We report a method to fabricate functional oxide nanostructures ordered over the centimeter scale. Self-assembly of SrTiO 3 (001) chemical terminations through appropriate thermal processing leads to large-area chemical nanopattering of the surface. Such nanopatterned surfaces, stable at relatively high temperature, can be used as template to grow functional ordered nanostructures, exploiting the termination-dependent nucleation. As an example of this potential, we have fabricated ordered arrays of conducting epitaxial SrRuO 3 nanostripes separated by insulating trenches. Conductivity maps by atomic force microscopy confirm the coexistence of sharp conducting/insulating regions in low-dimensional structures.
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Bachelet et al. (2009) studied this question.
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