Abstract
An optical chemical sensor based on laser-excited surface plasmon resonance has been developed for detecting some chemical species. When the medium outside a silver thin film is changed from air to Nafion film, the resonance angle changes from 23.39 to 52.8°. Moreover, as some chemical species, e.g., methylene blue or Ru(byp) 3 2+, is incorporated into the Nafion thin film by using the corresponding solutions, the angle of incidence varies.
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