Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 113, Issue 1, Pages 100-105Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2005.02.034
Keywords
fiber-optic sensor; evanescent wave; gold nanoparticle; nickel ion; streptavidin; Staphytococcal enterotoxin B
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A novel reflection-based localized surface plasmon resonance fiber-optic probe for chemical and biochemical sensing is reported. The sensor is based on intensity measurement of the internal reflected light at a fixed wavelength from an optical fiber where the extinction cross-section of self-assembled gold nanoparticles on the unclad portion of the optical fiber changes with different refractive index of the environment near the gold surface. The reflection-based localized surface plasmon resonance fiber-optic probe has been shown to be capable of direct sensing of the spectroscopically silent Ni2+ ion and label-free detection of streptavidin and staphylococcal enterotoxin B at the picomolar level. (c) 2005 Elsevier B.V. All rights reserved.
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