Pt-Ag nanoboxes prepared using a Pt(4+) versus Pt(2+) precursor show not only stoichiometric, but also catalytic effects on the nanobox growth, resulting in metal content and surface morphology differences. Electrochemical studies on these nanoboxes reveal the combined importance of composition and hollow, rough-walled nanostructure for improved detection of electroactive molecules.
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Effect of metal precursor on the growth and electrochemical sensing properties of Pt-Ag nanoboxes.
Chem Commun (Camb)
July 2014
Department of Chemistry, Case Western Reserve University, 10900 Euclid Ave., Cleveland, OH 44106, USA.
Pt-Ag nanoboxes prepared using a Pt(4+) versus Pt(2+) precursor show not only stoichiometric, but also catalytic effects on the nanobox growth, resulting in metal content and surface morphology differences. Electrochemical studies on these nanoboxes reveal the combined importance of composition and hollow, rough-walled nanostructure for improved detection of electroactive molecules.
View Article and Find Full Text PDFTailoring galvanic replacement reaction for the preparation of Pt/Ag bimetallic hollow nanostructures with controlled number of voids.
ACS Nano
August 2012
Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore 117576.
Here we report the synthesis of Pt/Ag bimetallic nanostructures with controlled number of void spaces via a tailored galvanic replacement reaction (GRR). Ag nanocubes (NCs) were employed as the template to react with Pt ions in the presence of HCl. The use of HCl in the GRR caused rapid precipitation of AgCl, which grew on the surface of Ag NCs and acted as a removable secondary template for the deposition of Pt.
View Article and Find Full Text PDFOptical properties of Pd-Ag and Pt-Ag nanoboxes synthesized via galvanic replacement reactions.
Nano Lett
October 2005
Department of Chemistry, University of Washington, Seattle, WA 98195, USA.
Silver nanocubes dispersed in water were transformed into Pd-Ag or Pt-Ag nanoboxes by adding either Na(2)PdCl(4) or Na(2)PtCl(4). By controlling the amount of noble metal salt added, and therefore the molar ratio of Na(2)PdCl(4) or Na(2)PtCl(4) to Ag, we could tune the surface plasmon resonance peak of the nanostructures across the entire visible spectrum, from 440 to 730 nm. Replacement of Ag with Pd resulted in the formation of a nanobox composed of a Pd-Ag alloy single crystal, but the nanobox formed after replacement of Ag with Pt was instead composed of distinct Pt nanoparticles.
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