Synthesis and Optical Properties of "Branched" Gold Nanocrystals

Encai Hao, Ryan C. Bailey, George C Schatz, Joseph T Hupp, Shuyou Li

Research output: Contribution to journalArticle

490 Citations (Scopus)

Abstract

We report the synthesis of new "branched" gold nanocrystals in high yield (over 90%) via a wet-chemical route. The branched nanocrystals exhibit a shape-dependent plasmon resonance that is red-shifted by 130-180 nm from the spherical particle wavelength. Discrete dipole approximation (DDA) calculations qualitatively replicate the observed optical extinction spectra of the nanocrystals, indicating that the surface plasmon resonance is mainly determined by in-plane dipole excitation associated with the sharp tips.

Original languageEnglish
Pages (from-to)327-330
Number of pages4
JournalNano Letters
Volume4
Issue number2
DOIs
Publication statusPublished - Feb 2004

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Gold
Nanocrystals
nanocrystals
Optical properties
gold
optical properties
synthesis
dipoles
Surface plasmon resonance
surface plasmon resonance
extinction
routes
Wavelength
approximation
wavelengths
excitation

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Synthesis and Optical Properties of "Branched" Gold Nanocrystals. / Hao, Encai; Bailey, Ryan C.; Schatz, George C; Hupp, Joseph T; Li, Shuyou.

In: Nano Letters, Vol. 4, No. 2, 02.2004, p. 327-330.

Research output: Contribution to journalArticle

Hao, Encai ; Bailey, Ryan C. ; Schatz, George C ; Hupp, Joseph T ; Li, Shuyou. / Synthesis and Optical Properties of "Branched" Gold Nanocrystals. In: Nano Letters. 2004 ; Vol. 4, No. 2. pp. 327-330.
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