Wang, Jianli ; Yu, Hongmei ; Walbert, Torsten ; Antoni, Markus ; Wang, Cong ; Xi, Wei ; Muench, Falk ; Yang, Juekuan ; Chen, Yunfei ; Ensinger, Wolfgang (2019)
Electrical and thermal conductivities of polycrystalline platinum nanowires.
In: Nanotechnology, 30 (45)
doi: 10.1088/1361-6528/ab37a7
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Understanding the electrical and thermal transport properties of polycrystalline metallic nanostructures is of great interest for applications in microelectronics. In view of the diverse experimental results in polycrystalline metallic nanowires and nanofilms, it is a long-standing question whether their electrical and thermal properties can be well predicted by a practical model. By eliminating the effects of electrical and thermal contact resistances, we measure the electrical and thermal conductivities of three different polycrystalline Pt nanowires. The electron scattering at the surface is found to be diffusive, and the charge reflection coefficient at grain boundaries is proved to be a function of the melting point. The Lorenz number is observed to be suppressed from the free-electron value by about 30%, which can be explained by introducing a thermal reflection coefficient in calculating the thermal conductivity to account for the small angle scattering effect involving phonons at the grain boundaries. Using this model, both the electrical and thermal conductivities of the polycrystalline Pt nanowires are calculated at different diameters and temperatures.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2019 |
| Autor(en): | Wang, Jianli ; Yu, Hongmei ; Walbert, Torsten ; Antoni, Markus ; Wang, Cong ; Xi, Wei ; Muench, Falk ; Yang, Juekuan ; Chen, Yunfei ; Ensinger, Wolfgang |
| Art des Eintrags: | Bibliographie |
| Titel: | Electrical and thermal conductivities of polycrystalline platinum nanowires |
| Sprache: | Englisch |
| Publikationsjahr: | 27 August 2019 |
| Verlag: | Institute of Physics Publishing (IOP) |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Nanotechnology |
| Jahrgang/Volume einer Zeitschrift: | 30 |
| (Heft-)Nummer: | 45 |
| DOI: | 10.1088/1361-6528/ab37a7 |
| URL / URN: | https://doi.org/10.1088/1361-6528/ab37a7 |
| Kurzbeschreibung (Abstract): | Understanding the electrical and thermal transport properties of polycrystalline metallic nanostructures is of great interest for applications in microelectronics. In view of the diverse experimental results in polycrystalline metallic nanowires and nanofilms, it is a long-standing question whether their electrical and thermal properties can be well predicted by a practical model. By eliminating the effects of electrical and thermal contact resistances, we measure the electrical and thermal conductivities of three different polycrystalline Pt nanowires. The electron scattering at the surface is found to be diffusive, and the charge reflection coefficient at grain boundaries is proved to be a function of the melting point. The Lorenz number is observed to be suppressed from the free-electron value by about 30%, which can be explained by introducing a thermal reflection coefficient in calculating the thermal conductivity to account for the small angle scattering effect involving phonons at the grain boundaries. Using this model, both the electrical and thermal conductivities of the polycrystalline Pt nanowires are calculated at different diameters and temperatures. |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Materialanalytik |
| Hinterlegungsdatum: | 14 Feb 2020 10:10 |
| Letzte Änderung: | 14 Feb 2020 10:10 |
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