Dresden 2014 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 37: Posters: Plasmonics, Electronic Structure and Spin-Orbit Interaction, Semiconductor and Insulator Surfaces, Nanostructures

O 37.90: Poster

Dienstag, 1. April 2014, 18:30–22:00, P2

Characterization of mass selected silver clusters produced in a supersonic nozzle expansion — •Jens-Christian Meyer, David Engemann, and Heinz Hövel — Fakultät Physik / DELTA, Technische Universität Dortmund, 44227 Dortmund

The structures and properties of clusters are located in between molecules and solids and their properties are strongly dependent on their size.

Silver-cluster with a diameter distribution of 2R= 2± 0.6 nm are produced in a cluster apparatus with a supersonic nozzle expansion source [1] and deposited into various matrices. These clusters are characterized by UV/VIS-spectroscopy, transelectron-microscopy (TEM) and small angle x-ray scattering technique (SAXS) to determine their structure.

To investigate in detail how the properties of silver-clusters are related to their size, a mass selector will be implemented to our cluster source. With an electric field, ionized clusters will be deflected dependent on their size.

[1] H. Hövel; S. Fritz; A. Hilger; U. Kreibig; M. Vollmer, Width of cluster plasmon resonances: Bulk dielectric functions and chemical interface damping. Phys.Rev.B, 48, 18178, 1993.