Search results for "mono"
showing 10 items of 6843 documents
Comparative theoretical study of the Ag–MgO (100) and (110) interfaces
1999
We have calculated the atomic and electronic structures of Ag–MgO(100) and (110) interfaces using a periodic (slab) model and an ab initio Hartree–Fock approach with a posteriori electron correlation corrections. The electronic structure information includes interatomic bond populations, effective charges, and multipole moments of ions. This information is analyzed in conjunction with the interface binding energy and the equilibrium distances for both interfaces for various coverages. There are significant differences between partly covered surfaces and surfaces with several layers of metal, and these can be understood in terms of electrostatics and the electron density changes. For complet…
Integrative analysis of the mineralogical and chemical composition of modern microbialites from ten Mexican lakes: What do we learn about their forma…
2021
International audience; Interpreting the environmental conditions under which ancient microbialites formed relies upon comparisons with modern analogues. This is why we need a detailed reference framework relating the chemical and mineralogical compositions of modern microbialites to the physical and chemical parameters prevailing in the environments where they form. Here, we measured the chemical, including major and trace elements, and mineralogical composition of microbialites from ten Mexican lakes as well as the chemical composition of the surrounding waters. Saturation states of lakes with different mineral phases were systematically determined and correlations between solution and so…
CCDC 906037: Experimental Crystal Structure Determination
2013
Related Article: B.P.Waldron, D.Parker, C.Burchardt, D.S.Yufit, M.Zimny, F.Roesch|2013|Chem.Commun.|49|579|doi:10.1039/c2cc37544c
CCDC 840696: Experimental Crystal Structure Determination
2012
Related Article: E.Colacio, J.E.Perea-Buceta, A.J.Mota, E.K.Brechin, A.Prescimone, M.Hanninen, P.Seppala, R.Sillanpaa|2012|Chem.Commun.|48|805|doi:10.1039/c1cc16590a
CCDC 1047964: Experimental Crystal Structure Determination
2015
Related Article: Wdeson P. Barros, M. Luisa Calatayud, Francesc Lloret, Miguel Julve, Nadia Marino, Giovanni De Munno, Humberto O. Stumpf, Rafael Ruiz-García, Isabel Castro|2016|CrystEngComm|18|437|doi:10.1039/C5CE02058A
CCDC 664106: Experimental Crystal Structure Determination
2010
Related Article: A.Ray, C.Rizzoli, G.Pilet, C.Desplanches, E.Garribba, E.Rentschler, S.Mitra|2009|Eur.J.Inorg.Chem.||2915|doi:10.1002/ejic.200900188
CCDC 248619: Experimental Crystal Structure Determination
2005
Related Article: D.C.de C.Gomes, H.O.Stumpf, F.Lloret, M.Julve, V.Gonzalez, H.Adams, J.A.Thomas|2005|Inorg.Chim.Acta|358|1113|doi:10.1016/j.ica.2004.10.038
Spin filtering by proximity effects at hybridized interfaces in spin-valves with 2D graphene barriers
2020
We report on spin transport in state-of-the-art epitaxial monolayer graphene based 2D-magnetic tunnel junctions (2D-MTJs). In our measurements, supported by ab-initio calculations, the strength of interaction between ferromagnetic electrodes and graphene monolayers is shown to fundamentally control the resulting spin signal. In particular, by switching the graphene/ferromagnet interaction, spin transport reveals magneto-resistance signal MR > 80% in junctions with low resistance × area products. Descriptions based only on a simple K-point filtering picture (i.e. MR increase with the number of layers) are not sufficient to predict the behavior of our devices. We emphasize that hybridization …
Pressure-induced instability of the fergusonite phase of EuNbO4 studied by in situ Raman spectroscopy, x-ray diffraction, and photoluminescence spect…
2020
In this article, we present high-pressure experimental investigations on EuNbO4, an interesting technologically important material, using synchrotron based x-ray powder diffraction, Raman spectroscopy, and europium photoluminescence measurements up to 39.2, 31.6, and 32.4 GPa, respectively. All three techniques show the stability of the ambient monoclinic phase until 20 GPa. Beyond that, a pressure-induced structural phase transition takes place with the coexistence of two phases over a wide pressure range. The structure of the high-pressure phase has been determined as orthorhombic (space group: Imma) with a volume discontinuity of nearly 9% at the transition indicating the nature of trans…
New fine structures resolved at the ELNES Ti-L2,3 edge spectra of anatase and rutile: comparison between experiment and calculation.
2010
Abstract Anatase and rutile Ti- L 2,3 edge spectra were measured in electron energy loss spectroscopy (EELS) using a transmission electron microscope (TEM) coupled to a CEOS Cs-probe corrector, an omega-type monochromator and an in-column omega-type energy filter fully corrected for 2nd order aberrations. Thanks to the high energy resolution, high electron probe current and high stability achieved under this instrumental configuration, new fine structures, never reported before, were resolved at the L 3 band of both rutile and anatase. The data suggest that new peaks also exist in the L 2 e g band. The experimental spectra are compared with multichannel multiple scattering (MMS) calculation…