Effect of PEG-400 on the morphology and electrical properties of ZnO nanoparticles application for gas sensor

Akermi, Mehdi; Sakly, Nawfel; Chaâbane, Rafik Ben; Ouada, H. Ben

doi:10.1016/j.mssp.2013.01.005

Cited by 27 publications

(7 citation statements)

References 29 publications

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“…This trapping occurred due to the high R effects on carrier flow between the metal and semiconductor or it can be caused due to the surface roughness or lattice mismatch at the interface of metal-semiconductor [22][23][24]. Usually, in n-type ZnO a large amount of electrons tends to diffuse away to reach the interface layer but trapped by the trapping states by a positive ionized donor charges in the neighborhood of interface of metal-ZnO nanorods [23][24][25][26][27][28].Therefore a large amount of charges moved along the metal and semiconductor interfaces, so trapping states occurred in the interface layers due to the various metal-oxides addition [23][24][25].…”

Section: Frequency Dependent Impedance Analysismentioning

confidence: 99%

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Analysis of junction properties of gold–zinc oxide nanorods-based Schottky diode by means of frequency dependent electrical characterization on textile

et al. 2014

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Moreover, current density-voltage (J-V) was measured to know the performance of present Schottky diode. The effect of native defects at the interface was also studied by using cathodoluminescence spectroscopy by varying different accelerating voltage. The textile substrate was used for the growth of ZnO nanorods by using the aqueous chemical growth (ACG) method and Schottky diode fabrication. Diode fabrication on textile fabric is a step forward towards the fabrication of electronic devices on non-conventional, economical, soft, light weight, flexible, wearable, washable, recyclable, reproducible and nontoxic substrate.

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Section: Frequency Dependent Impedance Analysismentioning

confidence: 99%

“…Moreover, Schottky diodes are associated with quicker switching and lower turn on voltages compared to p-n junction diodes. There has been less work reported on the frequency dependent electrical characterization of metal-semiconductor Schottky nanocontacts [25][26]. Faraz Schottky nanocontacts [34].…”

Section: Introductionmentioning

confidence: 99%

Analysis of junction properties of gold–zinc oxide nanorods-based Schottky diode by means of frequency dependent electrical characterization on textile

et al. 2014

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“…5a illustrates the response obtained for the ZnO nanostructure synthesized at 120 1C. This sample showed the highest sensitivity to O 3 gas (m ¼ 2.4) even for a short exposure time (15 s), demonstrating an extremely high value, even at low concentrations, compared with the data in the literature [52]. In addition, this sample showed an n-type semiconductor behavior.…”

Section: Resultsmentioning

confidence: 64%

Novel ozone gas sensor based on ZnO nanostructures grown by the microwave-assisted hydrothermal route

Rocha

Foschini

Silva

et al. 2016

Ceramics International

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Good quality ZnO nanostructures were obtained by the microwave-assisted hydrothermal synthesis, at low reaction temperatures, using zinc acetate as the starting precursor. X-ray diffraction confirmed the crystallinity of the ZnO nanostructures, which resulted free of impurities. Field emission gun scanning electron microscopy analysis revealed that the ZnO nanostructures crystallized at 120 1C were more homogeneous and had a constant diameter along the entire wire length, exhibiting an ideal defect density that favors the gas sensing response. A new ozone gas sensor based on these nanostructures was evaluated at low exposure times (15 s) by recording the change in the film resistance. The ZnO nanostructures showed good sensitivity even at low ozone concentration (100 ppb), and fast response and short recovery time at 200 1C, demonstrating great potential for a variety of applications. Two main effects were observed: the first one is intrinsic to that of the sample, while the second is a consequence of the surface and interface complex cluster defects, which produce extrinsic defects.

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“…It can be seen that the strong diffraction peak of W2 is shorter than those of W1. This is because PEG-1000 addition in the system will extend the possible interactions and the reactivity control of the tungsten precursor, at the same time it also delay crystallization [ 6,7]. SEM images of W1 and W2 are presented in Figure 2.…”

Section: Resultsmentioning

confidence: 99%

Effect of PEG on the Morphology and NH3 Gas Sensing Properties of WO3 Nanostructures

Sun¹,

Wen²

2017

dtmse

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Abstract. WO3 nanostructures were obtained by hydrothermal method using sodium tungstate dihydrate (Na2WO4•2H2O), hydrochloric acid(HCl). Polyethylene glycol (PEG-1000) was added in the initial precursors. The phase of WO3 nanostructures are characterized by X-ray diffraction (XRD). The morphology of WO3 are characterized by scanning electron microscopy (SEM). The morphology of WO3 was nanorods, however became nanoparticles with PEG-1000 adding. The effect of PEG on the formation of WO3 nanoparticles was studied. The NH3 gas sensing properties of WO3 nanostructures were also studied. The result showed that the sensitivity was increased with PEG -1000 adding.

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Effect of PEG-400 on the morphology and electrical properties of ZnO nanoparticles application for gas sensor

Cited by 27 publications

References 29 publications

Analysis of junction properties of gold–zinc oxide nanorods-based Schottky diode by means of frequency dependent electrical characterization on textile

Analysis of junction properties of gold–zinc oxide nanorods-based Schottky diode by means of frequency dependent electrical characterization on textile

Novel ozone gas sensor based on ZnO nanostructures grown by the microwave-assisted hydrothermal route

Effect of PEG on the Morphology and NH3 Gas Sensing Properties of WO3 Nanostructures

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