Berlin 2018 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 45: Poster: Solid-Liquid Interfaces - Structure, Spectroscopy, Reactions and Electrochemistry

O 45.7: Poster

Dienstag, 13. März 2018, 18:15–20:30, Poster A

Chemical analysis of solid-liquid interfaces by in-situ Rutherford Backscattering Spectrometry — •Nasrin B. khojasteh and René Heller — HZDR, Dresden, Germany

Solid-liquid interfaces are important locations for various reactions to occur in biological, chemical and physical processes [1-3]. Recently, an experimental setup for in-situ Rutherford Backscattering Spectrometry (RBS) technique has been installed at the 2 MV Van-de-Graaff accelerator at Ion Beam Center (IBC) of the Helmholtz-Zentrum Dresden-Rossendorf to analyze solid-liquid interfaces as well as to conduct electro-chemistry experiments. The focus of the project is to perform experiments in different fields utilizing this quantitative, non-destructive and standard free ion beam analysis technique for solid-liquid interfaces. A Si3N4 window separates the liquid in the cell from vacuum in the beam line. He+ beam with E = 1.7 MeV is employed to bombard the samples. For feasibility tests, the cell was filled with air, Ne, He, Xe and DIH2O respectively and RBS and Particle Induced X-Ray Emission Spectroscopy (PIXE) spectra were recorded. To examine the efficiency of the technique, ion backscattering studies of the solid-liquid using 0.1M solutions of Cu(NO3) and AgNO3 have been performed and are compared to the literature [4].

[1] Kötz et al., Electrochimica acta. 31 (1986) 169. [2] Morita et al., Radiation Physics and Chemistry. 49 (1997) 603. [3] Hodnik et al., Accounts of chemical research. 49 (2016) 2015. [4] Forster et al., Nuclear Instruments and Methods in Physics Research Section B. 28 (1987) 385.