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.
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Xia YN, 2001, ADV MATER, V13, P409, DOI 10.1002/1521-4095(200103)13:6<409::AID-ADMA409>3.0.CO