Synthesis and Optical Properties of "Branched" Gold Nanocrystals

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

doi:10.1021/nl0351542

Synthesis and Optical Properties of "Branched" Gold Nanocrystals

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

^*Corresponding author for this work

Chemistry

Research output: Contribution to journal › Article › peer-review

549 Scopus citations

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 language	English (US)
Pages (from-to)	327-330
Number of pages	4
Journal	Nano letters
Volume	4
Issue number	2
DOIs	https://doi.org/10.1021/nl0351542
State	Published - Feb 1 2004

ASJC Scopus subject areas

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

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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.",

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AU - Hao, Encai

AU - Bailey, Ryan C.

AU - Schatz, George C.

AU - Hupp, Joseph T.

AU - Li, Shuyou

PY - 2004/2/1

Y1 - 2004/2/1

N2 - 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.

AB - 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.

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Synthesis and Optical Properties of "Branched" Gold Nanocrystals

Abstract

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