Influence of crystallite shape on particle size broadening of Debye-Scherrer reflections

Lele, S.; Anantharaman, T. R.

doi:10.1007/bf03047543

Cited by 27 publications

(13 citation statements)

References 3 publications

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“…Calculated size was 30.14 nm. Lattice constants were also calculated peak positioned at 2θ = 36.45 [29,30] and Lattice parameters were measured using respective miller indices [31]. In the present research X-ray diffraction peaks (spectra) is in good agreement with the computational data.…”

Section: -Ray Diffraction (Xrd) Analysissupporting

confidence: 79%

Mechanistic Study of Antibacterial Properties of Chemically Synthesize Zinc Oxide Nanoparticles

et al. 2019

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Nanotechnology is the science, engineering and technology conducted at the scale that ranges between 1-100 nanometers. For the bio-application, evolution of nanotechnology is creating the concern of scientists towards the synthesis of nanoparticles. The nanoparticles have unique characteristics as compare to bulk materials. Zinc oxide (ZnO) is a matchless semiconductor and it has been under investigation due to its wide range of applications in various areas like biomedical, electronics, material science and optics. In the present work synthesis of ZnO nanoparticles was carried out by using simple chemical approach, Sol-gel method for being effective and inexpensive, by employing zinc acetate dehydrate Zn (CH3CO2)2.2H2O as a precursor and sodium hydroxide (NaOH) starch as a constant agent. The structural properties of resultant zinc oxide nanoparticles were investigated by X-ray diffraction (XRD) technique. The XRD data confirmed the hexagonal wurtzite structure of ZnO powder confirmed by JCPDS 36-1451 data. Particles size was calculated by Scherrer formula and calculated size was 30.14 nm. These nanoparticles were investigated for inhibition zone of bacterial strain Escherichia coli, a gram-negative microbe, at various concentrations of ZnO nanoparticles. Zinc oxide nanoparticles were very proficient for inhibition of growth of bacterial strain E. coli. The mechanism of ZnO NPs for antibacterial activity is release of reactive oxygen species which not only hydrolyze cell wall but cell membrane and cellular components as well providing a potential bactericidal effect.

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Section: -Ray Diffraction (Xrd) Analysissupporting

confidence: 79%

Mechanistic Study of Antibacterial Properties of Chemically Synthesize Zinc Oxide Nanoparticles

et al. 2019

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“…It is possible in principle to determine the dimensions of the hexagonal prisms ab initio, but in practice it is simpler to assume that the crystallites are cylindrical in the first instance. Then, if the preliminary results suggest that the crystallites are in fact hexagonal prisms, the Scherrer constants obtained by Lele & Anantharaman (1966) can be used to obtain more accurate values of size. (See also Langford, 1981, footnote to § 5.2.…”

Section: Kb1mentioning

confidence: 99%

“…Another form commonly encountered in practice, but not yet subjected to the same detailed analysis, is the right prism, with the cylinder as a limiting case. Expressions for the variance Scherrer constants for cylinders and prisms were given by Lele & Anantharaman (1966), who also derived the integral-breadth Scherrer constants for these shapes, and by Wilson (1969). The work of these authors on cylindrical crystallites is summarized here in a form which is more readily applicable in practice and the analysis is extended to include line profiles, the half-width Scherrer constant and the rotundity parameter (Mitra, 1964).…”

Section: Introductionmentioning

confidence: 99%

Diffraction line profiles and Scherrer constants for materials with cylindrical crystallites

Langford¹,

Louër²

1982

J Appl Cryst

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Calculations of diffraction line profiles and Scherrer constants for crystallites whose external shape has cubic symmetry are extended to crystallites of cylindrical shape. The analysis includes the limiting cases of acicular crystals and disks and, to a reasonable degree of approximation in many cases, to hexagonal prisms. These shapes have applications in size determination for materials which form prismatic crystallites, particularly those which belong to the hexagonal system or have been derived from substances with this symmetry.

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“…Size parameters and Scherrer constants for crystailites having a cylindrical or prismatic external form have been discussed by Lele & Anantharaman (1966),* by Wilson (1969b) and more recently by Langford & LouEr (1982). In this study we reconsider the important case of the hexagonal prism, that is to say, a right prism with a base defined by a regular hexagon.…”

Section: Introductionmentioning

confidence: 99%

Diffraction line profiles and Scherrer constants for materials with hexagonal crystallites

Vargas¹,

Louër²,

Langford³

1983

J Appl Cryst

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Diffraction line profiles and Scherrer constants for use with various measures of diffraction broadening are derived for right hexagonal prisms. A method is described for obtaining the size of crystallites with this form and a comparison is made with a cylindrical model. The technique is applied to annealed ZnO powder obtained from the thermal decomposition of Zn3(OH)4(NO3) 2. The Fourier method is used to show that the crystallites are hexagonal prisms with an average height and edge length of 213 and 87 A and with the z axis parallel to the axis of the prism and x or y parallel to an edge.

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Influence of crystallite shape on particle size broadening of Debye-Scherrer reflections

Cited by 27 publications

References 3 publications

Mechanistic Study of Antibacterial Properties of Chemically Synthesize Zinc Oxide Nanoparticles

Mechanistic Study of Antibacterial Properties of Chemically Synthesize Zinc Oxide Nanoparticles

Diffraction line profiles and Scherrer constants for materials with cylindrical crystallites

Diffraction line profiles and Scherrer constants for materials with hexagonal crystallites

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