Journal
NANO LETTERS
Volume 10, Issue 12, Pages 5037-5042Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl1032233
Keywords
Ag nanoplates; seeded growth; size distribution focusing; selective ligand adhesion; anisotropic growth
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Funding
- Research Corporation for Science Advancement
- 3M for the Nontenured Faculty Grant
- DuPont
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Silver nanoplates with an extremely high aspect ratio (up to over 400) and a widely tunable surface plasmon resonance (SPR) band have been successfully synthesized by combining the concepts of selective ligand adhesion and seeded growth. Citrate' ligands are used as the sole surfactant to effectively block overgrowth on the basal {111} facets and only allow growth in the lateral direction. By slowing down the reaction rate using Ag-citrate complex as precursor, the thin nature of Ag nanoplates is maintained with the edge length grown up to 4 gm, which ensures the high aspect ratio and the widely tunable SPR band. We also observe a size distribution focusing effect that helps to produce uniform nanoplates as well as narrow SPR bands over a wide range, which is important in many practical applications.
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