Sebastian Volz has been developing direct simulations and characterizations to understand the role of phonons, electrons and photons in the thermal behaviour of micro and nano-structures. His group is involved in large european projects on thermoelectric micro-modules and thermal interface materials. Sebastian Volz has also been leading the european Thermal NanoSciences and NanoEngineering network of the CNRS that has edited two books (Springer, Topics in Applied Physics series, n° 107 and 118).