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Peptide selectivity for patterned GaAs. Fluorescently labeled phage displaying a peptide specifically selected to bind to GaAs bind only to the patterned GaAs nested square pattern on a wafer. The red lines (1 μm across) correspond to GaAs and the black spaces (4 μm across) are SiO2. This peptide-specific binding could also be used to deliver nanocrystals to specific locations.
