Silver nanoparticles are assembled only on the two facets of the rod template.

Although the focus of nano-research appears to be shifting to the creation of the secondary structures using primary nanoparticle (NP) building blocks, very complex preparation routes to assemble NPs have been reported so far. In this work, for the first time, we demonstrate that silver NPs can be organized to assemble on the two facets of the 1-dimensional rod template via facile one-step process. This method could potentially be used to prepare assembly of diverse metal, semiconductor, or metal oxide NPs in the one dimensional material form.