How to Analyse XPS Data / Plot / Graph / in Research Paper?
This video explains how to interpret XPS data in research paper or Thesis | Dissertation?
As we know that in XPS, we have to take two spectra i.e., Survey Spectra & high resolution Spectra
We have to write details about the survey spectra first then follow the details interpretation of individual main peaks.
Survey Spectra vs. High Resolution Spectra
Both survey spectra & high-resolution spectra are required for a complete a surface analysis of the sample i.e., what elements are present and what are their chemical states.
Survey Spectra:
It is also called Broad Scan, Broad overview
Purpose: Elemental identification & qualitative analysis
Energy Range: Broad (focused on all peaks) (0 to 1400 eV)
Resolution: Lower and the separation of peaks can not be seen clearly
Acquisition Time: Shorter
Data: Types of elements only
Peak Identification: Peaks corresponding to different elements are identified based on their characteristic binding energies.
Surface Contaminants: Common contaminants like carbon (C 1s) and oxygen (O 1s) can be easily identified
Relative Abundance: The relative intensities of the peaks can give an approximate indication of the relative amounts of the elements present
Deconvolution on a survey spectrum is NOT a good idea.
Now let's discuss the other one.
High Resolution Spectra:
It is also called in-depth overview
Purpose: Chemical state analysis and quantitative analysis
Energy Range: Narrow (focused on specific peaks) (~ 20 eV)
Resolution: Higher Spin orbit separation (Δ) can be seen
Acquisition Time: Longer
Data: Determines the chemical states and concentrations of the elements.
Peak Deconvolution: Detailed analysis can deconvolute overlapping peaks to identify different chemical states (e.g., different oxidation states of the same element)
Quantitative Analysis: The areas under the peaks can be used for quantitative analysis to determine the concentration of different chemical states.
Chemical Shifts: Small shifts in peak positions can provide insights into the chemical bonding environment and changes in electronic structure
Deconvolution is fine on a high-res spectrum
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