Dresden 2017 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
HL: Fachverband Halbleiterphysik
HL 79: Poster: New Materials
HL 79.25: Poster
Donnerstag, 23. März 2017, 15:00–19:00, P2-OG3
Temperature-dependent Seebeck coefficient of silver nanowires — •Maximilian Kockert1, Danny Kojda1, Rüdiger Mitdank1, Johannes Ruhhammer2, Zhi Wang2, Michael Kröner2, Peter Woias2, Toni Markurt3, and Saskia F. Fischer1 — 1Group Novel Materials, Humboldt-Universität zu Berlin, D-12489 Berlin — 2Laboratory for Design of Microsystems, University of Freiburg - IMTEK, D-79110 Freiburg — 3Leibniz-Institute for Crystal Growth, D-12489 Berlin
Bulk silver has the highest electrical and thermal conductivity of all metals. The process of miniaturization and nanopatterning affects these two parameters. The electrical and thermal conductivity of individual silver nanowires were recently investigated in [1] and [2].
In this work, we present the temperature-dependent Seebeck coefficient of individual silver nanowires relative to platinum between temperatures of 10 K and 300 K. The silver nanowires were prepared by the reduction of high purity silver nitrate (99.9999 %). Four individual silver nanowires showed reproducable results. Above 160 K, the diffusive part of the Seebeck coefficent of silver nanowires relative to nanostructured platinum conducting lines SAg,PtNW is in agreement with the Seebeck coefficent of bulk silver relative to bulk platinum SAg,PtBulk. A change of sign of the Seebeck coefficent takes place at 160 K. Below 160 K, the Seebeck coefficent is dominated by the phonon drag effect.In this regime SAg,PtNW differs from SAg,PtBulk.
[1] D. Kojda et al., Physical Review B 91, 024302-1 (2015).
[2] D. Kojda et al., Physica Status Solidi A 213, 557 (2015).