The Nb 3d XPS pattern of NCM1 is shown in Fig. 3c. The peaks located at 206.2 eV and 209 eV represent the characteristics of Nb 3d 5/2 and Nb 3d 3/2 , respectively, indicating that the...

Interpretation of XPS spectra. Nb metal gives asymmetric Nb3d peak shapes, but Nb oxides have symmetric peak shapes. Nb3d region has significantly split spin-orbit components (Δ=2.78eV). For Nb oxides, the FWHM of the Nb3d peaks is the same; for Nb metal, the Nb3d 3/2 peak is much broader than the Nb3d 5/2 peak.

1998年4月1日 · XPS analyses performed on the various samples of Nb underline the complexity of the processes that occur during the thermal cycles. In particular, this study shows that the different treatments employed in the preparations of RF cavities produce qualitatively the same chemical composition of the surface, with regard to the first 20 atomic ...

X-ray photoelectron spectroscopy (XPS or ESCA) curve fitting procedures, reference materials and useful notes are listed here to provide a starting point for the consistent interpretation of XPS spectra. These reference pages contain tips and techniques that are designed to help both the novice and advanced XPS user.

The XPS spectrum showed that the three oxides previously observed (NbO, NbO 2 and Nb 2 O 5 ) became almost com- pletely Nb 2 O 5 (at 93 atomic%, Table I), with some trace of NbO 2 (7 at ...

2022年1月1日 · XRR and HR-TEM studies confirm formation of a thin SiO 2 layer on Si substrate. The XPS analysis ensures the formation of NbO 2 -Nb 2 O 5 composition. Change in leakage current is observed depending upon the grain size. The Cole–Cole analysis indicates a dispersive relaxation phenomena in the samples.

Data Collection Settings for Niobium (Nb) Conductivity: Niobium readily develops a native oxide that is sensitive to Flood Gun – Differential Charging Possible – float sample recommended; Primary Peak (XPS Signal) used to measure Chemical State Spectra: Nb (3d 5/2) at 207 eV

The solid Nb-MCM-41 catalysts were characterized to study crystal structure, stability, porosity and acidity by X-Ray diffraction analysis (XRD), thermogravimetric analysis (TGA), N2 adsorption...

This contribution discusses the results of an in situ X-ray photoelectron spectroscopy study of the thermal evolution of the native oxide layer on Nb 3 Sn and pure Nb. X-ray photoelectron spectroscopy (XPS) data were recorded with conventional spectrometers using an Al Kα X-ray source for spectra collected up to 600 °C and a Mg Kα X-ray ...

Despite Nb 2 O 5 as outermost oxide layer, the oxides of Nb compounds show large differences in thickness and in electronic properties. To quantify the differences, angle-resolved XPS (ARXPS) measurements have been performed.