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Time-resolved X-ray investigations of metal layer growth on functional thin films Stephan V. Roth1, Matthias Schwartzkopf1, Shun Yu2, Gonzalo Santoro1, Ralph Döhrmann1, Sarathlal Koyiloth Vayalil1, Johannes Risch1, Jannik Wöhnert1, Peng Zhang1, Peter MüllerBuschbaum3, Wilfried Wurth4 1) Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany; 2) KTH Royal Institute of Technology, School of Chemical Science and Engineering, Polymeric Materials & Wallenberg Wood Science Center (WWSC), Teknikringen 56-58, SE-100 44 Stockholm, Sweden; 3) TU München, Physik-Department, Lehrstuhl für Funktionelle Materialien, James-Franck-Str. 1, 85748 Garching, Germany; 4) Department Physik, Institut für Experimentalphysik, Universität Hamburg, Luruper Chaussee 149, D-22761 Hamburg, Germany Targeted installation of nanostructured metal films for application devices is of utmost importance in many areas of modern science and technology, including organic photovoltaics (OPV), sensors, and plasmonics. Such devices consist of several organic, inorganic and metallic layers being installed using fluidic coating and vacuum deposition methods. Among vacuum deposition, sputter deposition as a flexible and high-throughput technique is widely used to install sensors, e.g. surface-enhanced Raman Scattering (SERS)) [1] as well as contact layer materials in organic electronics [2] and OPV [3]. In order to understand the metal layer growth at the interface with polymers, real-time observations of metal layer fabrication are indispensable. Here, we follow several routes. Based on an application-related model system, we follow the growth of gold (Au) on a dielectric surface [4]. We have established a generic geometric growth model, which is corroborated by kinetic monte-carlo simulations [5]. We extend this to the case of small-molecule devices, which can be used in information technology. A detailed analysis of the growth kinetics reveals a multi-stage growth going hand in hand with the establishment of a doping layer inside the soft smallmolecule layer [2]. The nanostructural growth is correlated with the optical properties, thereby establishing a detailed nanostructure-function relationship. Fig. Growth model for Aluminium Alq3 [2]. on [1] Singh et al., Nanoscale 4, 3410 (2012); [2] Yu et al., J. Phys. Chem. Lett. 4, 3170 (2013) [3] Kaune et al., ACS Appl. Mater. Interfaces 3, 1055 (2011); [4] Schwartzkopf et al. RSC Nanoscale 5, 5053 (2013); [5] Wöhnert, B.Sc. thesis, Univ. Hamburg, (2014)