Journal
SMALL
Volume 9, Issue 17, Pages 2880-2886Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.201300200
Keywords
gold; nanostructures; silver; surface plasmon resonance; template synthesis
Categories
Funding
- NTU Start-Up Grant (SUG)
- NTU
- MOE AcRF-Tier1 [RG 44/11]
- MOE AcRF-Tier2
- CRP from NRF Singapore [NRF-CRP5-2009-04]
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Ultrathin triangular gold nanoframes are synthesized in high yield through selective gold deposition on the edges of triangular silver nanoprisms and subsequent silver etching with mild wet etchants. These ultrathin gold nanoframes are surfactant-free with tailorable ridge thickness from 1.8 to 6 nm and exhibit adjustable and distinct surface plasmon resonance bands in the visible and near-IR region. In comparison, etching of the nanoprism template by galvanic replacement can only create frame structures with much thicker ridges, which have much lower catalytic activity for 4-nitrophenol reduction than the ultrathin gold nanoframes.
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