Results 81 to 90 of about 527,698 (329)

Dental caries and weight among children in Nuuk, Greenland, at school entry

open access: yesInternational Journal of Circumpolar Health, 2017
Objective: To explore the possible association between weight class and prevalence of caries among children born 2005-2007, living in Nuuk, Greenland, at time of school entry. Design: A cross-sectional register study based on data from electronic medical
Signe Sloth Madsen   +2 more
doaj   +1 more source

Topological Phase Diagram of BiTeX–Graphene Hybrid Structures

open access: yesApplied Sciences, 2019
Combining graphene with other novel layered materials is a possible way for engineering the band structure of charge carriers. Strong spin-orbit coupling in BiTeX compounds and the recent fabrication of a single layer of BiTeI points towards a feasible ...
Zoltán Tajkov   +3 more
doaj   +1 more source

5,11‐Di(thiophen‐2‐yl)Tetracene: A Novel Tetracene Derivative for Efficient Singlet Fission with Enhanced Physical and Chemical Stability in Thin Films

open access: yesAdvanced Functional Materials, EarlyView.
In this work, a new tetracene derivative, 5,11‐di(thiophen‐2‐yl)tetracene (2T‐Tc) is introduced, exhibiting enhanced physical and chemical stability, and retaining favorable singlet fission kinetics with near unity triplet pair yield in thin films.
Jieun Lee   +11 more
wiley   +1 more source

Preparation, Full Characterization and Theoretical Studies for New Herniarin derivatives [PDF]

open access: yesEngineering and Technology Journal, 2017
Novel Herniarin compounds were prepared and identified by UV–VIS, FTIR, NMR spectra. Theoretical Studies and molecular structure with optimized geometry were done by utilizing Density functional theory for the prepared ...
K.F. AL-Azawi
doaj   +1 more source

The physics of single-side fluorination of graphene: DFT and DFT + U studies [PDF]

open access: yesCarbon, 2019
Abstract We present density functional theory (DFT) calculations of the electronic and magnetic properties of fluorine adatoms on a single side of a graphene monolayer. By extrapolating the results, the binding energy of a single fluorine adatom on graphene in the dilute limit is calculated.
F. Marsusi   +2 more
openaire   +3 more sources

Unique Performance Considerations for Printable Organic Semiconductor and Perovskite Radiation Detectors: Toward Consensus on Best Practice Evaluation

open access: yesAdvanced Functional Materials, EarlyView.
A lack of standard approaches for testing and reporting the performance of metal halide perovskites and organic semiconductor radiation detectors has resulted in inconsistent interpretation of performance parameters, impeding progress in the field. This Perspective recommends key metrics and experimental details, which are suggested for reporting in ...
Jessie A. Posar   +8 more
wiley   +1 more source

Efficacy of the DFT+U formalism for modeling hole polarons in perovskite oxides

open access: yes, 2014
We investigate the formation of self-trapped holes (STH) in three prototypical perovskites (SrTiO3, BaTiO3, PbTiO3) using a combination of density functional theory (DFT) calculations with local potentials and hybrid functionals.
Erhart, Paul   +3 more
core   +1 more source

Photoswitchable Conductive Metal–Organic Frameworks

open access: yesAdvanced Functional Materials, EarlyView.
A conductive material where the conductivity can be modulated remotely by irradiation with light is presented. It is based on films of conductive metal–organic framework type Cu3(HHTP)2 with embedded photochromic molecules such as azobenzene, diarylethene, spiropyran, and hexaarylbiimidazole in the pores.
Yidong Liu   +5 more
wiley   +1 more source

The interaction of morin and morin-5’-sulfonic acid with lead(II): Study of the 1:1 complex formation process in aqueous solution

open access: yesMain Group Metal Chemistry, 2019
This article focuses on the aqueous complexation between two flavonoids (morin and morinsulfonate) and Pb2+ at constant ionic strength I=0.5 M (NaClO4). The determination of stability constants of ML complexes were performed at wide pH range.
Lutoshkin Maxim A.   +2 more
doaj   +1 more source

Electro-Magnetic Behavior of Highly Correlated Fluorides KFeF3, KCoF3 and KNiF3: A Comparative Ab-initio Study of Cation Effect

open access: yesAnnals of West University of Timisoara: Physics, 2020
Fluorides-based perovskites are currently the typical materials being used in spintronic devices, optoelectronic and magneto-resistance colossal fields. Solar cells made of Fluoro-perovskite hold much promise for the future of solar energy.
Filalli Sihem, Hamdad Noura
doaj   +1 more source

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