Based on the the experimental data obtained from elemental analysis and spectrophotometry method, the optimum parameters of curve fitting method were decided: background type: Tougaard, FWHM 1.2, 50% Lorentzian-Gaussian. In this study, XPSpeak 4.1 was used to investigate the functional forms of nitrogen in sewage sludge, peak fitting method was adopted and the best-optimized parameters were determined. Thermal decomposition method is regarded as an important route to treat increasing sewage sludge, while the high content of N causes serious nitrogen related problems, then figuring out the existing form and content of nitrogen of sewage sludge become essential. Parameter setting for peak fitting method in XPS analysis of nitrogen in sewage sludge This finding leads us the claim that the Ag and Cu atoms are in a nanoalloy structure, capped with cystein, as opposed to phase separated entities.« less On the other hand, the C1s, N1s, and S2p peaks of the polyelectrolyte layers shift differently. Accordingly, it is observed that the Cu2p, Ag3d of the metal nanoparticles, and S2p of cysteine, the stabilizer and themore » capping agent, exhibit similar shifts. Dubbed as dynamical XPS, such measurements bring out similarities and differences among the surface structures by correlating the binding energy shifts of the corresponding XPS peaks. These films have been investigated with XPS measurements under square wave excitation at two different frequencies, in order to further our understanding about the chemical/physical nature of the nanoparticles. Taner-Camcı, Merve Suzer, Sefik, E-mail: films consisting of polyelectrolyte layers prepared by layer-by-layer deposition technique and containing also Ag and Cu nanoparticles exhibit superior antibacterial activity toward Escherichia coli. Examples of the uses of these functions are provided herein.ĭynamic XPS measurements of ultrathin polyelectrolyte films containing antibacterial Ag–Cu nanoparticles Practically, both the GLS and the GLP functions can be useful for XPS peak fitting. The GLS and GLP functions are compared to the Voigt function, where the GLS is shown to be a decent approximation of it.
That is, these two functions are not interchangeable. The GLS function better follows the 'wings' of the Lorentzian, while these 'wings' are suppressed in the GLP. There are fundamental differences between the GLS and GLP functions. Plots are shown for GLS and GLP functions with mixing parameters ranging from 0 to 1. Mathematical forms for the GLS and GLP functions are presented with a mixing parameter m. Arguments based on convolution and the Central Limit Theorem are made to justify the use of functions that are intermediate between pure Gaussians and pure Lorentzians in XPS peak fitting. In this article we discuss these functions from a graphical perspective. Functions that have been widely explored and used in XPS peak fitting include the Gaussian, Lorentzian, Gaussian-Lorentzian sum (GLS), Gaussian-Lorentzian product (GLP), and Voigt functions, where the Voigt function is a convolution of a Gaussian and a Lorentzian function.
X-ray photoelectron spectroscopy ( XPS) is arguably the most important vacuum technique for surface chemical analysis, and peak fitting is an indispensable part of XPS data analysis. The Gaussian-Lorentzian Sum, Product, and Convolution (Voigt) functions in the context of peak fitting X-ray photoelectron spectroscopy ( XPS) narrow scans The adsorption behavior of H 2O was discussed from the observation of electronic structure in Li 2O surface. They were attributed to surface -OH and H 2O molecule adsorbed on the surface. After H 2O exposure, a peak broadening and an appearance of a new peak were observed at the higher binding energy region than O(1s) in Li 2O. In O(1s) region, two peaks were observed and they were assigned to O(1s) in precipitated LiOH on the surface and O(1s) in Li 2O. XPS and UPS spectra of Li 2O single crystals which were exposed to different pressure of H 2O vapor were observed. The adsorption behavior of H 2O on Li 2O was studied by X-ray photo electron spectroscopy ( XPS) and ultraviolet photo electron spectroscopy (UPS). Tanaka, Satoru Taniguchi, Masaki Tanigawa, Hisashi XPS and UPS studies on electronic structure of Li 2O
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