Zobrazeno 1 - 10 of 58 pro vyhledávání: '"R.J. Prado"'
1
Structural characterization of alkali-silica reaction gel: An x-ray absorption fine structure study
Autor: Nicole P. Hasparyk, Francieli Tiecher, Denise Carpena Coitinho Dal Molin, R.J. Prado
Publikováno v: Cement and Concrete Research. 123:105774
This paper sets out to acquire information on the atomic structure of the alkali-silica reaction gel by using the x-ray absorption fine structure (XAFS) technique to improve the understanding of the mechanism of expansion. The gel generates mechanica
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3bb03457915f3096efa04901b6b43b77
https://doi.org/10.1016/j.cemconres.2019.05.019
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2
Crystal structure and local order of nanocrystalline zirconia-based solid solutions
Autor: Márcia Carvalho de Abreu Fantini, N E Walsoee de Reca, Diego Germán Lamas, L. M. Acuña, Aldo F. Craievich, I. O. Fábregas, R.J. Prado
Publikováno v: Powder Diffraction. 23:S46-S55
Crystal and local structures (long- and short-range order, respectively) of four nanocrystalline zirconia-based solid solutions—ZrO2-6 and 16 mol % CaO and ZrO2-2.8 and 12 mol % Y2O3—synthesized by a pH-controlled nitrate-glycine gel-combustion p
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f89a702fc5ea355b32c8476767d77822
https://doi.org/10.1154/1.2903503
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3
A Reconfigurable Aperture Antenna Based on Switched Links Between Electrically Small Metallic Patches
Autor: G.N. Kiesel, S.P. Blalock, E.J. Kuster, R.J. Prado, Glenn S. Smith, L.N. Pringle, J.M. Morris, P.G. Friederich, P.H. Harms
Publikováno v: IEEE Transactions on Antennas and Propagation. 52:1434-1445
A reconfigurable aperture (RECAP) antenna is described in which a planar array of electrically small, metallic patches are interconnected by switches. The antenna can be reconfigured to meet different performance goals by changing the switches that a
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::862a6c838de0933bcc6aef14e6cccfe4
https://doi.org/10.1109/tap.2004.825648
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4
Structural instability and electronic localization in the 2:1 salts: The case of the Fabre and the (DMtTTF)2CIO4salts
Autor: R.J. Prado, Pascale Foury-Leylekian, Jean-Marc Fabre, D. Le Bolloc'h, Jean-Paul Pouget, P. Lagarde, Sylvain Ravy
Publikováno v: Journal de Physique IV (Proceedings). 114:81-85
The charge ordering observed in the (TMTTF) 2 X family has been studied by X-ray absorption spectroscopy. XANES measurements at the Sulfur K-edge show no evidence of charge disproportionation larger than 0.5 e, and EXAFS at the Phosphorus K-edge indi
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::dc13df07d41eeeb67603524d7eb8a0f2
https://doi.org/10.1051/jp4:2004114015
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5
Annealing effects of highly homogeneous a-Si1−xCx:H
Autor: A. M. Flank, Inés Pereyra, R.J. Prado, T.F D’Addio, Márcia Carvalho de Abreu Fantini
Publikováno v: Journal of Non-Crystalline Solids. 330:196-215
We report the effect of annealing on the properties of amorphous hydrogenated silicon carbide thin films. The samples were deposited onto different substrates by plasma enhanced chemical vapor deposition at temperatures between 300 and 350 °C. The g
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6229f21c91f37e39b5a2ac2fa864ebed
https://doi.org/10.1016/s0022-3093(03)00526-x
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6
Structural and morphological investigation of amorphous hydrogenated silicon carbide
Autor: Inés Pereyra, G. Y. Odo, Márcia Carvalho de Abreu Fantini, R.J. Prado, C. M. Lepienski
Publikováno v: Journal of Applied Crystallography. 34:465-472
Amorphous hydrogenated silicon carbide thin films were deposited by plasma enhanced chemical vapor deposition (PECVD) at temperatures ranging from 573 to 623 K, with different concentrations of silane and methane, exploring two deposition parameters:
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::12e4002e57f20929f652ec3c92161139
https://doi.org/10.1107/s0021889801007889
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7
Improvements on the local order of amorphous hydrogenated silicon carbide films
Autor: C.A. Villacorta Cardoso, Manfredo Harri Tabacniks, Márcia Carvalho de Abreu Fantini, A. M. Flank, Inés Pereyra, R.J. Prado
Publikováno v: Journal of Non-Crystalline Solids. 283:1-10
This paper reports improvements on the chemical and structural order of amorphous hydrogenated silicon carbide thin films, deposited by plasma enhanced chemical vapor deposition (PEVCD) at the `starving plasma regime', from a gaseous mixture of silan
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8bbe3a7fb6755041c1f4e693c7f4c960
https://doi.org/10.1016/s0022-3093(01)00489-6
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9
Highly ordered amorphous silicon-carbon alloys obtained by RF PECVD
Autor: Márcia Carvalho de Abreu Fantini, Inés Pereyra, C. A. Villacorta, Marcelo Nelson Páez Carreño, R.J. Prado
Publikováno v: Brazilian Journal of Physics v.30 n.3 2000
Brazilian Journal of Physics
Sociedade Brasileira de Física (SBF)
instacron:SBF
ResearcherID
Brazilian Journal of Physics, Volume: 30, Issue: 3, Pages: 533-540, Published: 2000
Scopus-Elsevier
We have shown that close to stoichiometry RF PECVD amorphous silicon carbon alloys deposited under silane starving plasma conditions exhibit a tendency towards c-SiC chemical order. Motivated by this trend, we further explore the effect of increasing
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2dc404f71683694a9035e8875a9dabfc
https://doi.org/10.1590/s0103-97332000000300009
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10
Distribution of Pores in a-Si1−x C x :H Thin Films
Autor: Manfredo Harri Tabacniks, R.J. Prado, Inés Pereyra, D. R. S. Bittencourt, Márcia Carvalho de Abreu Fantini, Marcelo Nelson Páez Carreño
Publikováno v: Journal of Applied Crystallography. 30:659-663
The aim of this paper is to compare the optical, compositional and morphological properties of a-Si1 − x C x : H films deposited by plasma enhanced chemical vapour deposition (PECVD) using different mixtures of silane (SiH4) and methane (CH4) under
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c33a12dcf2654f695d8d18e4ddf9eb8d
https://doi.org/10.1107/s0021889897001349
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