By A. Menelle, 05/06/2014
The implementation of nano-objects in numerous emerging applications often demands their integration in macroscopic devices. Here we present the bottom-up epitaxial solution growth of high-density arrays of vertical 5 nm diameter single-crystalline metallic cobalt nanowires on wafer-scale crystalline metal surfaces. The nanowires form regular hexagonal arrays on unpatterned metallic films. These hybrid heterostructures present an important perpendicular magnetic anisotropy and pave the way to a high density magnetic recording device, with capacities above 10 Terabits/in2. This method bypasses the need of assembling and orientating free colloidal nanocrystals on surfaces. Its generalization to other materials opens new perspectives toward many applications.
Solution Epitaxial Growth of Cobalt Nanowires on Crystalline Substrates for Data Storage Densities beyond 1 Tbit/in2
Nikolaos Liakakos, Thomas Blon, Charbel Achkar, Virginie Vilar, Benoit Cormary, Reasmey P. Tan, Omar Benamara, Grégory Chaboussant, Frédéric Ott, Bénédicte Warot-Fonrose, Etienne Snoeck, Bruno Chaudret, Katerina Soulantica, and Marc Respaud