Annealing temperature effect on optical properties of Cr-implanted ZnO nanostructure

Doletay, T.; Ahmad, Ishaq

doi:10.56053/5.2.119

Cited by 4 publications

(6 citation statements)

References 36 publications

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“…Fly ash is a waste that is discharged from fuel burning operation of thermal power plants. It accounts for about 80% of unburned inorganic matter volume during coal burning [1]. Fly ash flies out, and is collected at a static dust filter.…”

Section: Introductionmentioning

confidence: 99%

Approach to fly in roadbed cobnstrction

Papagelis¹,

Pumera²,

Simos³

2023

ETN

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Nowadays, filling sand is mainly used for roadbed construction. However, this material resource is gradually depleting. At the same time, sand has loose grain structure and small elastic modulus (E ≤ 40Mpa) therefore it fails to meet the technical requirements of roadbed construction. Consequently, roadbed is often embanked with alternative materials such as soil reinforced with inorganic binders, natural aggregates, and macadam. leading to high cost and environmental pollution. Therefore, it is important to determine a new type of roadbed material. This study presents several laboratory tests on the mechanical and physical properties of sand mixed with fly ash in order to find an appropriate mixture for roadbed construction. The test results show that the mixture of sand and fly ash, which contains an optimal ratio of sand/fly ash of 70%/30% with a dry volume value of 1.821g/cm³, not only meets the requirements for roadbed materials, but also utilizes more fly ash. When adopting Geopolymer technology where alkaline solution is added to reinforce sand-fly ash mixture with the ratio of sand/fly ash of 70%/30%, fly ash will be activated by the alkaline solution to produce gelatinous material through a series of reactions. The gelatinous material is characterized by the high-strength and the tightly-linked molecules. Apart from being a suitable material for roadbed construction, sand fly ash material can also be used as a foundation layer for pavement structure

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Section: Introductionmentioning

confidence: 99%

Approach to fly in roadbed cobnstrction

Papagelis¹,

Pumera²,

Simos³

2023

ETN

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“…Pure and doped PbI2 nanopowders can be prepared by various techniques, such as hydrothermal, thermal evaporation, flux growth, spin coating, sequential deposition method (SDM), microwave, and chemical root synthesis [9]. For example, XZnFe2O3 (X= Mg, Co, Ni) quaternary alloys, MgZnFe2O3, CoZnFe2O3, and NiZnFe2O3 nanoparticles were friendly and chemically prepared using co-precipitation method by A. T. Al-Douri et al for potential antibacterial and optoelectronic applications [10]. Among those different growth methods, facile microwave synthesis is attractive for preparing the desired nanostructures at low cost, with considerable chemical stability, and environmentally beneficial usage.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of tungsten-doped PbI2 nanostructure

Zhong

2023

ETN

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Facile synthesis of the microwave was applied to assist in synthesizing pure and tungsten-doped lead iodide (W: PbI2) nanosheets with less than 100 nm thickness. The proposed W-doped PbI2 nanosheets were subjected to various characterization, including structural, morphological, spectral, optical, dielectric, and radiation studies. SEM and EDX investigations confirmed that the tungsten dopants affect the undoped PbI2 matrix. The structural morphology from XRD patterns approved the good crystallinity of the prepared W-doped PbI2 nanostructures. Optical characterizations revealed the energy band structure of the grown materials. The dielectric constant of the W-doped PbI2 nanostructures varied from 23 to 31, confirming the increasing dielectric trend with increasing W doping concentrations. The Gamma linear absorption coefficient value was found to vary between 9.2 and 15 in case Am-241, suggesting various applications in radiation detectors for the prepared W-doped PbI2 nanostructured sheets.

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“…The structural, transport and optical properties of Bdoped ZnO thin films differ from those of ZnO thin films [14][15][16]. Doped ZnO plays important role in wide range of applications such as micro-electro-mechanical systems (MEMS) due to their good piezoelectric effect [17][18][19], transparent conducting electrodes in some devices due to their good electrical conductivity [20], light emitting diodes, UV lasers, transparent field effect transistors, solar cells and other optical coating applications [21]. Many techniques have been used to deposit undoped ZnO and B-doped ZnO thin films, such as chemical vapor deposition [22,23], magnetron sputtering [16,24], pulse laser deposition [25,26], electrochemical deposition [27], and the sol-gel technique [15,28].…”

Section: Introductionmentioning

confidence: 99%

Optical Characterization of Boron-doped ZnO nanostructures

Al-Ahmad

Qasabi

2022

ETN

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Zinc oxide and Boron-doped zinc oxide (B-ZnO) thin films have been dip coated on glass substrates using Sol-Gel technique. The ZnO solution was prepared by using zinc acetate dihydrate (ZAD) as starting material. Ethanol and citric acid are used in the Sol-Gel process as solvent and solution stabilizer, respectively. Doping of boron is achieved by adding a proper molar ratio of Boric acid (H3BO3) solution to the final ZnO solvent. The optical properties of thin films were investigated using UV-vis spectrophotometer measurements. Transmittance of undoped ZnO films exhibits high values that are decreasing upon increasing the Boron concentration. We found that the index of refraction of undoped ZnO films demonstrates values ranging between 1.6 and 2.2 and increase as B concentration is increased and approximately match those of bulk ZnO. In addition, structural properties were investigated using XRD, SEM and EDAX techniques. Upon annealing, we found that the films exhibit a hexagonal structure and as B concentration increases the grain size increases and the strain decreases. Our results indicate that (B-ZnO) films could be used as seeded platforms for growing nanostructures using hydrothermal method.

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Annealing temperature effect on optical properties of Cr-implanted ZnO nanostructure

Cited by 4 publications

References 36 publications

Approach to fly in roadbed cobnstrction

Approach to fly in roadbed cobnstrction

Synthesis of tungsten-doped PbI2 nanostructure

Optical Characterization of Boron-doped ZnO nanostructures

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