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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Trautmann, Christina
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (35/35 displayed)
- 2024Conformal SiO₂ coating of sub-100 nm diameter channels of polycarbonate etched ion-track channels by atomic layer deposition
- 2024Nanoscale Structuring in Confined Geometries using Atomic Layer Deposition: Conformal Coating and Nanocavity Formation
- 2023Three-dimensional nanowire networks fabricated by ion track nanotechnology and their applicationscitations
- 2023Electrochemical Conversion of Cu Nanowire Arrays into Metal-Organic Frameworks HKUST-1citations
- 2023Three-dimensional free-standing gold nanowire networks as a platform for catalytic applicationscitations
- 2023Experimental evidence of a size-dependent sign change of the Seebeck coefficient of Bi nanowire arrayscitations
- 2023Fabrication, swift heavy ion irradiation, and damage analysis of lanthanide targetscitations
- 2022Biopolymer‐Templated Deposition of Ordered and Polymorph Titanium Dioxide Thin Films for Improved Surface‐Enhanced Raman Scattering Sensitivitycitations
- 2022Neutron Total Scattering and X-ray Diffraction Analysis of Radiation Effects in A3BO7 Weberite-type Complex Oxides
- 2022Far-From-Equilibrium Processing of Materials under Extreme Conditions
- 2021Shape of nanopores in track-etched polycarbonate membranescitations
- 2021Ion tracks in ultrathin polymer films: The role of the substratecitations
- 2021Conical Nanotubes Synthesized by Atomic Layer Deposition of Al2O3, TiO2, and SiO2 in Etched Ion-Track Nanochannelscitations
- 2020Cu2O/TiO2 Nanowire Assemblies as Photocathodes for Solar Hydrogen Evolution: Influence of Diameter, Length and NumberDensity of Wirescitations
- 2020Sputtering of LiF and other halide crystals in the electronic energy loss regimecitations
- 2020Effects of Grain Size on the Radiation Response of CeO2, ThO2, and UO2
- 2020Zinc ion driven ionic conduction through single asymmetric nanochannels functionalized with nanocompositescitations
- 2018ZnO Nanowire Networks as Photoanode Model Systems for Photoelectrochemical Applicationscitations
- 2018Synergistically-enhanced ion track formation in pre-damaged strontium titanate by energetic heavy ionscitations
- 2018Radiation-induced disorder in compressed lanthanide zirconates
- 2018Nanoscale Structuring in Confined Geometries using Atomic Layer Depositioncitations
- 2018Effects of Crystallite Size on the Response of CeO2, ThO2, and UO2 to Highly Ionizing Radiation
- 2017Fabrication of nanoporous graphene/polymer composite membranescitations
- 2016Electrodeposition and electroless plating of hierarchical metal superstructures composed of 1D nano- and microscale building blockscitations
- 2016Anisotropic expansion and amorphization of Ga$_2$O$_3$ irradiated with 946MeV Au ionscitations
- 2015Growth and morphological analysis of segmented AuAg alloy nanowires created by pulsed electrodeposition in ion-track etched membranescitations
- 2015Response of Gd2Ti2O7 and La2Ti2O7 to swift-heavy ion irradiation and annealingcitations
- 2014Swift heavy ion irradiation-induced amorphization of La2Ti2O7citations
- 2014Swift heavy ion irradiation-induced amorphization of $La_2Ti_2O_7$citations
- 2014Polycarbonate activation for electroless plating by dimethylaminoborane absorption and subsequent nanoparticle depositioncitations
- 2012Swift heavy ion-induced amorphization of $CaZrO_{3}$ perovskitecitations
- 2010Generation of colour centres in yttria-stabilized zirconia by heavy ion irradiations in the GeV rangecitations
- 2008X-RAY DIFFRACTION STUDY OF THE DAMAGE INDUCED IN YTTRIA-STABILIZED ZIRCONIA BY SWIFT HEAVY ION IRRADIATIONS
- 2004Colour centre production in yttria-stabilized zirconia by swift charged particle irradiationscitations
- 2004Colour center production in yttria-stabilizing zirconia by swift charge particle irradiations.citations
Places of action
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article
Response of Gd2Ti2O7 and La2Ti2O7 to swift-heavy ion irradiation and annealing
Abstract
<p>Swift heavy ion (2 GeV <sup>181</sup>Ta) irradiation-induced amorphization and temperature-induced recrystallization of cubic pyrochlore Gd<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub> (Fd3¯m) are compared with the response of a compositionally-similar material with a monoclinic-layered perovskite-type structure, La<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub> (P2<sub>1</sub>). The averaged electronic energy loss, dE/dx, was 37 keV/nm and 35 keV/nm in Gd<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub> and La<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub>, respectively. Systematic analysis of the structural modifications was completed using transmission electron microscopy, synchrotron X-ray diffraction, Raman spectroscopy, and small-angle X-ray scattering. Increasing ion-induced amorphization with increasing ion fluence was evident in the X-ray diffraction patterns of both compositions by a reduction in the intensity of the diffraction maxima concurrent with the growth in intensity of a broad diffuse scattering halo. Transmission electron microscopy analysis showed complete amorphization within ion tracks (diameter: ∼10 nm) for the perovskite-type material; whereas a concentric, core-shell morphology was evident in the ion tracks of the pyrochlore, with an outer shell of disordered yet still crystalline material with the fluorite structure surrounding an amorphous track core (diameter: ∼9 nm). The radiation response of both titanate oxides with the same stoichiometry can be understood in terms of differences in their structures and compositions. While the radiation damage susceptibility of pyrochlore A<sub>2</sub>B<sub>2</sub>O<sub>7</sub> materials decreases as a function of the cation radius ratio r<sub>A</sub>/r<sub>B</sub>, the current study correlates this behavior with the stability field of monoclinic structures, where r<sub>La</sub>/r<sub>Ti</sub> > r<sub>Gd</sub>/r<sub>Ti</sub>. Isochronal annealing experiments of the irradiated materials showed complete recrystallization of La<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub> at 775 °C and of Gd<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub> at 850 °C. The annealing behavior is discussed in terms of enhanced damage recovery in La<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub>, compared to the pyrochlore compounds Gd<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub>. The difference in the recrystallization behavior may be related to structural constraints, i.e., reconstructing a low symmetry versus a high symmetry phase.</p>