Regensburg 2013 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

O: Fachverband Oberflächenphysik

O 58: Poster Session III (Solid-liquid interfaces; Scanning probe and other methods; Electronic structure theory; Spin-orbit interaction)

O 58.57: Poster

Mittwoch, 13. März 2013, 18:15–21:45, Poster B1

Enhanced heat transfer by nanoscale NaCl-Islands on Au(111) observed by Near-field Scanning Thermal Microscopy (NSThM) — •Ludwig Worbes, David Hellmann, Konstantin Kloppstech, Nils Könne, and Achim Kittel — EHF, Faculty V, Department of Physics, C. v. O. University of Oldenburg, 26129 Oldenburg, Germany

Due to the advance in nanoscience heat transport at small length scales is receiving more attention as a field of fundamental research as well as one influencing future technologies. The Near-field Scanning Thermal Microscope (NSThM) is a tool to investigate heat transport on the nanoscale[1]. It is based on a UHV-STM, featuring a tunneling probe with an integrated miniaturized thermocouple temperature sensor. Therefore, we can measure the temperature change of the tip due to heat flux between a heated or cooled sample and the probe in the range of distances between (tunnel-) contact and a few nanometers with high spatial resolution.

In this poster we present measurements of the heat-flow above one monolayer thick islands of NaCl prepared by physical vapor deposition on top of Au(111). We observe a distinct enhancement due to the NaCl-layer. For future applications such measurements are important for designing the heat flow management of nanoscaled devices. Such measurements may also trigger new theoretical approaches, because they show a distinct effect at length scales below the ones described by the established macroscopic theories.

[1] Uli F. Wischnath et al., Rev. Sci. Instrum. 79, 073708 (2008)