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单词 ESCA
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ESCA

英汉-汉英词典
abbr. 化学分析电子光谱学(Electron Spectroscopy for Chemical Analysis)
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ESCA abbr. 化学分析电子光谱学(Electron Spectroscopy for Chemical Analysis)

网络短语:
ESCA technology 光电子能谱化学分析法
angle-dependent ESCA 化学分析电子能谱仪
ESCA analysis ESCA分析
ESCA Tepepan 大学
ESCA or XPS 光电子能谱法
XPS or ESCA 电子能谱仪
中文百科

X射线光电子能谱学 X-ray photoelectron spectroscopy

(重定向自ESCA)
单色X射线光电子能谱系统的基本组件:
*样品通常为固体,因为整个系统处于超高真空(<10-8 torr)。
*聚焦的X射线能量约为1.5keV。
*光电子只能从样品离表面70-110Å的最上层区域逃逸,能量小于1.5keV。
*电子能量分析器专门测量电子的能量,操作值域为0~1.5keV。
*电子探测器计算电子数量。
单色X射线光电子能谱系统的基本组件:
*样品通常为固体,因为整个系统处于超高真空(<10-8 torr)。
*聚焦的X射线能量约为1.5keV。
*光电子只能从样品离表面70-110Å的最上层区域逃逸,能量小于1.5keV。
*电子能量分析器专门测量电子的能量,操作值域为0~1.5keV。
*电子探测器计算电子数量。
XPS系统的内部视图
Basic components of a monochromatic XPS system.

X射线光电子能谱学(英文:X-ray photoelectron spectroscopy,简称XPS)是一种用于测定材料中元素构成、实验式,以及其中所含元素化学态和电子态的定量能谱技术。这种技术用X射线照射所要分析的材料,同时测量从材料表面以下1纳米到10纳米范围内逸出电子的动能和数量,从而得到X射线光电子能谱。X射线光电子能谱技术需要在超高真空环境下进行。

XPS是一种表面化学分析技术,可以用来分析金属材料在特定状态下或在一些加工处理后的表面化学。这些加工处理方法包括空气或超高真空中的压裂、切割、刮削,用于清除某些表面污染的离子束蚀刻,为研究受热时的变化而置于加热环境,置于可反应的气体或溶剂环境,置于离子注入环境,以及置于紫外线照射环境等。

英语百科

X-ray photoelectron spectroscopy X射线光电子能谱学

(重定向自ESCA)
Basic components of a monochromatic XPS system.
Wide-scan or survey spectrum of a somewhat dirty silicon wafer, showing all elements present. A survey spectrum is usually the starting point of most XPS analyses because it shows all elements present on the sample surface and allows one to set up subsequent high-resolution XPS spectra acquisition. The inset shows a quantification table indicating all elements observed, their binding energies, and their atomic percentages.
High-resolution spectrum of an oxidized silicon wafer in the energy range of the Si 2p signal. The raw data spectrum (red) is fitted with five components or chemical states, A through E. The more oxidized forms of Si (SiOx, x = 1-2) appear at higher binding energies in the broad feature centered at 103.67 eV. The so-called metallic form of silicon, which resides below an upper layer of oxidized silicon, exhibits a set of doublet peaks at 100.30 eV (Si 2p1/2) and 99.69 eV (Si 2p3/2). The fact that the metallic silicon signal can be seen
Rough schematic of XPS physics -

X-ray photoelectron spectroscopy (XPS) is a surface-sensitive quantitative spectroscopic technique that measures the elemental composition at the parts per thousand range, empirical formula, chemical state and electronic state of the elements that exist within a material. XPS spectra are obtained by irradiating a material with a beam of X-rays while simultaneously measuring the kinetic energy and number of electrons that escape from the top 0 to 10 nm of the material being analyzed. XPS requires high vacuum (P ~ 10 millibar) or ultra-high vacuum (UHV; P < 10 millibar) conditions, although a current area of development is ambient-pressure XPS, in which samples are analyzed at pressures of a few tens of millibar.

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更新时间:2025/6/17 14:32:17