2nd internal biennial science meeting of the MLZ

Investigation of the surface of binary metallic alloys using Positron annihilation induced Auger Electron Spectroscopy, XPS and STM

16 Jun 2015, 11:20

20m

Ground floor II (Seminarhaus Grainau)

Short talk Material Science Material Science

Speaker

Samantha Zimnik

Description

The characterization of the elemental composition of surfaces is of high importance for the understanding of many surface-related processes such as catalysis or oxidation. Positron annihilation induced Auger Electron Spectroscopy (PAES) is a powerful technique to gather information about the elemental omposition of only the topmost atomic layer of a specimen. The positron beam facility NEPOMUC delivers a high intensity positron beam of 10^9 e+/s and enables measurement times of only a few minutes per PAES spectrum. Thus, time-dependent PAES is possible and enables the in-situ observation of surface kinetics. The upgraded surface spectrometer at NEPOMUC uses the complementary techniques PAES, XPS and STM for a comprehensive surface analysis. Financial support by the BMBF (project no. 05K13WO1) is gratefully acknowledged.