Question
What information does the energy dispersive spectroscopy (EDS) provide? Write any three applications of EDS.
Answer :
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Energy dispersive spectroscopy (EDS) is an analytical technique used to determine the elemental composition of materials. It works in conjunction with electron microscopy, typically scanning electron microscopy (SEM) or transmission electron microscopy (TEM). When a high-energy electron beam strikes the sample, it excites inner-shell electrons of the atoms in the material. The subsequent relaxation of higher-energy electrons to fill these vacancies results in the emission of characteristic X-rays. EDS detects these X-rays and measures their energies, which are unique for each element, allowing qualitative and quantitative identification of elements present in the sample. The spectrum generated by EDS provides peaks
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