Topic
Chemical state
About: Chemical state is a research topic. Over the lifetime, 2378 publications have been published within this topic receiving 78183 citations.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this paper, the authors used the Auger parameters to identify the chemical states of elements on surfaces of semi-insulating undoped CdTe crystals which suffered from static charging effects, and determined that after chem-mechanical polishing, the Te-rich surface layer was mostly in the pure Te state.
Abstract: X‐ray photoelectron spectroscopy (XPS), Auger electron spectroscopy (AES), and low‐energy electron diffraction (LEED) have been used to study the polar (111)Cd and (111)Te surfaces of intrinsic CdTe crystals. Complementary information on surface composition, chemical state of the surface elements, and surface structure was obtained. The Auger parameters were used to identify the chemical states of elements on surfaces of semi‐insulating undoped CdTe crystals which suffered from static charging effects. With this approach, we were able to determine that after chem‐mechanical polishing, the Te‐rich surface layer was mostly in the pure Te state. Only a trace amount of TeO2 was detectable. Sputtered and vacuum annealed (111) surfaces were found to be stoichiometric: both Cd and Te were in the chemical state of CdTe. Both (111) Cd and (111) Te surfaces showed sixfold symmetric LEED patterns. No evidence of surface reconstruction was found. Angle‐resolved XPS showed no significant difference between 0° and 70° ...
13 citations
TL;DR: In this paper, in situ X-ray absorption fine structure (in situ XAFS) analysis at the Cs K-edge was conducted to investigate the chemical kinetics of Cs species during reaction in an alkali-activated municipal solid waste incineration fly ash (MSWIFA) and pyrophyllite-based system.
13 citations
TL;DR: In this article, the process of low energy N 2 + implantation and annealing of a Cu(0, 0, 1) surface was studied by means of Auger electron spectroscopy (AES), X-ray photoelectron (XPS), and low energy ion spectrometry (LEIS) techniques.
13 citations
TL;DR: In this paper, the chemical state and local environment of Cr dopant in glass through self-limited nanocrystallization is controlled, and interesting wavelength-tunable and ultra-broadband near-infrared (NIR) luminescence with the full width at half maximum (FWHM) of about 380 nm in obtained Cr-activated glass-ceramics are demonstrated.
Abstract: Control of the chemical state and local environment of Cr dopant in glass through self-limited nanocrystallization is presented. Interesting wavelength-tunable and ultra-broadband near-infrared (NIR) luminescence with the full width at half maximum (FWHM) of about 380 nm in obtained Cr-activated glass-ceramics are demonstrated. The results indicate that the presented method may be an effective means of fabricating multifunctional optical gain materials and wideband fiber light sources.
This article is protected by copyright. All rights reserved.
13 citations
TL;DR: In this article, the authors investigated the time transient effect of zinc (Zn) in the porous titanium dioxide formed by micro-arc oxidation (MAO) treatment routinely performed for Zn-containing electrolytes.
Abstract: This study investigated the time transient effect of zinc (Zn) in the porous titanium dioxide formed by micro-arc oxidation (MAO) treatment routinely performed for Zn-containing electrolytes. The aim of our analysis was to understand the changes in both the chemical and biological properties of Zn in physiological saline. The morphology of the Zn-incorporated MAO surface did not change, and a small amount of Zn ions were released at early stages of incubation in saline. We observed a decrease in Zn concentration in the oxide layer because its release and chemical state (Zn2+ compound to ZnO) changed over time during incubation in saline. In addition, the antibacterial property of the Zn-incorporated MAO surface developed at late periods after the incubation process over a course of 28 days. Furthermore, osteogenic cells were able to proliferate and were calcified on the specimens with Zn. The changes related to Zn in saline had non-toxic effects on the osteogenic cells. In conclusion, the time transient effect of Zn in a porous titanium dioxide layer was beneficial to realize dual functions, namely the antibacterial property and osteogenic cell compatibility. Our study suggests the importance of the chemical state changes of Zn to control its chemical and biological properties.
13 citations