Thermoelectric materials are a very interesting topic of actual research due to their capability of converting heat into electricity without any moving parts and without the need of huge temperature gradients. A very promising and already used material is Sb2Te3. For further understanding the structure property relations in this material and optimizing its thermoelectric properties, epitaxial thin films have been synthesized by PVD and studied in the FEI TITAN ETEM. Thermal conductivity measurements have been made using the 3omega method. Furthermore, the Kapitza resistance of various involved interfaces has been determined, allowing for high precision determination of the film thermal conductivity. The analysis shows that the nearly single crystalline films show a remarkably small cross plane (c-axis) thermal conductivity pointing to an intrinsic limitation by the layered structure.
Highly filled particulate nanocomposite films consisting of metal nanoparticles in a dielectric organic or ceramic matrix have
unique functional properties with hosts of applications. In most applications, a high filling factor close to the percolation
threshold with control of the particle separation on the nm scale is essential because the functional properties often require
short range interaction between nanoparticles. The present talk demonstrates how vapor phase deposition techniques can be
employed for tailoring the nanostructure and the resulting properties. Vapor phase deposition, inter alia, allows excellent
control of the metallic filling factor and its depth profile as well as the incorporation of alloy nanoparticles with well-defined
composition. We applied various methods such as sputtering, evaporation, and plasma polymerization for the deposition of
the matrix component, while the metallic components were mostly sputter-deposited or evaporated. Moreover, a high-rate gas
aggregation cluster source was utilized to obtain independent control of filling factor and size of the embedded nanoparticles.
Examples include optical composites with tuned particle surface plasmon resonances for plasmonic applications [ 1],
magnetic high frequency materials with cut-off frequencies well above 1 GHz , sensors and photoswitchable devices 
that are based on the huge change in the electronic properties near the percolation threshold, and biocompatible antibacteria l
coatings with tailored release rate . In addition to the particulate composites, a new concept of layered magnetoelectric
composites will be presented for robust, fully integrable, broad band magnetic field sensors based on the delta E effect .
 M. Keshavarz Hedayati, M. Javaherirahim, B. Mozooni, R. Abdelaziz, A. Tavassolizadeh, V.S.K. Chakravadhanula, V.
Zaporojtchenko, T. Strunskus, F. Faupel, M. Elbahri, Design of a perfect black absorber at visible frequencies using
plasmonic materials, Adv. Mater. 23 (2011) 5410.
 H. Greve, C. Pochstein, H. Takele, V. Zaporojtchenko, F. Faupel, A. Gerber, M. Frommberger, E. Quandt,
Nanostructured magnetic Fe-Ni-Co/Teflon multilayers for high frequency applications in the gigahertz range, Appl. Phys.
Lett. 89 (2006) 242501.
 S.W. Basuki, V. Schneider, T. Strunkus, M. Elbahri, F. Faupel, Light-Controlled Conductance Switching in Azobenzene-
Containing MWCNT–Polymer Nanocomposites, ACS Appl. Mater. Interfaces 7 (2015