Structural, optical, electrical and morphological properties of different concentration sol-gel ZnO seeds and consanguineous ZnO nanostructured growth dependence on seeds

Rana, Abu ul Hassan S.; Chang, Seung-Bo; Chae, Hyun Uk

doi:10.1016/j.jallcom.2017.09.231

Cited by 23 publications

(10 citation statements)

References 41 publications

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“…The increase in grain size suggests improved crystallinity with decreased grain boundary. Hence, scattering due to grain boundary is reduced, which results in an increase in conductivity [33]. The topographical image of un-doped CdO and Sn:CdO (10 mL of 0.3 mM Sn) taken by atomic force microscopy (AFM) is shown in Figure 5.…”

Section: Morphological Evaluationmentioning

confidence: 99%

Analysis of Sn Concentration Effect on Morphological, Optical, Electrical and Photonic Properties of Spray-Coated Sn-Doped CdO Thin Films

et al. 2018

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Tin-doped cadmium oxide (Sn:CdO) transparent thin films with different Sn concentrations were deposited on glass and p-silicon substrates by the chemical spray method at 250 • C. Different concentrations of stannic chloride were used to prepare Sn:CdO thin films. The prepared doped and un-doped CdO films were subjected to X-ray diffraction (XRD), scanning electron microscopy and atomic force microscopy, optical absorption, and electrical analyses to characterize their structural, morphological, optical, and electrical properties, respectively. XRD analysis demonstrated the growth of polycrystalline and cubic CdO with preferential orientation along the (111) plane. Sn-doping shifted the XRD peaks slightly towards a higher Bragg angle and increased the band gap of CdO thin films. Variation in doping concentration also affected the morphology of the films. Optimum Sn-doping increased the electrical conductivity of CdO thin films. Furthermore, to the best of our knowledge, the photoresponse analyses of the fabricated un-doped and doped n-CdO/p-Si heterostructures were performed for the first time in this study.

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Section: Morphological Evaluationmentioning

confidence: 99%

Analysis of Sn Concentration Effect on Morphological, Optical, Electrical and Photonic Properties of Spray-Coated Sn-Doped CdO Thin Films

et al. 2018

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“…Chemical methods, such as the spin-coating, dip-coating, and sol-gel have been applied for the preparation of metal oxide thin films and nanoparticles [46][47][48]. The aforementioned methods are very convenient for the fabrication of composite structures due to the availability of precursor materials [47][48][49].…”

Section: Metal Oxide Nanostructures Growth and Fabrication Methodsmentioning

confidence: 99%

“…The aforementioned methods are very convenient for the fabrication of composite structures due to the availability of precursor materials [47][48][49]. The morphology, alignment, density, aspect ratio, and crystalline quality of the materials that were prepared by sol-gel are directly related to the seed layer parameters [46]. Recent investigations have shown that the hydrothermal growth using different chemical solutions is another efficient method for the preparation of pure and doped oxide materials with various shapes (nanorods, nanofibers, nanowires, and nanosheets) [50][51][52][53].…”

Section: Metal Oxide Nanostructures Growth and Fabrication Methodsmentioning

confidence: 99%

Metal Oxide Nanostructures in Food Applications: Quality Control and Packaging

et al. 2018

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Metal oxide materials have been applied in different fields due to their excellent functional properties. Metal oxides nanostructuration, preparation with the various morphologies, and their coupling with other structures enhance the unique properties of the materials and open new perspectives for their application in the food industry. Chemical gas sensors that are based on semiconducting metal oxide materials can detect the presence of toxins and volatile organic compounds that are produced in food products due to their spoilage and hazardous processes that may take place during the food aging and transportation. Metal oxide nanomaterials can be used in food processing, packaging, and the preservation industry as well. Moreover, the metal oxide-based nanocomposite structures can provide many advantageous features to the final food packaging material, such as antimicrobial activity, enzyme immobilization, oxygen scavenging, mechanical strength, increasing the stability and the shelf life of food, and securing the food against humidity, temperature, and other physiological factors. In this paper, we review the most recent achievements on the synthesis of metal oxide-based nanostructures and their applications in food quality monitoring and active and intelligent packaging.

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“…To make an Ohmic contact with ZnO, silver (Ag) was deposited on the substrate as a bottom electrode. For vertical ZNR fabrication on the substrate, a ZnO buffer layer is inevitable [25]. Hence, the 0.029 M ZnO buffer solution was produced by ultra-sonicating zinc acetate dihydrate (Zn(CH 3 COO) 2 •2H 2 O) (CAS: 5970-45-6, purity 99%) and n-propanol (C 3 H 8 O) (CAS: 67-63-0, purity 99%) for 30 min.…”

Section: Device Fabricationmentioning

confidence: 99%

Intrinsic Control in Defects Density for Improved ZnO Nanorod-Based UV Sensor Performance

et al. 2020

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Hitherto, most research has primarily focused on improving the UV sensor efficiency via surface treatments and by stimulating the ZnO nanorod (ZNR) surface Schottky barriers. However, to the best of our knowledge, no study has yet probed the intrinsic crystal defect generation and its effects on UV sensor efficiency. In this study, we undertake this task by fabricating an intrinsic defect-prone hydrothermally grown ZNRs (S1), Ga-doped ZNRs (S2), and defect-free microwave-assisted grown ZNRs (S3). The defect states were recognized by studying X-ray diffraction and photoluminescence characteristics. The large number of crystal defects in S1 and S2 had two pronged disadvantages. (1) Most of the UV light was absorbed by the defect traps and the e–h pair generation was compromised. (2) Mobility was directly affected by the carrier–carrier scattering and phonon scattering processes. Hence, the overall UV sensor efficiency was compromised based on the defect-induced mobility-response model. Considering the facts, defect-free S3 exhibited the best UV sensor performance with the highest on/off ratio, the least impulse response time, the highest recombination time, and highest gain-induced responsivity to 368 nm UV light, which was desired of an efficient passive metal oxide-based UV sensor. Our results were compared with the recently published results.

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Structural, optical, electrical and morphological properties of different concentration sol-gel ZnO seeds and consanguineous ZnO nanostructured growth dependence on seeds

Cited by 23 publications

References 41 publications

Analysis of Sn Concentration Effect on Morphological, Optical, Electrical and Photonic Properties of Spray-Coated Sn-Doped CdO Thin Films

Analysis of Sn Concentration Effect on Morphological, Optical, Electrical and Photonic Properties of Spray-Coated Sn-Doped CdO Thin Films

Metal Oxide Nanostructures in Food Applications: Quality Control and Packaging

Intrinsic Control in Defects Density for Improved ZnO Nanorod-Based UV Sensor Performance

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