This presentation will center on our recent developments in shape-controlled synthesis of silver nanocrystals. The syntheses were based on the strategy of seed-mediated growth. The key to the success in shaping silver nanocrystals relied on our ability to control the growth of a seed along specific directions by using thermodynamic or kinetic approaches. Taking the overgrowth of silver cubic seed as an example, when the growth was controlled along the directions, truncated cubes, cuboctahedrons, and octahedrons were obtained. However, concave cubes, octapods, and trisoctahedrons were formed when the overgrowth was switched to the directions. The strategy was also successfully extended to other types of seeds (e.g., spherical and plate-like seeds), producing a set of Ag nanocrystals with new shapes. Shape-depended optical properties of those Ag nanocrystals will also be systematically discussed.

Shape-controlled synthesis of silver nanocrystals and their optical properties

245th National Meeting (2013)

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