photoelectron spectroscopy
Quick Summary
Photoelectron spectroscopy is an instrumental method used to determine the chemical composition of a material's surface. It works by bombarding a sample with high-energy radiation, such as X-rays or ultraviolet light, and then measuring the kinetic energies of the electrons that are ejected from the surface. This technique is an extension of the photoelectric effect.12
The energy of the ejected electrons, along with the energy of the incident radiation, allows scientists to calculate the ionization energy of the electrons within the material's atoms or molecules. This information reveals details about the chemical state and oxidation states of elements present on the surface. Photoelectron spectroscopy can detect all elements except hydrogen and helium.23
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