title: Selective growth of metal tips onto semiconductor quantum rods and tetrapods.
abstract: We show the anisotropic selective growth of gold tips onto semiconductor (cadmium selenide) nanorods and tetrapods by a simple reaction. The size of the gold tips can be controlled by the concentration of the starting materials. The new nanostructures display modified optical properties caused by the strong coupling between the gold and semiconductor parts. The gold tips show increased conductivity as well as selective chemical affinity for forming self-assembled chains of rods. Such gold-tipped nanostructures provide natural contact points for self-assembly and for electrical devices and can solve the difficult problem of contacting colloidal nanorods and tetrapods to the external world.
authors.affiliation: Institute of Chemistry, Farkas Center for Light-Induced Processes, Hebrew University of Jerusalem, Jerusalem 91904, Israel.
authors.forename: Taleb
authors.initials: T
authors.lastname: Mokari
authors.forename: Eli
authors.initials: E
authors.lastname: Rothenberg
authors.forename: Inna
authors.initials: I
authors.lastname: Popov
authors.forename: Ronny
authors.initials: R
authors.lastname: Costi
authors.forename: Uri
authors.initials: U
authors.lastname: Banin