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Chemical state
About: Chemical state is a research topic. Over the lifetime, 2378 publications have been published within this topic receiving 78183 citations.
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TL;DR: In this article, a large set of high-resolution core-level and Auger spectra was recorded as a function of temperature and time, and some Co-related XPS characteristics were found to be sensitive to the local chemical and structural environment of Co atoms, demonstrating non-monotonic variation in the temperature range of intense dehydration.
4 citations
01 Jan 2005
TL;DR: In this paper, the position of nanodiamonds in the genealogical series of products from functional derivatives of adamantine to diamond macrocrystals with different surface functional groups was considered.
Abstract: The position of nanodiamonds in the genealogical series of products from functional derivatives of adamantine to diamond macrocrystals with different surface functional groups was considered. The change of the chemical state of nanodiamond particles resulted in gas treatment was investigated by the method of IR spectroscopy. It was suggested on the basis of spectral data and elemental analysis that nitrogen can be mainly in the form of impurity N-centers of different kind inside diamond core of nanodiamond particle. The specific features of nanodiamond oxidation are considered. The opinion is stated that they are connected with the high relative content of functional surface groups and their nature.
4 citations
TL;DR: In this article, the dependence of the composition, diffusion behavior, and chemical state of the systems on different annealing conditions and substrate pretreatment procedures has been investigated, thus yielding different electronic properties of the metal-semiconductor contacts.
Abstract: Metallic overlayers of platinum, copper, and gold on a p‐doped mercury cadmium telluride substrate have been depth profiled by 5 keV Ar+ sputtering and analyzed with Auger and photoelectron spectroscopy, secondary ion, and secondary neutral mass spectroscopy. The dependence of the composition, diffusion behavior, and chemical state of the systems on different annealing conditions and substrate pretreatment procedures has been investigated. Depending on the metal, these features can differ very strongly, thus yielding different electronic properties of the metal–semiconductor contacts.
4 citations
31 Oct 2017
TL;DR: In situ near-edge X-ray absorption fine structure (NEXAFS) spectroscopy and density functional theory calculations indicate that the presence of Cu in the MnO2–CuO catalyst enables the release of oxygen at lower temperatures.
Abstract: In situ near-edge X-ray absorption fine structure (NEXAFS) spectroscopy and density functional theory calculations were conducted to demonstrate the decomposition mechanism of propylene glycol methyl ether acetate (PGMEA) on a MnO2–CuO catalyst. The catalytic activity of MnO2–CuO was higher than that of MnO2 at low temperatures, although the pore properties of MnO2 were similar to those of MnO2–CuO. In addition, whereas the chemical state of MnO2 remained constant following PGMEA dosing at 150 °C, MnO2–CuO was reduced under identical conditions, as confirmed by in situ NEXAFS spectroscopy. These results indicate that the presence of Cu in the MnO2–CuO catalyst enables the release of oxygen at lower temperatures. More specifically, the released oxygen originated from the Mn–O–Cu moiety on the top layer of the MnO2–CuO structure, as confirmed by calculation of the oxygen release energies in various oxygen positions of MnO2–CuO. Furthermore, the spectral changes in the in situ NEXAFS spectrum of MnO2–CuO fol...
4 citations
TL;DR: In this paper, an Auger parameter analysis has been carried out to identify the differences in the chemical states of Na in CIGSe, originating from two different sources: the soda-lime glass substrate (Na-SLG) and from a post-deposition treatment (Na)-PDT).
4 citations