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相关概念视频

Scanning Electron Microscopy01:07

Scanning Electron Microscopy

A scanning electron microscope (SEM) is used to study the surface features of a sample by using an electron beam that scans the sample surface in a two-dimensional manner. Typically, areas between ~1 centimeter to 5 micrometers in width can be imaged. SEM can be used to image bacteria, viruses, tissues as well as larger samples like insects. Conventional SEM gives a magnification ranging from 20X to 30,000X and spatial resolution of 50 to 100 nanometers.
Fundamental Principles
Accelerated...
Atomic Force Microscopy01:08

Atomic Force Microscopy

Atomic force microscopy (AFM) is a type of scanning probe microscopy that can analyze topographic details of various specimens like ceramics, glass, polymers, and biological samples. AFM offers over 1000 times more resolution than the optical imaging system. Images generated from AFM are three-dimensional surface profiles, offering an advantage over the flat, two-dimensional images from other imaging techniques.
The AFM Probe
The probe is regarded as the heart of any AFM setup and comprises the...

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相关实验视频

Updated: Jun 13, 2026

Quantitative and Qualitative Examination of Particle-particle Interactions Using Colloidal Probe Nanoscopy
13:15

Quantitative and Qualitative Examination of Particle-particle Interactions Using Colloidal Probe Nanoscopy

Published on: July 18, 2014

在纳米结构中可视化电子散射力.

Chenggang Tao1, W G Cullen, E D Williams

  • 1Materials Research Science and Engineering Center and Department of Physics, University of Maryland, College Park, MD 20742-4111, USA.

Science (New York, N.Y.)
|May 8, 2010
PubMed
概括
此摘要是机器生成的。

在纳米金属电线中的电迁移是复杂的. 这项研究揭示了原子岛屿与电子流相反移动,其速度与大小相反,C60吸附剂显著减少了这种力.

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Studying Dynamic Processes of Nano-sized Objects in Liquid using Scanning Transmission Electron Microscopy
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Studying Dynamic Processes of Nano-sized Objects in Liquid using Scanning Transmission Electron Microscopy

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Sub-nanometer Resolution Imaging with Amplitude-modulation Atomic Force Microscopy in Liquid
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Sub-nanometer Resolution Imaging with Amplitude-modulation Atomic Force Microscopy in Liquid

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相关实验视频

Last Updated: Jun 13, 2026

Quantitative and Qualitative Examination of Particle-particle Interactions Using Colloidal Probe Nanoscopy
13:15

Quantitative and Qualitative Examination of Particle-particle Interactions Using Colloidal Probe Nanoscopy

Published on: July 18, 2014

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10:29

Studying Dynamic Processes of Nano-sized Objects in Liquid using Scanning Transmission Electron Microscopy

Published on: February 5, 2017

Sub-nanometer Resolution Imaging with Amplitude-modulation Atomic Force Microscopy in Liquid
10:25

Sub-nanometer Resolution Imaging with Amplitude-modulation Atomic Force Microscopy in Liquid

Published on: December 20, 2016

科学领域:

  • 材料科学 材料科学 材料科学
  • 凝聚物质物理学 凝聚物质物理学
  • 表面科学是一门学科.

背景情况:

  • 电子迁移通过电子动量转移驱动纳米金属线的结构变化.
  • 电迁移的微观机制,特别是涉及缺陷的,仍然很复杂,需要详细的研究.

研究的目的:

  • 调查热激发缺陷对单原子岛屿在Ag上的电迁移的影响.
  • 为了阐明岛屿大小,电流方向和原子运动之间的关系.
  • 探索使用吸附剂控制电迁移力的方法.

主要方法:

  • 现场扫描道显微镜 (STM) 用于观察单晶Ag上的单原子岛屿.
  • 在电流偏差下的岛屿的移位速度被测量为不同的岛屿半径 (2-50 nm).
  • 分析了C60吸附剂对岛屿运动和电迁移力的影响.

主要成果:

  • 单原子岛屿表现出与电子流动方向相反的位移.
  • 发现岛屿的速度与岛屿半径成反比例.
  • 添加C60使边界原子的电迁移力减少了超过10的因素.
  • 在岛边的原子缺陷点的低协调被确定为大力的可能来源.

结论:

  • 这项研究澄清了缺陷在电迁移中的作用,表明力量作用于边缘缺陷部位.
  • 岛屿的大小和吸附剂的存在是调节电迁移的关键因素.
  • 了解这些纳米级力量对于设计可靠的金属纳米结构至关重要.