Ordered Arrays of Mesoporous Microrods from Recyclable Macroporous Silicon Templates


  • This work was supported by the Volkswagen Foundation (Thematic Impetus “Interplay between Molecular Conformations and Biological Function”, Az. I/80 780). Christian Hess thanks the Deutsche Forschungsgemeinschaft (DFG) for providing an Emmy Noether fellowship. We thank Kornelia Sklarek, Dr. Sven Matthias, and Andreas Langner for the preparation of macroporous silicon.


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Ordered arrays of freestanding mesoporous microrods (see figure) are obtained from macroporous silicon templates with hydrophobized pore walls. The microrods can be removed from the template by simple mechanical lift-off. Since no wet-chemical etching step is involved, condensation of the rods is avoided and the template can be recycled. The hierarchical structures combine features on the nano- and microscale and have a well-controlled geometry.