Bishara, Hanna ; Tsybenko, Hanna ; Supriya, Nandy ; Muhammad, Qaisar Khushi ; Frömling, Till ; Fang, Xufei ; Best, James P. ; Dehm, Gerhard (2022)
Dislocation-enhanced electrical conductivity in rutile TiO 2 accessed by room-temperature nanoindentation.
In: Scripta Materialia, 212
doi: 10.1016/j.scriptamat.2022.114543
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Dislocation-enhanced electrical conductivity is an emerging topic for ceramic oxides. In contrast to the majority of present studies which focus on large-scale crystal deformation or thin-film fabrication to introduce dislocations, we use a nanoindentation “pop-in stop” method to locally generate < 011 > edge-type dislocations at room temperature, without crack formation, on the (100) surface of a rutile TiO 2 single- crystal. Ion beam-assisted deposition of microcontacts allowed for both deformed and non-deformed zones to be locally probed by impedance spectroscopy. Compared to the dislocation-free region, a local enhancement of the electrical conductivity by 50% in the dislocation-rich regions is found. The study paves the way for local “mechanical-doping” of ceramics and oxide materials, allowing for the use of dislocations to tune the local conductivity with high spatial resolution.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2022 |
| Autor(en): | Bishara, Hanna ; Tsybenko, Hanna ; Supriya, Nandy ; Muhammad, Qaisar Khushi ; Frömling, Till ; Fang, Xufei ; Best, James P. ; Dehm, Gerhard |
| Art des Eintrags: | Bibliographie |
| Titel: | Dislocation-enhanced electrical conductivity in rutile TiO 2 accessed by room-temperature nanoindentation |
| Sprache: | Englisch |
| Publikationsjahr: | 24 Januar 2022 |
| Verlag: | Elsevier Science Publishing |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Scripta Materialia |
| Jahrgang/Volume einer Zeitschrift: | 212 |
| DOI: | 10.1016/j.scriptamat.2022.114543 |
| URL / URN: | https://doi.org/10.1016/j.scriptamat.2022.114543 |
| Kurzbeschreibung (Abstract): | Dislocation-enhanced electrical conductivity is an emerging topic for ceramic oxides. In contrast to the majority of present studies which focus on large-scale crystal deformation or thin-film fabrication to introduce dislocations, we use a nanoindentation “pop-in stop” method to locally generate < 011 > edge-type dislocations at room temperature, without crack formation, on the (100) surface of a rutile TiO 2 single- crystal. Ion beam-assisted deposition of microcontacts allowed for both deformed and non-deformed zones to be locally probed by impedance spectroscopy. Compared to the dislocation-free region, a local enhancement of the electrical conductivity by 50% in the dislocation-rich regions is found. The study paves the way for local “mechanical-doping” of ceramics and oxide materials, allowing for the use of dislocations to tune the local conductivity with high spatial resolution. |
| Freie Schlagworte: | Dislocations Titanium dioxide Mechanical doping Electrical conductivity Impedance spectroscopy |
| Zusätzliche Informationen: | Artikel ID: 114543 |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Nichtmetallisch-Anorganische Werkstoffe |
| Hinterlegungsdatum: | 24 Jan 2022 07:43 |
| Letzte Änderung: | 24 Jan 2022 07:43 |
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