Journal
SCIENCE
Volume 290, Issue 5499, Pages 2126-2129Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.290.5499.2126
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We show a simple, robust, chemical route to the fabrication of ultrahigh-density arrays of nanopores with high aspect ratios using the equilibrium self-assembled morphology of asymmetric diblock copolymers. The dimensions and Lateral density of the array are determined by segmental interactions and the copolymer molecular weight. Through direct current electrodeposition, we fabricated vertical arrays of nanowires with densities in excess of 1.9 x 10(11) wires per square centimeter. We found markedly enhanced coercivities with ferromagnetic cobalt nanowires that point toward a route to ultrahigh-density storage media. The copolymer approach described is practical, parallel, compatible with current Lithographic processes, and amenable to multilayered device fabrication.
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