Optical response of gold-nanoparticle-amplified surface plasmon resonance spectroscopy

Yuichi Uchiho, Masayuki Shimojo, Kazuo Furuya, Kotaro Kajikawa

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

A simple formalism that predicts optical constants of a two-dimensionally distributed nanoparticle (NP) thin film is presented for analysis of the NP-amplified surface plasmon resonance. The dielectric constant of the NP thin film can be evaluated with simple expressions at low coverages (σ<0.08), whereas the local fields induced by surrounding polarizations of NPs should be taken into account at coverages of σ> 0.08. Analytical and numerical calculations are carried out for evaluating the local fields at different conditions. The Clausius-Mossoti relation, which is usually used for evaluation of dielectric constants of a binary medium, does not hold in the NP thin films, because of the large interparticle distance and/or the retardation effect. We carried out SPR measurements for NP films with different NP coverages, and the results support the proposed analytical formalism. Finally we propose a procedure to evaluate the NP coverage from the NPSPR profile experimentally obtained.

Original languageEnglish
Pages (from-to)4816-4824
Number of pages9
JournalJournal of Physical Chemistry C
Volume114
Issue number11
DOIs
Publication statusPublished - 2010 Mar 25
Externally publishedYes

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Surface plasmon resonance
surface plasmon resonance
Gold
Spectroscopy
gold
Nanoparticles
nanoparticles
spectroscopy
Thin films
Permittivity
thin films
permittivity
formalism
Optical constants
evaluation
profiles

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Electronic, Optical and Magnetic Materials
  • Surfaces, Coatings and Films
  • Energy(all)

Cite this

Optical response of gold-nanoparticle-amplified surface plasmon resonance spectroscopy. / Uchiho, Yuichi; Shimojo, Masayuki; Furuya, Kazuo; Kajikawa, Kotaro.

In: Journal of Physical Chemistry C, Vol. 114, No. 11, 25.03.2010, p. 4816-4824.

Research output: Contribution to journalArticle

Uchiho, Yuichi ; Shimojo, Masayuki ; Furuya, Kazuo ; Kajikawa, Kotaro. / Optical response of gold-nanoparticle-amplified surface plasmon resonance spectroscopy. In: Journal of Physical Chemistry C. 2010 ; Vol. 114, No. 11. pp. 4816-4824.
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