Forging Fast Ion Conducting Nanochannels with Swift Heavy Ions: The Correlated Role of Local Electronic and Atomic Structure
| Autor: | Yanwen Zhang, Maik Lang, Christina Trautmann, Xin Ou, Valentino R. Cooper, Bin Liu, William J. Weber, Matthew F. Chisholm, Brian K. Voas, Ritesh Sachan, Dilpuneet S. Aidhy |
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| Rok vydání: | 2017 |
| Předmět: |
Chemistry
Pyrochlore chemistry.chemical_element 02 engineering and technology Electronic structure engineering.material 021001 nanoscience & nanotechnology Thermal conduction Thermal diffusivity 01 natural sciences Oxygen Titanate Surfaces Coatings and Films Electronic Optical and Magnetic Materials Ion General Energy Chemical physics 0103 physical sciences engineering Ionic conductivity Physical and Theoretical Chemistry Atomic physics 010306 general physics 0210 nano-technology |
| Zdroj: | The Journal of Physical Chemistry C. 121:975-981 |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/acs.jpcc.6b12522 |
| Popis: | Atomically disordered oxides have attracted significant attention in recent years due to the possibility of enhanced ionic conductivity. However, the correlation between atomic disorder, corresponding electronic structure, and the resulting oxygen diffusivity is not well understood. The disordered variants of the ordered pyrochlore structure in gadolinium titanate (Gd2Ti2O7) are seen as a particularly interesting prospect due to intrinsic presence of a vacant oxygen site in the unit atomic structure, which could provide a channel for fast oxygen conduction. In the present work, we provide insights into the subangstrom scale on the disordering-induced variations in the local atomic environment and its effect on the electronic structure in high-energy ion irradiation-induced disordered nanochannels, which can be utilized as pathways for fast oxygen ion transport. With the help of an atomic plane-by-plane-resolved analyses, the work shows how the presence of various types of TiOx polyhedral that exist in the... |
| Databáze: | OpenAIRE |
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