Elemental shift of XPS peaks

Microscopic Characterization
Category General
Difficulty Level Normal
Audience Level General
Description Microscopic characterization methods refer to scientific techniques Which allow determination of both composition and structure of a material. Optical microscopy, scanning probe microscopy and electron microscopy are known as microscopic techniques. This course illustrates how microscopic characterization techniques are used.
Overview
Microscopic methods play an essential role in nanomaterials characterization. Microscopic and X-ray based characterization of nanomaterials techniques are used for the determination of surface morphology and dispersion characteristics of nanomaterials. This course deals with details of these aspects, and will provide a fundamental understanding of morphological tools, such as instrumentation, sample preparation and different kinds of analyses, etc.


Booklet
Description
 Photoelectric peaks shift in EB with difference of X-ray photon energy hν, when another excitation source is used. The shift in XPS peaks can be grouped as elemental shift or chemical shift. Position of orbitals in atom is sensitive to chemical environment of atom. For different chemical bonds of elements, different peak components can appear. Sometimes there is no additional peak but the energy shift of main element peak is observed. These energy shifts which is called chemical shifts are used to interpret the bonding of elements.
Mental Challenge
 What does the binding energy peak position of an element depend on?
Quizzes and Activities
 Activity: Discuss how the chemical shifts happen. Use an example of the lithium 1s levels in lithium metal and lithium oxide.
Further Reading Sources
 1.http://mafija.fmf.uni-lj.si/seminar/files/2013_2014/XPS024.pdf 

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