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原子分辨率成像在单层化学蒸汽沉积培养的六边形化中颗粒边界缺陷的原子分辨率成像

Ashley L Gibb1, Nasim Alem, Jian-Hao Chen

  • 1Department of Chemistry, University of California, Berkeley, California 94720, United States.

Journal of the American Chemical Society
|April 5, 2013
PubMed
概括

研究人员使用先进显微镜观察六角化 (h-BN) 板中的粒度边界. 他们解决了缺陷动力学和外平面曲折,证实了对h-BN粒度边界的理论预测.

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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...
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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...