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Updated: Jun 18, 2025

Theoretical Calculation and Experimental Verification for Dislocation Reduction in Germanium Epitaxial Layers with Semicylindrical Voids on Silicon
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Theoretical Calculation and Experimental Verification for Dislocation Reduction in Germanium Epitaxial Layers with Semicylindrical Voids on Silicon

Published on: July 17, 2020

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追踪格子扭曲诱导的缺陷和框架锡在贝塔异型

Yunfei Bai1,2, Esben Taarning1, Mahika Luthra3

  • 1Topsoe A/S, Haldor Topso̷es Allé 1, 2800 Kongens Lyngby, Denmark.

The journal of physical chemistry. C, Nanomaterials and interfaces
|August 2, 2024
PubMed
概括

粉末X射线衍射 (PXRD) 揭示了锡度,缺陷和Sn-Beta材料中的晶体结构之间的强烈联系. 这种方法提供了一种快速的方法来评估热型的结构变化和催化潜力.

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An ionic compound is stable because of the electrostatic attraction between its positive and negative ions. The lattice energy of a compound is a measure of the strength of this attraction. The lattice energy (ΔHlattice) of an ionic compound is defined as the energy required to separate one mole of the solid into its component gaseous ions. For the ionic solid sodium chloride, the lattice energy is the enthalpy change of the process:
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The structure of a crystalline solid, whether a metal or not, is best described by considering its simplest repeating unit, which is referred to as its unit cell. The unit cell consists of lattice points that represent the locations of atoms or ions. The entire structure then consists of this unit cell repeating in three dimensions. The three different types of unit cells present in the cubic lattice are illustrated in Figure 1.
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Deformation occurs in axial and transverse directions when an axial load is applied to a slender bar. This deformation impacts the cubic element within the bar, transforming it into either a rectangular parallelepiped or a rhombus, contingent on its orientation. This transformation process induces shearing strain. Axial loading elicits both shearing and normal strains. Applying an axial load instigates equal normal and shearing stresses on elements oriented at a 45° angle to the load axis.
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