M
Maria do Carmo Martins Alves
Researcher at Universidade Federal do Rio Grande do Sul
Publications - 86
Citations - 2743
Maria do Carmo Martins Alves is an academic researcher from Universidade Federal do Rio Grande do Sul. The author has contributed to research in topics: X-ray absorption spectroscopy & Absorption spectroscopy. The author has an hindex of 25, co-authored 85 publications receiving 2503 citations. Previous affiliations of Maria do Carmo Martins Alves include National Council for Scientific and Technological Development.
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Structural, electronic, and magnetic properties of tetragonal Mn3-xGa: Experiments and first-principles calculations
Jürgen Winterlik,Benjamin Balke,Gerhard H. Fecher,Claudia Felser,Maria do Carmo Martins Alves,Fabiano Bernardi,Jonder Morais +6 more
TL;DR: In this article, the electronic, magnetic, and structural properties of binary intermetallic compounds were investigated and it was found that all these materials are hard magnetic, with energy products ranging from $10.1\phantom{\rule{0.3em}{0ex}}\mathrm{m}}^{\ensuremath{-}3}$ for high Mn content to $61.1$ for low Mn content.
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Nanosized powders of NiZn ferrite: Synthesis, structure, and magnetism
Adriana Silva de Albuquerque,José D. Ardisson,Waldemar A. A. Macedo,Maria do Carmo Martins Alves +3 more
TL;DR: In this paper, the structure and magnetic behavior of nanostructured powders of stoichiometric NiZn ferrite, Ni0.5Zn 0.5Fe2O4, synthesized by coprecipitation, are investigated by extended x-ray-absorption fine structure spectroscopy (EXAFS), xray diffraction, and vibrating sample magnetometry.
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Mechanism of anion retention from EXAFS and density functional calculations: Arsenic (V) adsorbed on gibbsite
Ana Cláudia Queiroz Ladeira,Virginia S. T. Ciminelli,Hélio A. Duarte,Maria do Carmo Martins Alves,Aline Y. Ramos +4 more
TL;DR: X-ray absorption fine structure spectroscopy and density functional calculations were used to determine the structural model of arsenic surface complex on gibbsite mineral in this paper, which showed that As(V) forms an inner sphere bidentate binuclear complex on the surface of Al oxyhydroxyl octaedra.
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Synthesis and characterization of catalytic iridium nanoparticles in imidazolium ionic liquids
Gledison Fonseca,Giovanna Machado,Sérgio R. Teixeira,Gerhard H. Fecher,Jonder Morais,Maria do Carmo Martins Alves,Jairton Dupont +6 more
TL;DR: XPS and EXAFS analyses clearly show the interactions of the ionic liquid with the metal surface demonstrating the formation of an ionic Liquid protective layer surrounding the iridium nanoparticles.
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Synthesis and characterization of nickel nanoparticles dispersed in imidazolium ionic liquids
Pedro Migowski,Giovanna Machado,Sérgio Ribeiro Texeira,Maria do Carmo Martins Alves,Jonder Morais,Agnès Traverse,Jairton Dupont +6 more
TL;DR: The diameter and size-distribution of Ni nanoparticles prepared by the decomposition of [bis(1,5-cyclooctadiene)nickel(0)] organometallic precursor dissolved in 1-alkyl-3-methylimidazolium N-bis(trifluoromethanesulfonyl) amide ionic liquids depend on the length of the alkyl side-chain of the imidazolate ring.