Showing papers by "Martyn A. McLachlan published in 2009"
TL;DR: This contribution presents the first preparation of patterned arrays of highly ordered polystyrene colloidal crystal structures on flexible functional substrates, and the success of the optimized protocol was illustrated by the deposition of ordered structures on a range of functionalized rigid and flexible substrates.
Abstract: This contribution presents the first preparation of patterned arrays of highly ordered polystyrene colloidal crystal structures on flexible functional substrates. The formation of patterned arrays of colloidal crystals over large areas (5x1 cm) with periodic line patterns ranging in pitch from 25 to 450 microm is demonstrated. The protocol developed to achieve this is applicable to a wide-range of substrates and is inherently scalable. Interestingly, directed colloidal deposition was found to be more susceptible to fluctuations in the deposition conditions than bulk deposition. The conditions required for directed deposition were systematically investigated, and the success of the optimized protocol was illustrated by the deposition of ordered structures on a range of functionalized rigid and flexible substrates. These advances-low-cost production on flexible functional substrates and the fabrication of structures of controlled geometry-address two of the major challenges in developing devices using colloidal crystal structures.
8 citations
TL;DR: The mechanism for formation of large-scale ordered structures of copper and silver by direct electrodeposition through colloidal crystal templates is investigated and it is demonstrated that the morphology is controlled by the diffusion of reactant species from the bulk solution to the electrode surface.
Abstract: We have investigated the mechanism for formation of large-scale ordered structures of copper and silver by direct electrodeposition through colloidal crystal templates. It is demonstrated that the morphology is controlled by the diffusion of reactant species (metal cations and oxygen molecules) from the bulk solution to the electrode surface. The Cu system can be tuned to fill or not to fill the original drying cracks in the template in order to produce isolated or interconnected domains. This has great potential for the formation of individual or interconnected antennae in nanoplasmonic structures.
6 citations