Key words: self-organization of Pd-Ni nanowires, consisting of nanocrystallites in amorphous matrix; architecture of mesoscopic 3D-structures, composed of nanowires. AbstractThe architecture of novel metallic mesostructures obtained via self-organization of growing nanowires has been investigated. Seashell-, fungus-and lotus leaf-shaped structures are reproducibly formed by programmable pulse current electrodeposition on porous membranes. The samples several millimeters in size are obtained. SEM investigation has revealed that the frame of the metallic "seashell" presents a hierarchical system with elements of fractal self-similarity at the nano-and micro-levels. The frame is a volumetric multilayer net with conical bundles of nanowires as building blocks. The Pd-Ni nanowires have V-like branches and periodic bulges ("beads"). TEM study showed that the nanowires consist of nanocrystallites dispersed in an amorphous matrix. Their sizes range from 4 to 15 nm. Local inhomogeneity of Pd-Ni solid solution was observed. In perspective, the proposed technique can be used as a 3D printer for the purposeful synthesis of novel materials with complex quantum nano-architecture.2

Key words: self-organization of Pd-Ni nanowires, consisting of nanocrystallites in amorphous matrix; architecture of mesoscopic 3D-structures, composed of nanowires. AbstractThe architecture of novel metallic mesostructures obtained via self-organization of growing nanowires has been investigated. Seashell-, fungus-and lotus leaf-shaped structures are reproducibly formed by programmable pulse current electrodeposition on porous membranes. The samples several millimeters in size are obtained. SEM investigation has revealed that the frame of the metallic "seashell" presents a hierarchical system with elements of fractal self-similarity at the nano-and micro-levels. The frame is a volumetric multilayer net with conical bundles of nanowires as building blocks. The Pd-Ni nanowires have V-like branches and periodic bulges ("beads"). TEM study showed that the nanowires consist of nanocrystallites dispersed in an amorphous matrix. Their sizes range from 4 to 15 nm. Local inhomogeneity of Pd-Ni solid solution was observed. In perspective, the proposed technique can be used as a 3D printer for the purposeful synthesis of novel materials with complex quantum nano-architecture.2

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