Localized surface plasmon resonance imaging: Simultaneous single nanoparticle spectroscopy and diffusional dynamics

Julia M. Bingham, Katherine A. Willets, Nilam C. Shah, David Q. Andrews, Richard P. Van Duyne

Research output: Contribution to journalArticlepeer-review

78 Scopus citations

Abstract

A wide-field localized surface plasmon resonance (LSPR) imaging method using a liquid crystal tunable filter is used to measure the scattering spectra of multiple Ag nanoparticles in parallel. This method provides the ability to characterize moving Ag nanoparticles by measuring the scattering spectra of the particles while simultaneously tracking their motion. Consequently, single-particle diffusion coefficients can be determined. As an example, several single Ag nanoprisms are tracked, the LSPR scattering spectrum of each moving particle is obtained, and the single-particle diffusion coefficient is determined from its trajectory. Coupling diffusion information with spectral information in real time is a significant advance and addresses many scientific problems, both fundamental and biological, such as cell membrane protein diffusion, functional plasmonic distributions, and nanoparticle growth mechanisms.

Original languageEnglish (US)
Pages (from-to)16839-16842
Number of pages4
JournalJournal of Physical Chemistry C
Volume113
Issue number39
DOIs
StatePublished - 2009

ASJC Scopus subject areas

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

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