DPG Phi
Verhandlungen
Verhandlungen
DPG

Regensburg 2016 – scientific programme

Parts | Days | Selection | Search | Updates | Downloads | Help

O: Fachverband Oberflächenphysik

O 40: Heterogeneous Catalysis: Experiment

O 40.8: Talk

Tuesday, March 8, 2016, 15:45–16:00, S053

In-situ temperature measurement using chemoelectronic nanodiodes — •Jan Philipp Meyburg, Detlef Diesing, and Eckart Hasselbrink — Fakultät für Chemie, Universität Duisburg-Essen, Essen, Germany

Chemoelectronic nanodiodes based on metal–insulator–metal thin film structures allow the detection of hot charge carriers that are excited in the course of surface reactions. In this context, the Pt-catalyzed oxidation of carbon monoxide is studied on a Pt–Ta2O5–Ta nanodiode. In order to activate this surface reaction locally the nanodiode is heated while the sample holder is held at a constant temperature below 80 K. Thus, a temperature gradient results and an accurate in-situ temperature measurement is required. During a continuous variation of the potential between the Pt electrode and the Ta electrode a device current is recorded that exhibits a temperature dependence. Consequently, this current can be used in order to monitor the device temperature. Therewith, exclusively the temperature of the nanoscopic MIM volume is measurable during the reaction process.

100% | Mobile Layout | Deutsche Version | Contact/Imprint/Privacy
DPG-Physik > DPG-Verhandlungen > 2016 > Regensburg