip by a low-temperature hydrothermal method and investigate the influence of morphology on NO 2 gas sensing.…”

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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ZnO gas sensors: A comparison between nanoparticles and nanotetrapods-based thick films

Cited by 155 publications

References 21 publications

ZnO Tetrapods: Synthesis and Applications in Solar Cells

ZnO Tetrapods: Synthesis and Applications in Solar Cells

Studies on Spray Pyrolised Nanostructured SnO<sub>2</sub> Thin Films for H<sub>2</sub> Gas Sensing Application

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

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