Triangular nanoframes made of gold and silver

Gabriella S. Métraux, Yunwei Charles Cao, Rongchao Jin, Chad A. Mirkin*

*Corresponding author for this work

Research output: Contribution to journalArticle

310 Scopus citations

Abstract

Silver nanoprisms (∼74-nm edge length) were etched with HAuCl 4 to generate gold-silver alloy framework structures. Interestingly, these triangular nanoframes possess no strong surface plasmon bands in the ultraviolet or visible regions of the optical spectrum. By adding a mild reducing agent, L-ascorbic acid, gold and silver ions remaining in solution can be reduced, resulting in metal plating and reformation of nanoprisms. The extent of the back-filling process can be controlled, allowing one to form novel prisms with nanopores. This back-filling process is accompanied by a regeneration of the surface plasmon bands in the UV-vis spectrum.

Original languageEnglish (US)
Pages (from-to)519-522
Number of pages4
JournalNano letters
Volume3
Issue number4
DOIs
StatePublished - Apr 1 2003

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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