Results 31 to 40 of about 341,546 (125)

Elemental depth profiling of fluoridated hydroxyapatite by X-ray photoelectron spectroscopy [PDF]

open access: yesarXiv, 2008
Structural and chemical changes that arise from a fluoridation of synthetic hydroxyapatite in neutral and acidic fluoridation agents are investigated. For synthetic hydroxyapatite (Ca5(PO4)3OH = HAp), the elemental depth profiles were determined by X-ray photoelectron spectroscopy (XPS) to reveal the effect of fluoridation in nearly neutral (pH = 6.2 ...
arxiv  

Superionic Fluoride Gate Dielectrics with Low Diffusion Barrier for Advanced Electronics [PDF]

open access: yesarXiv
Exploration of new dielectrics with large capacitive coupling is an essential topic in modern electronics when conventional dielectrics suffer from the leakage issue near breakdown limit. To address this looming challenge, we demonstrate that rare-earth-metal fluorides with extremely-low ion migration barriers can generally exhibit an excellent ...
arxiv  

Comparison of polarization and Born effective charges in alternatively-deflected zigzag and planar-zigzag $beta$-poly(vinylidene fluoride) [PDF]

open access: yesarXiv, 2004
A density-functional study of the alternatively-deflected zigzag structure for the beta-phase of poly(vinylidene fluoride) or (-CH2-CF2-)n is presented. Structure, polarization and effective charges have been determined. Using lattice constants and atomic positions transformed from experiment, the space group for the alternatively-deflected zigzag ...
arxiv  

Spatially Directional Dual-Attention GAT for Spatial Fluoride Health Risk Modeling [PDF]

open access: yesarXiv
Environmental exposure to fluoride is a major public health concern, particularly in regions with naturally elevated fluoride concentrations. Accurate modeling of fluoride-related health risks, such as dental fluorosis, requires spatially aware learning frameworks capable of capturing both geographic and semantic heterogeneity. In this work, we propose
arxiv  

First Results of Tokyo Dark Matter Search with a Lithium Fluoride Bolometer [PDF]

open access: yesarXiv, 1997
The First results of the Tokyo dark matter search programme using a 21-g lithium fluoride bolometer are presented. The background spectrum was measured in the surface laboratory. We derive an exclusion plot for the spin-dependently coupled Weakly Interacting Massive Particles (WIMPs) cross section.
arxiv  

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