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Valency

About: Valency is a research topic. Over the lifetime, 1632 publications have been published within this topic receiving 26141 citations.


Papers
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Journal ArticleDOI
TL;DR: The application to the Fe−H 2 O system is described and it is shown that at temperature around 250°C a reaction not normally considered as part of the system becomes relevant.

22 citations

Journal ArticleDOI
TL;DR: In this article, photoelectron spectra of calaverite, AuTe2, show a Au 5d band extending from -3 to -8 eV below the Fermi energy, indicating that all Au atoms have the same valency.
Abstract: Photoelectron spectra of calaverite, AuTe2, show a Au 5d band extending from -3 to -8 eV below the Fermi energy. Photoemission peaks from Au 4f core levels are sharp, indicating that all Au atoms have the same valency. The binding energies of Au 4f electrons in AuTe2 and metallic Au are approximately the same. According to these observations all Au atoms in AuTe2 are monovalent Au(I). Photoelectron spectra of Te 4d and 3d core levels show single sharp peaks, characteristic of a single valency for Te. These investigations clearly establish the absence of appreciable valency fluctuations or mixed valency Au(I)-Au(III) in AuTe2.

22 citations

Journal ArticleDOI
TL;DR: In this paper, a procedure has been developed for preparation of clean surfaces of oxide superconductors for study by electron spectroscopy, which involves annealing ceramic or thin film samples under an oxygen atmosphere in a preparation chamber.
Abstract: A procedure has been developed for preparation of clean surfaces of oxide superconductors for study by electron spectroscopy. This involves annealing ceramic or thin film samples under an oxygen atmosphere in a preparation chamber that is an integral part of the spectrometer UHV system. The technique has allowed us to obtain high quality spectroscopic data from YBa,Cu,O,-, , Bi2Sr2Can-,Cun04+2n (n = 2, 3) and La2-,Sr,Cu04. Our results are considered in relation to other contemporary work. Current areas of controversy will be highlighted, including a discussion of Fermi edge and satellite structure in valence region spectra and evidence for mixed valency in Cu : 2p and 0 : 1s core regions.

21 citations

Journal ArticleDOI
TL;DR: In this paper, the density functional theory is applied to a study of the structure and differential capacitance of a planar electric double layer formed by a valency asymmetric mixture of charged dimers and monomers.

21 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202377
2022190
202119
202029
201937
201829