Spontaneous Nanoripple Formation on Metallic Templates

P.C. DOS SANTOS CLARO; M. F. CASTEZ; P. L. SCHILARDI; N. B. LUQUE; E. LEIVA; R. C. SALVAREZZA

ACS Nano

American Chemical Society

Lugar: Washington, DC; Año: 2008 vol. 2 p. 2531 - 2539

1936-0851

NOTA: todos los autores han contribuido de igual manera a la elaboración de este trabajo.Nanoripple structures spontaneously formed during chemical and electrochemical deposition of metals, semiconductors and alloys on gold and copper templates patterned with nanocavities have been studied by atomic force microscopy (AFM) and scanning tunneling microscopy (STM). Annealing of the templates at low temperatures also results in ripple formation. Experimental results and modeling including anisotropic surface diffusion, demonstrate that nanocavities size in the template, determines the ripple wavelength and amplitude before a final stage of coarsening. Therefore, an ordered array of “nanodefects” introduced in the substrate is able to guide the self-organization of these nanofeatures during their growth, creating the possibility for nanofabrication of parallel interconnections with adjustable periodicity. Ripples are robust nanostructures that can also be used as templates for the preparation of hybrid nanostructured surfaces with specific physical properties.