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Bi2Se3 nanoribbons and nanowires were synthesized by Au-catalyzed and catalyst-free chemical vapor deposition methods. The growth of Au-catalyzed Bi2Se3 nanoribbons and nanowires is governed by the vapor-solid-solid mechanism, and the nanoribbons grow along <1120> and the nanowires grow along <0001> directions. Catalyst-free grown Bi2Se3 nanoribbons are found to have a growth direction...
CeO 2 –TiO 2 composite nanorods and nanoparticles were synthesized by hydrothermal and co-precipitation methods, respectively; with the CeO 2 –TiO 2 composite of different morphologies as supports, Au/CeO 2 –TiO 2 catalysts were prepared by the colloidal deposition method and used in CO oxidation at ambient temperature. N 2 sorption, XRD, HRTEM,...
Here, we report the ensemble-averaged measurement of SERS hot spots EF from spatially isolated colloidal nanoclusters. This approach was achieved by well-defined Au@Ag core-shell NP dimers and trimers-the simplest structure to investigate SERS hot spots phenomenon. These hot spots units with similar nature were made up of uniform Au@Ag NPs attached by a close-paking Raman reporter monolayer, then...
The assembly of gold nanoparticles (AuNPs) with valency control was explored in colloidal reactions. In this system, thiol-functionalized AuNPs (A-NPs) were reacted with excess citrate-stabilized AuNPs (B-NPs). By tuning the strength of charge repulsion between the B-NPs, NPs clusters of formulae AB, AB2, AB3 and AB4 were obtained. Polymer encapsulation of these nanostructures maintained the structural...
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