Topologically controlled growth of magnetic-metal-functionalized semiconductor oxide nanorods |
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Authors: | Casavola Marianna Grillo Vincenzo Carlino Elvio Giannini Cinzia Gozzo Fabia Pinel Enrique Fernandez Garcia Miguel Angel Manna Liberato Cingolani Roberto Cozzoli Pantaleo Davide |
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Affiliation: | National Nanotechnology Laboratory of CNR-INFM, Unità di Ricerca IIT, Distretto Tecnologico ISUFI, via per Arnesano km 5, 73100 Lecce, Italy. |
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Abstract: | Colloidal semiconductor-magnetic hybrid nanocrystals with topologically controlled composition are fabricated by heterogeneous nucleation of spherical epsilon-Co domains onto anatase TiO2 nanorods. The latter can be selectively decorated at either their tips or at multiple locations along their longitudinal sidewalls, forming lattice-matched heterointerfaces regardless of the metal deposition sites. The possibility of switching between either heterostructure growth modes arises from the facet-dependent chemical reactivity of the oxide seeds, which is governed mainly by selective adhesion of the surfactants rather than by small differences in misfit-induced interfacial strain at the relevant junction points. |
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