Site-Selective Growth of Colloidal Crystals with Photonic Properties on Chemically Patterned Surfaces


  • This work has been supported by the European Community, Marie Curie Fellowship No. MCFI-2002-00179 (C.A.F.). The authors thank Prof. R. Zentel for fruitful discussions and Prof. W. Hofmeister for his help with the UV-vis microscopy.


Microscopically structured colloidal crystals have been self-assembled using capillary forces onto chemically patterned surfaces. It is shown that the wetting meniscus on substrates patterned with hydrophobic and hydrophilic regions acts in this process as self-removing crystallization template (see Figure). By this method, closed-packed structures with a well-defined and intense bandgap in the visible range are obtained.