L
L. León Félix
Researcher at University of Brasília
Publications - 19
Citations - 922
L. León Félix is an academic researcher from University of Brasília. The author has contributed to research in topics: Nanoparticle & Superparamagnetism. The author has an hindex of 8, co-authored 16 publications receiving 770 citations. Previous affiliations of L. León Félix include University of Zaragoza & National University of San Marcos.
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Journal ArticleDOI
The structure of graphite oxide: Investigation of its surface chemical groups
TL;DR: A new model for GO is proposed based on the results; -O-, -OH, and -C=O groups are on the surface and the existence of ketone groups is implied by FT-IR, which is verified by O K-edge XANES and (13)C solid-state NMR.
Journal ArticleDOI
The structure of graphite oxide: investigation of its surface chemical groups.
TL;DR: In this paper, the structure of graphite oxide (GO) has been systematically studied using various tools such as SEM, TEM, XRD, Fourier transform infrared spectroscopy (FT-IR), X-ray photoemission spectro-phycopy (XPS), 13C solid-state NMR, and O K-edge Xray absorption near edge structure (XANES).
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Gold-decorated magnetic nanoparticles design for hyperthermia applications and as a potential platform for their surface-functionalization.
L. León Félix,L. León Félix,Beatriz Sanz,Victor Sebastian,Teobaldo E. Torres,Marcelo Henrique Sousa,Jose A. H. Coaquira,M. R. Ibarra,Gerardo F. Goya +8 more
TL;DR: In vitro heating experiments on microglial BV2 cells under an ac magnetic field yielded similar intracellular SPA values imply that functionalization of the magnetic particles with Au did not change the heating efficiency, providing a more flexible platform for multifunctional functionalization.
Journal ArticleDOI
Structural and magnetic properties of core-shell Au/Fe 3 O 4 nanoparticles.
L. León Félix,L. León Félix,Jose A. H. Coaquira,M. A. R. Martínez,Gerardo F. Goya,J. Mantilla,Marcelo Henrique Sousa,L. De Los Santos Valladares,Crispin H. W. Barnes,Paulo C. Morais,Paulo C. Morais +10 more
TL;DR: An exchange bias effect was observed when cooling down the samples below room temperature under an external magnetic field and the exchange bias field (HEX) started to appear at T~40 K and its value increased by decreasing the temperature.
Journal ArticleDOI
Structural and Magnetic Properties of Monophasic Maghemite (γ-Fe2O3) Nanocrystalline Powder
Juan Adrián Ramos Guivar,Arturo Isaías Martínez,Ana María Osorio Anaya,Luis De Los Santos Valladares,L. León Félix,Angel Domínguez +5 more
TL;DR: In this article, structural and magnetic studies of monophasic magnetite (γ-Fe2O3) synthesized by the co-precipitation chemical route are reported.