title: Fluorescent asymmetrically cobalt-tipped CdSe@CdS core@shell nanorod heterostructures exhibiting room-temperature ferromagnetic behavior.
abstract: 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 temperature.
authors.affiliation: National Nanotechnology Laboratory of CNR-INFM, Unità di Ricerca IIT, Distretto Tecnologico ISUFI, via per Arnesano km 5, I-73100 Lecce, Italy. ssdeka@gmail.com
authors.forename: Sasanka
authors.initials: S
authors.lastname: Deka
authors.forename: Andrea
authors.initials: A
authors.lastname: Falqui
authors.forename: Giovanni
authors.initials: G
authors.lastname: Bertoni
authors.forename: Claudio
authors.initials: C
authors.lastname: Sangregorio
authors.forename: Giordano
authors.initials: G
authors.lastname: Poneti
authors.forename: Giovanni
authors.initials: G
authors.lastname: Morello
authors.forename: Milena
authors.initials: M
authors.lastname: De Giorgi
authors.forename: Cinzia
authors.initials: C
authors.lastname: Giannini
authors.forename: Roberto
authors.initials: R
authors.lastname: Cingolani
authors.forename: Liberato
authors.initials: L
authors.lastname: Manna
authors.forename: P Davide
authors.initials: PD
authors.lastname: Cozzoli