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Lewis Structures of Molecular Compounds and Polyatomic Ions02:54

Lewis Structures of Molecular Compounds and Polyatomic Ions

To draw Lewis structures for complicated molecules and molecular ions, it is helpful to follow a step-by-step procedure as outlined:
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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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Fabrication of Low Temperature Carbon Nanotube Vertical Interconnects Compatible with Semiconductor Technology
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在石墨纳米结构中吸附的位置.

Xianwei Sha1, Bret Jackson

  • 1Contribution from the Department of Chemistry, University of Massachusetts, Amherst, MA 01003, USA.

Journal of the American Chemical Society
|October 8, 2004
PubMed
概括
此摘要是机器生成的。

石墨纳米结构中的储存与边缘吸附有关. 第一个原则的计算显示,分子气可以很容易地在齐克扎克的边缘上吸附,形成单或双化结构.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 物理化学 物理化学
  • 纳米技术纳米技术

背景情况:

  • 石墨纳米结构表现出高储能能力.
  • 这种容量可能与边缘的吸附有关.

研究的目的:

  • 在石墨的曲边缘上研究化学吸收的结构和能量.
  • 检查单和双化边缘结构.

主要方法:

  • 使用第一原则计算.
  • 在石墨边缘分析分子的吸附过程.

主要成果:

  • 分子在低激活障碍的石墨边缘上分离吸附.
  • 单一和双重化结构形成.
  • 提出了一种用于吸附的位置的新型模型.

结论:

  • 在石墨的曲边缘上吸附气在能量上是有利的.
  • 这些发现支持边缘在储存中的作用.
  • 拟议的模型为与纳米结构相互作用提供了新的见解.