Ileana Florea
Université Paris-Saclay
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Publication
Featured researches published by Ileana Florea.
Scientific Reports | 2016
Loïc Loisel; Ileana Florea; Costel-Sorin Cojocaru; Beng Kang Tay; Bérengère Lebental
Nano and femtosecond laser writing are becoming very popular techniques for patterning carbon-based materials, as they are single-step processes enabling the drawing of complex shapes without photoresist. However, pulsed laser writing requires costly laser sources and is known to cause damages to the surrounding material. By comparison, continuous-wave lasers are cheap, stable and provide energy at a more moderate rate. Here, we show that a continuous-wave laser may be used to pattern vertical nano-crystalline graphite thin films with very few macroscale defects. Moreover, a spatially resolved study of the impact of the annealing to the crystalline structure and to the oxygen ingress in the film is provided: amorphization, matter removal and high oxygen content at the center of the beam; sp2 clustering and low oxygen content at its periphery. These data strongly suggest that amorphization and matter removal are controlled by carbon oxidation. The simultaneous occurrence of oxidation and amorphization results in a unique evolution of the Raman spectra as a function of annealing time, with a decrease of the I(D)/I(G) values but an upshift of the G peak frequency.
Angewandte Chemie | 2018
Lucy Gloag; Tania M. Benedetti; Soshan Cheong; Yibing Li; Xuan Hao Chan; Lise Marie Lacroix; Shery L. Y. Chang; Raul Arenal; Ileana Florea; Hector Barron; Amanda S. Barnard; Anna M. Henning; Chuan Zhao; Wolfgang Schuhmann; J. Justin Gooding; Richard D. Tilley
Achieving stability with highly active Ru nanoparticles for electrocatalysis is a major challenge for the oxygen evolution reaction. As improved stability of Ru catalysts has been shown for bulk surfaces with low-index facets, there is an opportunity to incorporate these stable facets into Ru nanoparticles. Now, a new solution synthesis is presented in which hexagonal close-packed structured Ru is grown on Au to form nanoparticles with 3D branches. Exposing low-index facets on these 3D branches creates stable reaction kinetics to achieve high activity and the highest stability observed for Ru nanoparticle oxygen evolution reaction catalysts. These design principles provide a synthetic strategy to achieve stable and active electrocatalysts.
Journal of Physics D | 2016
Junkang Wang; Pavel V. Bulkin; Ileana Florea; Jean-Luc Maurice; E. Johnson
Nanoscale | 2017
J. Tang; Jean-Luc Maurice; F. Fossard; Ileana Florea; Wanghua Chen; Erik V. Johnson; Martin Foldyna; L. Yu; P. Roca i Cabarrocas
Thin Solid Films | 2018
Leandro Sacco; Ileana Florea; Marc Châtelet; Costel-Sorin Cojocaru
Progress in Photovoltaics | 2018
Zuzana Mrazkova; Igor P. Sobkowicz; Martin Foldyna; Kamil Postava; Ileana Florea; Jaromír Pištora; Pere Roca i Cabarrocas
Physical Review Letters | 2018
J. C. Harmand; G. Patriarche; Frank Glas; Federico Panciera; Ileana Florea; Jean-Luc Maurice; L. Travers; Yannick Ollivier
Journal of Physics: Materials | 2018
Leandro Sacco; Ileana Florea; M. Châtelet; Costel-Sorin Cojocaru
arXiv: Materials Science | 2016
Zheng Fan; Jean-Luc Maurice; Ileana Florea; S. Guilet; E. Cambril; X. Lafosse; Laurent Couraud; Kamel Merghem; S. Bouchoule; Linwei Yu; Pere Roura Grabulosa; Pere Roca i Cabarrocas
Physica Status Solidi (c) | 2016
Junkang Wang; Ileana Florea; Pavel V. Bulkin; Jean-Luc Maurice; Erik V. Johnson