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A colloidal two-step seeded-growth approach has been devised to selectively synthesize three-component magnetic/semiconductor hybrid nanocrystals (HNCs) with a matchstick-like profile and tunable geometric parameters. The newly developed heterostructures individually comprise a single metallic Co head connected to either apexes of one rod-shaped section made of a CdSe core eccentrically embedded in a CdS shell. The specific topological arrangement realized arises from the peculiar anisotropic reactivity of the noncentrosymmetric CdSe@CdS core@shell nanorods that have been used as substrates to seed heterogeneous nucleation of Co in a surfactant-free environment from an organometallic precursor. The HNCs retain appreciable fluorescent emission in spite of photoexcited charge transfer from the semiconductor to the metal domain and exhibit unusual ferromagnetic-like behavior at room …
American Chemical Society
Publication date: 
9 Sep 2009

Sasanka Deka, Andrea Falqui, Giovanni Bertoni, Claudio Sangregorio, Giordano Poneti, Giovanni Morello, Milena De Giorgi, Cinzia Giannini, Roberto Cingolani, Liberato Manna, P Davide Cozzoli

Biblio References: 
Volume: 131 Issue: 35 Pages: 12817-12828
Journal of the American Chemical Society