In the framework of an iba internal strategic project and by financial support of the DAAD (RISE Professional Program) a promising, but also simple molecular architecture was developed enabling the photoinduced release of chemical compounds with primary amines based on one- and two-photon absorption. Silane coupling to the surface and biotin/streptavidin chemistry ensure the stability of the system. Imaging ellipsometry demonstrates the intensity dependent release of the model compound.

a, b) Thickness map of (2D und 3D) of a few nm thick covalently bound aminosilane layer on a SiO₂ substrate.  Photopatterning visualizes the the organic layer. The photolabile linker architecture was bound to the amino functional groups. c) 2-photon excitation releases the model compound bearing an primary amine can be released. (Imaging ellipsometry)