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Overview of Microscopy Techniques01:22

Overview of Microscopy Techniques

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The early pioneers of microscopy opened a window into the invisible world of microorganisms. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes that leveraged nonvisible light, such as fluorescence microscopy that uses an ultraviolet light source and electron microscopy that uses short-wavelength electron beams. These advances significantly improved magnification, image resolution, and contrast. By comparison, the...
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Atom Probe Tomography Studies on the CuIn,GaSe2 Grain Boundaries
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用光学显微镜探测石墨烯颗粒边界.

Dinh Loc Duong1, Gang Hee Han, Seung Mi Lee

  • 1Sungkyunkwan Advanced Institute of Nanotechnology, Sungkyunkwan University, Suwon 440-746, South Korea.

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|October 5, 2012
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概括

本研究引入了一种光学显微镜方法,可以在没有样本转移的情况下可视化大面积的石墨烯粒边界. 该技术揭示了这些边界如何影响电气性能和机械完整性,为材料科学提供了一个新的工具.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 纳米技术 纳米技术
  • 表面科学是一门学科.

背景情况:

  • 石墨烯颗粒边界影响材料特性和设备性能.
  • 目前研究谷物边界的现有方法缺乏大规模的可访问性.
  • 了解粒度边界分布对于先进的材料应用至关重要.

研究的目的:

  • 开发一种用于可视化大面积石墨烯粒边界的直接光学显微镜技术.
  • 为了研究石墨烯颗粒大小,板电阻和机械性能之间的关系.
  • 建立一种用于分析二维材料中的粒度边界的多功能协议.

主要方法:

  • 在铜上生长的石墨烯的光学显微镜成像.
  • 选择性铜氧化通过紫外线照射和在粒边界的基质功能化.
  • 密度函数计算,以了解激素扩散机制.
  • 板材阻力测量和机械曲试验.

主要成果:

  • 在没有转移的情况下,在大面积石墨烯中直接可视化颗粒边界.
  • 通过功能化的粒度边界证明了选择性铜氧化.
  • 观察到板材阻力下降与石墨烯颗粒大小增加.
  • 想象了谷物边界对裂传播的影响.

结论:

  • 开发的光学显微镜技术提供了对石墨烯粒边界的大规模直接观察.
  • 石墨烯颗粒边界显著影响电气和机械性能.
  • 这种方法提供了一个简单的协议,适用于其他二维分层材料,如化和粘土.