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Updated: May 12, 2026

Angle-resolved Photoemission Spectroscopy At Ultra-low Temperatures
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热电子扩散,电子 - 声子合和表面原子对金属表面动态的影响,通过反射超快电子衍射反射揭示

Xing He1, Mithun Ghosh1, Ding-Shyue Yang1

  • 1Department of Chemistry, University of Houston, Houston, Texas 77204, USA.

The Journal of chemical physics
|June 10, 2024
PubMed
概括

超快速电子衍射揭示了激光激发后热电子扩散如何影响金属表面动态. 这项研究揭示了金的独特表面行为,与预测不同.

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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.
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In atomic emission spectroscopy (AES), high-temperature atomizers excite a broad range of elements and molecules that generate complex emissions from sources such as oxides, hydroxides, and flame combustion products in the flame or plasma. Several strategies can be employed to minimize spectral interferences caused by overlapping emission lines or bands. These include increasing instrument resolution, choosing alternative emission lines, optimally placing the detector in low-background regions,...
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