相关实验视频

Updated: Jul 12, 2026

Atom Probe Tomography Studies on the Cu(In,Ga)Se2 Grain Boundaries
09:51

Atom Probe Tomography Studies on the Cu(In,Ga)Se2 Grain Boundaries

Published on: April 22, 2013

在SrTiO3中直接确定谷物边界原子结构

M M McGibbon, N D Browning, M F Chisholm

    Science (New York, N.Y.)
    |October 7, 1994
    PubMed
    概括

    研究人员使用先进的成像和光谱学开发了一种酸粒边界的原子模型. 这种方法可以在不需要先前的结构假设的情况下揭示剂部位,从而推进接口分析.

    更多相关视频

    Spark Plasma Sintering Apparatus Used for the Formation of Strontium Titanate Bicrystals11:17

    Spark Plasma Sintering Apparatus Used for the Formation of Strontium Titanate Bicrystals

    Published on: February 9, 2017

    Epitaxial Growth of Perovskite Strontium Titanate on Germanium via Atomic Layer Deposition09:45

    Epitaxial Growth of Perovskite Strontium Titanate on Germanium via Atomic Layer Deposition

    Published on: July 26, 2016

    相关概念视频

    Determination of Crystal Structures01:29

    Determination of Crystal Structures

    In the late 1800s, the revelation that light extended beyond visible wavelengths led to the discovery of X-rays by Wilhelm Roentgen. Recognized as high-energy electromagnetic radiation with short wavelengths, X-rays prompted exploration into their interaction with crystals. Max von Laue proposed in 1912 that the periodic arrangement of atoms, ions, or molecules in crystals would cause them to diffract X-rays, a hypothesis confirmed through experiments with copper sulfate and zinc sulfide...
    Imperfections in Crystal Structure: Stoichiometric Point Defects01:26

    Imperfections in Crystal Structure: Stoichiometric Point Defects

    Schottky defects arise when some lattice points in a crystal, such as those in NaCl, remain unoccupied, creating lattice vacancies without disturbing the overall electrical neutrality of the crystal. This defect is common in ionic crystals where the positive and negative ions are similar in size, as seen in sodium chloride and cesium chloride. The presence of Schottky defects enables the crystal to conduct electricity to a small extent through an ionic mechanism. Electric fields cause nearby...
    Imperfections in Crystal Structure: Non-Stoichiometric Defects01:29

    Imperfections in Crystal Structure: Non-Stoichiometric Defects

    Non-stoichiometric defects refer to a type of defect in the crystal structure of a compound where the ratio of its constituent elements deviates from the ideal stoichiometric ratio. There are two main types of non-stoichiometric defects: metal excess defects and metal deficiency defects.Metal excess defects occur when there is a slight surplus of metal ions than what is required by the stoichiometric ratio of the compound. For example, heating a sodium chloride crystal in sodium vapor results...
    Predicting Molecular Geometry02:27

    Predicting Molecular Geometry

    VSEPR Theory for Determination of Electron Pair Geometries
    X-ray Crystallography02:18

    X-ray Crystallography

    The size of the unit cell and the arrangement of atoms in a crystal may be determined from measurements of the diffraction of X-rays by the crystal, termed X-ray crystallography.
    Diffraction
    Diffraction is the change in the direction of travel experienced by an electromagnetic wave when it encounters a physical barrier whose dimensions are comparable to those of the wavelength of the light. X-rays are electromagnetic radiation with wavelengths about as long as the distance between neighboring...