As the field of nanotechnology evolves, it is becoming clear that particle shape is as important as size in determining the chemical and physical properties of a particular nanostructure. This is especially true for noble metal nanoparticles, where the plasmonic and catalytic properties can be finely tuned through control over their morphology. Recent progress on controlling the shape of gold nanoparticles in a seed-mediated synthesis will be discussed, with particular focus on the use of silver as an underpotential deposition agent. In addition to gaining valuable insight as to the role of silver as a shape-directing additive, our findings have resulted in the development of synthetic methods to prepare new and exotic nanostructures, such as concave cubes bound by 24 high-index {720} facets and octahedra with hollow features.

Shape control of gold nanoparticles by silver underpotential deposition

243rd National Meeting (2012)

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