Measurements of refractive index change due to positive ions using a surface plasmon resonance sensor

Hyungduk Ko*, Jun Kameoka, Chin B. Su

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

A 44-pass fiber optic surface plasmon resonance (SPR) sensor coupled with a field-assist capability for measurement of refractive index change due to positive and negative ions is shown. The field-assist feature forces ions to the SPR surface, causing the SPR signal response to change which reflects a decrease or increase in refractive index depending on whether positive or negative ions are being attracted to the surface. This technique offers the potential for the sensitive detection of cations and anions in a solution.

Original languageEnglish
Pages (from-to)381-386
Number of pages6
JournalSensors and Actuators, B: Chemical
Volume143
Issue number1
DOIs
Publication statusPublished - 2009 Dec 4
Externally publishedYes

Keywords

  • Fiber optic SPR sensor
  • Multi-pass SPR sensor
  • Surface plasmon resonance

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

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