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P: Fachverband Plasmaphysik

P 20: Poster Session- Low Temperature Plasmas

P 20.15: Poster

Mittwoch, 2. März 2016, 16:30–19:00, Empore Lichthof

Simulation of sputter-deposited gold cluster growth on a thin polymer film^* — •Jan Willem Abraham¹, Thomas Strunskus², Franz Faupel², and Michael Bonitz¹ — ¹Institut für Theoretische Physik und Astrophysik, CAU Kiel — ²Institut für Materialwissenschaft, CAU Kiel

The fabrication of metal-polymer nanocomposites with tailored optoelectronic properties has been a challenge since the early days of nanotechnology. In recent experiments [1], the morphology and optical properties of sputtered gold on a thin polystyrene film were monitored in real time. In this work, we provide additional computational analysis of such a system, presenting a method using Langevin molecular dynamics [2] to simulate the processes on the polymer surface that lead to the formation of gold clusters. The simulation scheme takes into account the deposition of single gold atoms, diffusion of the particles on the surface, desorption of atoms as well the creation of surface defects caused by ion impingement. Comparing heights, radii, distances, and densities of the clusters with experimentally measured data, we observe good quantitative agreement and we explain the influence of several parameters on the cluster morphology.

[1] M. Schwartzkopf et al., ACS Appl. Mater. Interfaces 7, 13547 (2015).

[2] J. W. Abraham, and M. Bonitz, submitted for publication (2015).

^*This work is supported by the Deutsche Forschungsgemeinschaft via SFB-TR 24 (project A5).