.jpg "si2p xps peak fitting")
Copy/Move the folder 'XPSTHelp' to the folder 'Igor Help Files' in Igor's main folderīefore you upgrade to a newer version of XPST, please remove all files associated with your old version from Igor's folders.Copy/Move the folder 'XPST' to the folder 'Igor Procedures' in Igor's main folder.
#Si2p xps peak fitting download#
If you still run Igor 6, you have to download a previous release. The Igor 7/8 version is not compatible with Igor 6. XPST was initially developed with Igor 5, but a major revision was made with Igor 7. Several changes in the newest version of XPST were made according to this book about programming Igor. There is also a youtube channel with tutorials. As a special feature, a flexible multiplet function was implemented to facilitate a convenient analysis of complex spectra. You can generate fit templates and you can export entire fit projects to share them with your co-workers. When a XPST fit project is started, a corresponding subfolder with all required data is generated and saved within the Igor experiment. It includes various graphical interfaces as well as commandline functions to facilitate the workup of XPS data. XPST is a program package for the analysis of X-ray Photoelectron Spectroscopy (XPS) data.
Although Ni is bonded to oxide in these phases, Ni2p binding energies differ substantially, and reflect primarily the nature of the ligand (O2−, OH−, SO4 2−) to which Ni is bonded. NiO, Ni(OH)2, and NiSO4 are insulators in which Ni is divalent and is bonded to oxygen. Because only the core Ni2p electron and nonbonding orbitals of predominantly metallic character are affected, the main peak of all three conductors are affected similarly, leading to similar Ni2p3/2 main peak binding energies. These conduction band orbitals become localized on the Ni photoion (and sometimes filled) in response to the field created by the photoemission event. The major contribution is that associated with the electrostatic field produced by ejection of the Ni(2p) photoelectron, the minor contribution is the relaxation energy associated with filling unoccupied, conduction band 3d9 and 4s Ni metal orbitals. Ni2p3/2 peak structures and binding energies reflect two energetic contributions. Ni2p3/2 X-ray photoelectron spectral peak binding energies of Ni metal, NiS, and NiAs (all conductors) span a range of about 0.5 eV and are, consequently, insensitive to formal Ni oxidation state and to the nature of the ligand to which Ni is bonded, relative to other metals (e.g., Fe). A scheme for fitting these spectra using multiplet envelopes is proposed.
#Si2p xps peak fitting free#
It may involve contributions from inter-atomic, non-local electronic coupling and screening effects with multiplet structures significantly different from the free ions as found for MnO. Fitting the NiO Ni 2p spectral profile is not as straightforward as the hydroxide and oxyhydroxide. It is shown that the free ion multiplet envelopes for Ni2+ and Ni3+ simulate the main line and satellite structures for Ni(OH)2 and NiOOH. The assignments of Ni 2p states are re-examined with intra-atomic multiplet envelopes applied to Ni(OH)2, NiOOH and NiO spectra. Multiplet splittings have been shown to be necessary for assignment of Fe 2p and Cr 2p spectral profiles and chemical states. A current interpretation of Ni 2p spectra of oxides and other compounds is based on charge transfer assignments of the main peak at 854.6 eV and the broad satellite centred at around 861 eV to the cd9L and the unscreened cd8 final-state configurations, respectively (L is a ligand hole). The satellite near 6 eV is attributed to a predominant surface plasmon loss. We report REELS observation in AES at low voltages of losses (plasmons and inter-band transitions) corresponding to the satellite structures in Ni metal 2p spectra. A current interpretation of XPS spectra of Ni metal assumes that the main 6 eV satellite is due to a two hole c3d94s2 (c is a core hole) final state effect.
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