June 28, 1996Science2,374 citations
Shape-Controlled Synthesis of Colloidal Platinum Nanoparticles
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Key Points
- The aim is to control the shapes and sizes of platinum nanoparticles through concentration ratios during synthesis.
- Controlled synthesis of colloidal platinum nanoparticles at room temperature
- Varied ratio of capping polymer to platinum cation concentration
- Observation of various shapes including tetrahedral, cubic, and icosahedral
- Different shapes of nanoparticles were observed based on the concentration ratio.
- Shapes included tetrahedral, cubic, irregular-prismatic, icosahedral, and cubo-octahedral.
- Controlling nanoparticle shapes is suggested to enhance their catalytic properties.
Abstract
The shapes and sizes of platinum nanoparticles were controlled by changes in the ratio of the concentration of the capping polymer material to the concentration of the platinum cations used in the reductive synthesis of colloidal particles in solution at room temperature. Tetrahedral, cubic, irregular-prismatic, icosahedral, and cubo-octahedral particle shapes were observed, whose distribution was dependent on the concentration ratio of the capping polymer material to the platinum cation. Controlling the shape of platinum nanoparticles is potentially important in the field of catalysis.
Cite This Study
Ahmadi et al. (1996) studied this question.