Measurements of refractive index change due to positive ions using a surface plasmon resonance sensor Academic Article uri icon


  • 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. 2009 Elsevier B.V. All rights reserved.

published proceedings


author list (cited authors)

  • Ko, H., Kameoka, J., & Su, C. B.

citation count

  • 5

complete list of authors

  • Ko, Hyungduk||Kameoka, Jun||Su, Chin B

publication date

  • January 2009