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Survey Spectra Vs. High Resolution Spectra in XPS Analysis

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 Please subscribe to my channel and share it.