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Preparation of Samples for Electron Microscopy01:20

Preparation of Samples for Electron Microscopy

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To be visualized by an electron microscope, either transmission or scanning, biological samples need to be fixed (stabilized) so the electron beam does not destroy them and dried thoroughly (desiccated/dehydrated) so the vacuum does not affect them. Fixation needs to be done as quickly as possible because the sample properties will start changing as soon as it is removed from its natural environment. For example, in a tissue sample, the oxygen levels begin decreasing, causing an altered...
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In Situ Transmission Electron Microscopy with Biasing and Fabrication of Asymmetric Crossbars Based on Mixed-Phased a-VOx
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使用聚焦离子束准备基于MEMS的芯片样本的自我调整的保护罩.

Haozhe Lu1, Chuanhong Jin2

  • 1State Key Laboratory for Silicon and Advanced Semiconductor Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, Zhejiang 310027, PR China; Jihua Laboratory, Foshan, Guangdong 528200, PR China.

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概括
此摘要是机器生成的。

一种新的自我调整的保护屏蔽方法在聚焦离子束 (FIB) 准备用于传输电子显微镜 (TEM) 期间保护光束敏感的纳米结构. 这种技术可以防止离子束损伤,确保微电机系统 (MEMS) 设备的高质量标本.

关键词:
污染物污染物是一种污染物.在FIB上,FIB就是FIB.Ga(+) 的损坏情况.低损伤样品准备方法 低损伤样品准备方法基于MEMS的芯片样本准备方法

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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
  • 电子显微镜电子显微镜

背景情况:

  • 聚焦离子束 (FIB) 准备对于传输电子显微镜 (TEM) 至关重要,但在现场微电机系统 (MEMS) 芯片样本准备方面面临挑战.
  • 将样品转移到MEMS芯片通常需要阶段倾斜,导致离子束损伤,重新放置和污染,特别是对于像对齐的单壁碳纳米管阵列 (A-CNTs) 这样的光束敏感材料.

研究的目的:

  • 开发一种新的方法来制备高质量的TEM横截面面膜片,用于基于MEMS的现场芯片.
  • 为了减轻离子束诱导的损伤,重置,在精细的纳米结构的准备过程中污染.

主要方法:

  • 开发了一种使用双束FIB系统中电子和离子束之间的角度偏移来实现自我调整的保护屏蔽方法.
  • 该技术在关键处理步骤中屏蔽了感兴趣的区域 (ROI),与标准采样方法兼容.

主要成果:

  • 保护屏蔽方法有效地防止了离子束诱导的损伤,重新放置和污染.
  • 对-A-CNT-氧化多层的实验表明,在扫描TEM (STEM) 成像中,增强了接口完整性和结构清晰度.

结论:

  • 开发的方法为准备高质量的TEM片用于in-situ MEMS芯片提供了强大而通用的解决方案.
  • 这种方法广泛适用于对离子束敏感的材料,提高了先进设备分析的样品质量.