Metallic Nanobowls: Metallic Nanobowls by Galvanic Replacement Reaction on Heterodimeric Nanoparticles (Small 5/2012)

The cover image features 3D tomograms of “nanobowls”–metallic nanoparticles in the unique shape of a bowl. Each of these tomograms was obtained by the reconstruction of ∼100 images of a given nanoparticle, each taken at a different tilt angle. The nanobowls are prepared by performing the so-called galvanic replacement reaction on nanoparticles comprising two domains, of which only one undergoes the reaction (thereby serving as a “template”), whereas the other acts as a “protecting group.” The morphology of the product is dictated by the reaction temperature; in fact, three distinct types of nanostructures–branched, heterodimeric, and bowl-shaped particles–can be obtained from a single precursor by varying only the reaction temperature. For more information, please read the Communication “Metallic Nanobowls by Galvanic Replacement Reaction on Heterodimeric Nanoparticles” by R. Klajn and co-workers, beginning on page 654.