| People | Locations | Statistics |
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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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Milčius, Darius
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (29/29 displayed)
- 2022On the structure of SbTeIcitations
- 2020Superhydrophilic functionalized graphene/fiberglass/epoxy laminates with high mechanical, impact and thermal performance and treated by plasmacitations
- 2019Black carbon-doped TiO2 films : synthesis, characterization and photocatalysiscitations
- 2018A new method of nanocrystalline nickel powder formation by magnetron sputtering on the water-soluble substratescitations
- 2017Hydrogen generation based on aluminum-water reaction for fuel cell applicationscitations
- 2017Stannate increases hydrogen evolution overpotential on rechargeable alkaline iron electrodescitations
- 2017Generation of hydrogen by the reaction between plasma modified aluminium and watercitations
- 2014Reaction of aluminum with water to produce hydrogen
- 2013The investigation of e-beam deposited titanium dioxide and calcium titanate thin filmscitations
- 2012Synthesis and characterization of multilayered GDC and SDC thin films deposited by e-beam technique
- 2012Substrate effects on formation and hydrogenation of Mg-Ni filmscitations
- 2011Scandium stabilized zirconium thin films formation by e-beam techniquecitations
- 2011The properties of scandium and cerium stabilized zirconium thin films formed by e-beam techniquecitations
- 2011Synthesis and characterization of GDC solid electrolytes obtained by solid state sintering of multilayer thin filmscitations
- 2011Influence of initial powder particle size on yttrium stabilized zirconium thin films formed by e-beam techniquecitations
- 2010A mechanically switchable metal-insulator transition in Mg2NiH4 discovers a strain sensitive, nanoscale modulated resistivity connected to a stacking faultcitations
- 2010The properties of gadolinium doped cerium oxide thin films formed evaporating nanopowder ceramic
- 2010Synthesis of gadolinium doped ceria solid electrolyte by solid state reactions of CeO2/Gd2O3 multilayer thin films
- 2009Porosity evaluation of TiO2 thin films deposited using pulsed DC-magnetron sputtering
- 2009The effects of dynamic structural transformations on hydrogenation properties of Mg and MgNi thin filmscitations
- 2009Titanium oxide thin films synthesis by pulsed – DC magnetron sputteringcitations
- 2009The properties of samarium doped ceria oxide thin films grown by e-beam deposition techniquecitations
- 2008Hydrogen storage in Mg-based nanocrystalline metal hydrides
- 2008Reactive pulsed - dc magnetron sputtering of Cr2O3 thin films
- 2007Failure analysis by indentation test of electrodeposited nanocrystalline CO-W and FE-W thin films
- 2007Influence of ion irradiation effects on the hydriding behavior of nanocrystalline Mg–Ni filmscitations
- 2007Formation of gadolinium doped ceria oxide thin films by electron beam deposition
- 2005Hydrogen storage in the bubbles formed by high-flux ion implantation in thin Al filmscitations
- 2005Synthesis of Mg(AlH4)(2) in bilayer Mg/Al thin films under plasma immersion hydrogen ion implantation and thermal desorption processescitations
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article
A mechanically switchable metal-insulator transition in Mg2NiH4 discovers a strain sensitive, nanoscale modulated resistivity connected to a stacking fault
Abstract
The band gap in semiconducting Mg2NiH4 was found to be dependent on subtle structural differences. This was discovered when investigating if thin film samples of Mg2NiH4 could be used in a switchable mirror or window device by utilizing a high to low temperature transition at about 510 K. In powder samples; this transition between an FCC high temperature phase, with dynamically disordered NiH4-complexes, and a monoclinic distorted low temperature phase, with ordered Mg2NiH4-complexes, has been demonstrated in a mechanical reversible conductor–insulator transition (Blomqvist and Noréus (2002) [7]). Black monoclinic Mg2NiH4 powders were found to have a band gap of 1.1 eV. Pressed tablets of black monoclinic Mg2NiH4 powders are conductive, probably from doping by impurities or non-stoichiometry. Thin film Mg2NiH4 samples were produced by reacting hydrogen with magnetron sputtered Mg2Ni films on quartz glass or CaF2 substrates. The Mg2NiH4 films on the other hand were orange, transparent with a band gap of 2.2 eV and a cubic unit cell parameter almost identical to the disorder HT phase but with lower symmetry. If black Mg2NiH4 powder is heated above the phase transition at 510 K and subsequently cooled down, the conductivity is lost and the powder turns brown. After this heat treatment TEM pictures revealed a multiple stacking fault having a local pseudo-cubic arrangement separating regions of monoclinic symmetry. The loss of conductivity and colour change is attributed to a higher band gap in the strained areas. The structure on each side of the stacking fault is related by a mirror plane as a consequence of the possibility for the NiH4-complexes to order with different orientations. This leads to a mismatch in the long range ordering and strain is probably creating the stacking faults. Strain is important for forming the cubic modification.