Dresden 2017 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 33: Nanostructures at Surfaces: Metals, Oxides and Semiconductors I
O 33.8: Vortrag
Dienstag, 21. März 2017, 12:15–12:30, REC/PHY C213
Simulation of metal cluster growth on a thin polymer film during sputter deposition — •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. Under typical conditions in plasma-based physical vapor deposition experiments, crucial properties such as composition, size and shape of the nanoparticles evolve in a self-organized process and are hence difficult to obtain in a controlled way. Computer simulations can be helpful to improve the understanding of the relevant processes, but the required length and time scales impose big challenges on all currently available methods. In this work, we present an approach based on Langevin dynamics that allows us to investigate the growth of Au and bi-metallic Ag-Cu clusters on polymer surfaces on experimentally relevant time scales [1]. We show that our results are in good agreement with recent GISAXS experiments that were carried out to study the morphology and optical properties of sputtered gold on a thin polystyrene film in real time [2]. Finally, we demonstrate some approaches to calculate the intensity of scattered X-rays as well as the UV-Vis absorption spectrum for our simulated structures. [1] J. W. Abraham et al., J. Appl. Phys. 119, 185301 (2016). [2] M. Schwartzkopf et al., ACS Appl. Mater. Interfaces 7, 13547 (2015).