Controlling the Shapes of Silver Nanocrystals with Different Capping Agents
This paper provides direct evidence to support the role of a capping agent in controlling the evolution of Ag seeds into nanocrystals with different shapes. Starting with single-crystal seeds (spherical or cubic in shape), we could selectively obtain Ag octahedrons enclosed by {l_brace}111{r_brace} facets and nanocubes/nanobars enclosed by {l_brace}100{r_brace} facets by adding sodium citrate (Na{sub 3}CA) and poly(vinyl pyrrolidone) (PVP), respectively, as a capping agent while all other parameters were kept the same. This research not only offers new insights into the role played by a capping agent in shape-controlled synthesis but also provides, for the first time, Ag octahedrons as small as 40 nm in edge length for optical and spectroscopic studies.
- Research Organization:
- BROOKHAVEN NATIONAL LABORATORY (BNL)
- Sponsoring Organization:
- DOE - Office Of Science
- DOE Contract Number:
- AC02-98CH10886
- OSTI ID:
- 990712
- Report Number(s):
- BNL--93937-2010-JA; KC0201010
- Journal Information:
- Journal of the American Chemical Society, Journal Name: Journal of the American Chemical Society Journal Issue: 25 Vol. 132; ISSN JACSAT; ISSN 0002-7863
- Country of Publication:
- United States
- Language:
- English
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