Room temperature acetone-sensing properties of branch-like VO2 (B)@ZnO hierarchical hetero-nanostructures

Liang, Jiran; Ran, Yang; Zhu, Kuilong; Hu, Ming

doi:10.1007/s10854-017-8313-4

Cited by 23 publications

(8 citation statements)

References 37 publications

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“…The sudden change in the aspect ratio was possibly due to differences in average diameter and length of the ZnO NRs. The behavior of aspect ratio without air bubbles was in good agreement with previously reported studies [ 20 , 21 , 22 , 23 ]. From Figure 5 c, we noticed that the optimum aspect ratio corresponding to the growth time was achieved at 4 h. The obtained aspect ratios of ZnO NRs were (11) and (25) for conventional and modified CBD methods at 4 h, respectively.…”

Section: Resultssupporting

confidence: 92%

Fabrication and Characterization of High-Quality UV Photodetectors Based ZnO Nanorods Using Traditional and Modified Chemical Bath Deposition Methods

et al. 2021

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Ultraviolet (UV) photodetectors (PDs) based on high-quality well-aligned ZnO nanorods (NRs) were fabricated using both modified and conventional chemical bath deposition (CBD) methods. The modified chemical bath deposition (M-CBD) method was made by adding air bubbles to the growth solution during the CBD process. The viability and effectiveness of M-CBD were examined by developing UV PDs based on ZnO NRs. The ZnO nano-seed layer was coated on a glass substrate utilizing radiofrequency (RF) sputtering. The impact of the different growth-times on morphology, growth rate, crystal structure, and optical and chemical properties were investigated systematically using different characterization techniques, such as field-emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD) analysis, UV–VIS double beam spectrometer, and energy dispersive X-ray analysis (EDX), respectively. The Al/ZnO UV PDs based on ZnO nanorods were fabricated with optimum growth conditions through the two methods of preparation. This study showed that the synthesized ZnO NRs using the M-CBD method for different growth times possess better properties than the conventional method under similar deposition conditions. Despite having the highest aspect ratio and growth rate of ZnO NRs, which were found at 4 h growth duration for both methods, the aspect ratio of ZnO NRs using the M-CBD technique was comparatively higher than the conventional CBD method. Besides, the UV PDs fabricated by the M-CBD method at 5 V bias voltage showed high sensitivity, short response time, quick recovery time, high gain, low dark current, and high photocurrent compared with the UV PD device fabricated by the conventional CBD method.

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Section: Resultssupporting

confidence: 92%

Fabrication and Characterization of High-Quality UV Photodetectors Based ZnO Nanorods Using Traditional and Modified Chemical Bath Deposition Methods

et al. 2021

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“…Upon C 3 H 6 O interaction with the chemisorbed oxygen species, the formation of an intermediate unstable hydroxymethyl compound CH 3 -CO 2 -CH 3 gets facilitated as given in eqn (14). As a result of the strong C 3 H 6 O-Co 3 O 4 interaction, more oxygen adsorption sites are consumed in-turn decrease the holes concentration.…”

Section: View Article Onlinementioning

confidence: 99%

Development of an acetone sensor using nanostructured Co₃O₄ thin films for exhaled breath analysis

et al. 2019

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“…Therefore, structural modification is also a way to improve the gas sensitivity response. A variety of VO 2 nanostructures such as thin films, nanorods, nanosheets, and nanoflowers have been prepared to enhance the sensing performance. − …”

Section: Introductionmentioning

confidence: 99%

NO₂ Gas Sensing Performance of a VO₂(B) Ultrathin Vertical Nanosheet Array: Experimental and DFT Investigation

Liang

Lou

et al. 2021

ACS Appl. Mater. Interfaces

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A VO2(B) ultrathin vertical nanosheet array was prepared by the hydrothermal method. The influence of the concentration of oxalic acid on the crystal structure and room-temperature NO2 sensing performance was studied. The morphology and crystal structure of the nanosheets were characterized by scanning electron microscopy, transmission electron microscopy, and X-ray diffraction. Room-temperature gas sensing measurements of this structure to NO2 with a concentration span from 0.5 to 5 ppm were carried out. The experimental results showed that the thickness of the vertical VO2(B) nanosheet was lower than 20 nm and close to the 2 times Debye length of VO2(B). The response of the sensor based on this structure to 5 ppm NO2 was up to 2.03, and the detection limit was 20 ppb. Its high response performance was due to the fact that the target gas could completely control the entire conductive path by forming depletion layers on the surface of VO2(B) nanosheets. Density functional theory was used to analyze the adsorption of NO2 on the VO2(B) surface. It is found that the band gap of VO2(B) becomes narrower and the Fermi level moves to the valence band after NO2 adsorption, and the density of states near the Fermi level increases significantly. This ultrathin vertical nanosheet array structure can make VO2(B) detect NO2 with high sensitivity at room temperature and therefore has potential applications in the field of low-power-consumption gas sensors.

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Room temperature acetone-sensing properties of branch-like VO2 (B)@ZnO hierarchical hetero-nanostructures

Cited by 23 publications

References 37 publications

Fabrication and Characterization of High-Quality UV Photodetectors Based ZnO Nanorods Using Traditional and Modified Chemical Bath Deposition Methods

Fabrication and Characterization of High-Quality UV Photodetectors Based ZnO Nanorods Using Traditional and Modified Chemical Bath Deposition Methods

Development of an acetone sensor using nanostructured Co₃O₄ thin films for exhaled breath analysis

NO₂ Gas Sensing Performance of a VO₂(B) Ultrathin Vertical Nanosheet Array: Experimental and DFT Investigation

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Room temperature acetone-sensing properties of branch-like VO2 (B)@ZnO hierarchical hetero-nanostructures

Cited by 23 publications

References 37 publications

Fabrication and Characterization of High-Quality UV Photodetectors Based ZnO Nanorods Using Traditional and Modified Chemical Bath Deposition Methods

Fabrication and Characterization of High-Quality UV Photodetectors Based ZnO Nanorods Using Traditional and Modified Chemical Bath Deposition Methods

Development of an acetone sensor using nanostructured Co3O4 thin films for exhaled breath analysis

NO2 Gas Sensing Performance of a VO2(B) Ultrathin Vertical Nanosheet Array: Experimental and DFT Investigation

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Development of an acetone sensor using nanostructured Co₃O₄ thin films for exhaled breath analysis

NO₂ Gas Sensing Performance of a VO₂(B) Ultrathin Vertical Nanosheet Array: Experimental and DFT Investigation