Surfactant-directed synthesis and optical properties of one-dimensional plasmonic metallic nanostructures

Catherine J. Murphy, Tapan K. Sau, Anand Gole, Christopher J. Orendorff

Research output: Contribution to journalReview article

Abstract

One-dimensional metallic nanostructures such as nanorods and nanowires are of tremendous interest for electronic, sensing, and catalytic applications. Shape anisotropy introduces new optical properties in gold and silver nanoparticles, such as longitudinal plasmon resonance bands in the visible and near-IR portion of the spectrum. Different approaches employed for the shape-controlled synthesis of silver and gold nanocrystals include chemical, electrochemical, and physical methods. The chemical route for the synthesis of nanorods and nanowires, in which metal salts are reduced in an aqueous solution, is one of the most widely used methods. This route commonly employs a surfactant as the directing agent to introduce asymmetry in the nanocrystal shape. Variation in the concentration of precursor salt and the surfactant, the nature of the surfactant, the nature and concentration of reducing agents, the presence of external salts, and the pH of the reaction solution all affect nanocrystal shape, dimension, and yield. The size and shape of the nanocrystals affect the position of the plasmon bands, which in turn has been widely used in surface-enhanced spectroscopies that include both Raman and fluorescence. The aqueous, surfactant-directed route also promises the synthesis of more complex nanostructures with additional desirable properties.

Original languageEnglish (US)
Pages (from-to)349-355
Number of pages7
JournalMRS Bulletin
Volume30
Issue number5
DOIs
StatePublished - May 2005

Fingerprint

Surface-Active Agents
Nanocrystals
Nanostructures
Surface active agents
Optical properties
surfactants
nanocrystals
optical properties
Salts
synthesis
Nanorods
Silver
Gold
Nanowires
routes
salts
nanorods
nanowires
silver
Reducing Agents

Keywords

  • Metallic nanostructures
  • Nanorods
  • Nanowires
  • Plasmonics
  • Surfactant-directed synthesis

ASJC Scopus subject areas

  • Materials Science(all)
  • Physics and Astronomy (miscellaneous)

Cite this

Surfactant-directed synthesis and optical properties of one-dimensional plasmonic metallic nanostructures. / Murphy, Catherine J.; Sau, Tapan K.; Gole, Anand; Orendorff, Christopher J.

In: MRS Bulletin, Vol. 30, No. 5, 05.2005, p. 349-355.

Research output: Contribution to journalReview article

Murphy, Catherine J. ; Sau, Tapan K. ; Gole, Anand ; Orendorff, Christopher J. / Surfactant-directed synthesis and optical properties of one-dimensional plasmonic metallic nanostructures. In: MRS Bulletin. 2005 ; Vol. 30, No. 5. pp. 349-355.
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