Fabrication of localized surface plasmon resonance fiber probes using ionic self-assembled gold nanoparticles

Miao Wan, Pengfei Luo, Jiayi Jin, Jiong Xing, Zhiyong Wang, Stephen T.C. Wong

Research output: Contribution to journalArticle

21 Scopus citations

Abstract

An nm-thickness composite gold thin film consisting of gold nanoparticles and polyelectrolytes is fabricated through ionic self-assembled multilayers (ISAM) technique and is deposited on end-faces of optical fibers to construct localized surface plasmon resonance (LSPR) fiber probes. We demonstrate that the LSPR spectrum induced by ISAM gold films can be fine-tuned through the ISAM procedure. We investigate variations of reflection spectra of the probe with respect to the layer-by-layer adsorption of ISAMs onto end-faces of fibers, and study the spectral variation mechanism. Finally, we demonstrated using this fiber probe to detect the biotin-streptavidin bioconjugate pair. ISAM adsorbed on optical fibers potentially provides a simple, fast, robust, and low-cost, platform for LSPR biosensing applications.

Original languageEnglish (US)
Pages (from-to)6477-6487
Number of pages11
JournalSensors
Volume10
Issue number7
DOIs
StatePublished - Jul 2010

Keywords

  • Biosensors
  • Fiber optics
  • Ionic self-assembled multilayers
  • Localized surface plasmon resonance

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Atomic and Molecular Physics, and Optics
  • Analytical Chemistry
  • Biochemistry

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