1. Institute of Technical Chemistry Forschungszentrum Karlsruhe 76021 Karlsruhe (Germany);2. Robert H. Smith Institute of Plant Science and Genetics Hebrew University Rehovot (Israel);3. Institute of Nanotechnology Forschungszentrum Karlsruhe 76021 Karlsruhe (Germany);4. DFG Center for Functional Nanostructures Wolfgang Gaede Str. 1 76131 Karlsruhe (Germany);5. Institute for Biological Interfaces Forschungszentrum Karlsruhe 76021 Karlsruhe (Germany)