Edited by Wendel Wohlleben, Advanced Materials and Systems Research, Department of Material Physics, BASF SE, Ludwigshafen, Germany Thomas A.J. Kuhlbusch, Air Quality and Sustainable Nanotechnology Unit, Institute of Energy and Environmental Technology (IUTA) e.V, Duisburg, Germany Jürgen Schnekenburger, Biomedical Technology Center, Westfälische Wilhelms-Universität, Münster, Germany Claus-Michael Lehr, Helmholtz-Institute for Pharmaceutical Research Saarland (HIPS) Helmholtz Centre for Infection Research (HZI) and Department of Biopharmaceutics and Pharmaceutical Technology, Saarland University, Saarbrücken, Germany