评估扫描电子显微镜用于测量小规模地形
Vimanyu Chadha1, Nathaniel C Miller1, Ruikang Ding1
1Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, PA 15261.
概括
扫描电子显微镜 (SEM) 提供了一种简单的方法来测量小规模的表面地形,其性能优于100 nm以下的原子力显微镜 (AFM). 这种技术可以在广泛的尺度上提高表面性能预测.
科学领域:
- 材料科学与工程 材料科学与工程
- 表面计量学 表面计量学
- 纳米技术纳米技术
背景情况:
- 预测表面性能依赖于多尺度地形分析,这超过了标准粗度指标.
- 现有的表面特征化工具在测量整个范围的表面特征大小方面存在局限性.
- 扫描电子显微镜 (SEM) 在系统测量小规模地形学方面的潜力得到了探索.
研究的目的:
- 评估扫描电子显微镜 (SEM) 的有效性,用于系统地测量小规模的表面地形.
- 开发和验证一种简单,灵活的基于SEM的程序,适用于各种材料和几何形状.
- 将SEM衍生地形测量与其他技术比较,如原子力显微镜 (AFM) 和传输电子显微镜 (TEM).
主要方法:
- 为了进行SEM分析,建立了四种不同的样本准备方法.
- 在准备的样本中使用SEM进行了定量地形测量.
- 使用功率光谱密度 (PSD) 分析来比较来自SEM,AFM和TEM的地形数据.
主要成果:
- 与AFM相比,SEM拓测量在100 nm以下的尺度上显示出更高的性能.
- 在统计学上,SEM测量与劳动密集型TEM测量在16nm以下是无法区分的.
- 基于SEM的地形测量的局限性被量化并进行了彻底的讨论.
结论:
- 使用SEM开发了一种简单的,可通用的方法,用于揭示小规模的表面地形.
- 将SEM与传统的笔形状测量相结合,可以在近七个数量级 (1厘米到16纳米) 的表面地形描述.
- 这种全面的地形特征化有助于物理模型的应用,以准确地预测表面性能.
相关概念视频
Scanning Electron Microscopy
4.1K
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...
Fundamental Principles
Accelerated...
4.1K
Overview of Microscopy Techniques
9.7K
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...
9.7K
Overview of Electron Microscopy
8.5K
The wavelengths of visible light ultimately limit the maximum theoretical resolution of images created by light microscopes. Most light microscopes can only magnify 1000X, and a few can magnify up to 1500X. Electrons, like electromagnetic radiation, can behave like waves, but with wavelengths of 0.005 nm, they produce significantly greater resolution up to 0.05 nm as compared to 500 nm for visible light. An electron microscope (EM) can create a sharp image that is magnified up to 2,000,000X.
8.5K
Electron Microscope Tomography and Single-particle Reconstruction
2.3K
Transmission electron microscopy (TEM) can be used to determine the 3D structure of biological samples with the help of techniques such as electron microscope tomography and single-particle reconstruction. While single-particle reconstruction can examine macromolecules and macromolecular complexes in vitro conditions only, tomography permits the study of cell components or small cells in vivo.
Electron Tomography
Electron tomography can be performed either in TEM or STEM (scanning transmission...
Electron Tomography
Electron tomography can be performed either in TEM or STEM (scanning transmission...
2.3K
Atomic Force Microscopy
3.3K
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...
The AFM Probe
The probe is regarded as the heart of any AFM setup and comprises the...
3.3K


