Synthesis and structural analysis of Fe doped TiO2 nanoparticles using Williamson Hall and Scherer Model

Patle, L. B.; Labhane, Prakash K.; Huse, V. R.; Gaikwad, K. D.; Chaudhari, A.

doi:10.1063/1.5032380

Cited by 9 publications

(7 citation statements)

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“…This is not inconsistent with the GPA results because WH results are averaged over all crystallites in the specimen. d WH values (12–21 nm) are smaller than d S (24–38 nm), as reported by other authors. , The very small value obtained for sample NF-25/600 (12.3 nm) is consistent with the high-defectiveness of the α-Fe 2 O 3 lattice, evidenced by the GPA of the HRTEM images. By plotting ε WH vs. 1/ d WH (surface-to-volume ratio), a strong linear correlation is found (Figure b).…”

Section: Resultssupporting

confidence: 87%

Structure, Defects, and Magnetism of Electrospun Hematite Nanofibers Silica-Coated by Atomic Layer Deposition

et al. 2020

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In the last years, hematite has been utilized in a plethora of applications. High aspect-ratio nanohematite and hematite/silica core–shell nanostructures are arousing growing interest for applications exploiting their magnetic properties. Atomic layer deposition (ALD) is utilized here to produce SiO2-coated α-Fe2O3 nanofibers (NFs) through two synthetic routes, viz. electrospinning/calcination/ALD or electrospinning/ALD/calcination. The number of ALD cycles (10–100) modulates the coating thickness, while the chosen route controls the final nanostructure. Porous and partially hollow NFs are produced. Their hierarchical structure and the nature and density of the lattice defects and strain are characterized by combining electron microscopy, diffraction, and spectroscopy techniques. The uncoated hematite NFs mostly have surface-related strain, which is attributed to oxygen vacancies/Fe2+ sites. ALD coating causes microstrain release and decrease of surface states. NFs calcined after ALD have extensive bulk strain, which is ascribed to the presence of dislocations throughout the volume of the NF grains. Bulk strain determines the remanent magnetization, whereas both surface and bulk strain influence the coercive field and the thermal behavior across the Morin temperature, including the magnetic memory effect. To the best of the authors’ knowledge, the correlation between lattice defects/strain and magnetic properties of SiO2-coated α-Fe2O3 NFs has never been reported before.

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Section: Resultssupporting

confidence: 87%

Structure, Defects, and Magnetism of Electrospun Hematite Nanofibers Silica-Coated by Atomic Layer Deposition

et al. 2020

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“…The average D of crystallite sizes and strain ε in films was calculated by the Williamson–Hall method, Equation , using the most intense diffraction peaks

β \cos θ = k λ / D + 4 ε \sin θ

where β is the peak width at mid‐height, θ is the diffraction angle, k is a constant having a value of 0.9, and λ = 1.54Å.…”

Section: Resultsmentioning

confidence: 99%

Solvent and Spinning Speed Effects on CH₃NH₃PbI₃ Films Deposited by Spin Coating

Belaidi

Khelfaoui

Attaf

et al. 2019

Physica Status Solidi (a)

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Herein, methylammonium lead triode (CH 3 NH 3 PbI 3 ) perovskite thin films are prepared by the one-step deposition spin-coating process on glass substrates. The effects of solvent nature and speed centrifugation on films' morphology and structure are investigated. Two solvents are used: N,N-dimethyl formamide (DMF) and a mixture of dimethyl sulfoxide (DMSO) with DMF. The spinning speed varies in the range 700-2000 rpm. Scanning electron microscopy (SEM) observations reveal that the prepared films are not continuous with variable morphologies; the films are formed with elongated fibers. X-ray diffraction (XRD) analysis confirms the tetragonal structure of the prepared perovskite. The film structure is also investigated by Raman spectroscopy. The film's optical properties are studied using UV spectroscopy. The results indicate that solvent nature and spinning velocity alter film morphology. With increasing spinning velocity, the films' porosity increases. The films' formation is controlled by the competition between the radial force due to spinning velocity and resistive force due to solution viscosity.

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“…The XRD model verified the existence of crystal, hexagonal ZnO nanoparticles with different reaction times and an average crystallite size of 30 to 36 nm.Nanocrystalline Ti alloy cry milling powder was developed in (2018) M. OH and H.K. YU, et al [15]. The development of grain and crystal grid stress was evaluated using the Scherrer, Williamson-Hall (W-H) and Size-Plot (SSP) techniques.…”

Section: Review Of Literaturementioning

confidence: 99%

“…The feed-doped TiO2 nanoparticles have been prepared by the updated co-precipitation method in (2018) L. B. Patel et al [15]. The Scherer method and the Williamson Hall method were used for the study of the X-ray peak enlargement to measure crystalline size and grid strain.…”

Section: Review Of Literaturementioning

confidence: 99%

A comparative study of the method of Williamson Hall and the pattern of cadmium oxide nanoparticles for X-rays

Mohammed¹

2021

TURCOMAT

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X-ray difraction (XRD) is an effective non-destructive instrument used in the determination and analysis of amorphous and crystalline materials. Three basic elements are the X-ray diffractometers: the X-ray tube, a retention of samples and an X-ray detector. In many industries such as diodes, transistors, detectors, solar and photovoltaic cells, cadmium oxide CdO nanoparticles are used. For this analysis, CdO nanoparticles are semi-conductors (type) and band-gaps of 2.5 eV and 1.98 eV in direct and indirect bands using cadmium oxide. Several temperatures, effects and parameters such as texture coefficient (TC), dislocation density(μ), special area (SSA), and micro strain were measured and determined (S). The peaks of the analysis were the extension of the nano structure, crystal size and grid pressure of the CdO and were measured using the Size Train Plot of Williamson-Hall (SSP). The composition of the particle is the cubic fluorite and spatial group Fm-3m (225). In the peaks resulting from the calcination process, strain enlargement was observed. Accordingly, the above procedure determined all physical parameters as a result of the diffraction effects.

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Synthesis and structural analysis of Fe doped TiO2 nanoparticles using Williamson Hall and Scherer Model

Cited by 9 publications

References 10 publications

Structure, Defects, and Magnetism of Electrospun Hematite Nanofibers Silica-Coated by Atomic Layer Deposition

Structure, Defects, and Magnetism of Electrospun Hematite Nanofibers Silica-Coated by Atomic Layer Deposition

Solvent and Spinning Speed Effects on CH₃NH₃PbI₃ Films Deposited by Spin Coating

A comparative study of the method of Williamson Hall and the pattern of cadmium oxide nanoparticles for X-rays

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Synthesis and structural analysis of Fe doped TiO2 nanoparticles using Williamson Hall and Scherer Model

Cited by 9 publications

References 10 publications

Structure, Defects, and Magnetism of Electrospun Hematite Nanofibers Silica-Coated by Atomic Layer Deposition

Structure, Defects, and Magnetism of Electrospun Hematite Nanofibers Silica-Coated by Atomic Layer Deposition

Solvent and Spinning Speed Effects on CH3NH3PbI3 Films Deposited by Spin Coating

A comparative study of the method of Williamson Hall and the pattern of cadmium oxide nanoparticles for X-rays

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Solvent and Spinning Speed Effects on CH₃NH₃PbI₃ Films Deposited by Spin Coating