Shown below is a series of structures fabricated by means of the direct laser writing technique with Photonic Professional systems. Typical topics of interest which are under investigation are the study of cell migration or stem cell differentiation. The 3D tailored environment acts as an artificial extracellular matrix, i.e., a scaffold for the cells. Please click on the thumbnails to open a detailled view. Images: F. Klein, J. Fischer, T. Striebel and M. Bastmeyer; University of Karlsruhe (TH)