A fiber-optic sensor sensitive to hydrogen peroxide has been designed based on the electrostatic layer-by-layer self-assembly method. Meldola's blue and a catalyst hemin have been deposited in a polymeric structure formed by PAH+ and PAA/sup -/. The concentrations that can be detected range at least between 10/sup -7/ and 10/sup -1/ M, and recovery of the sensor after introduction in a reductive agent has been proved successfully. Some rules for estimation of the refractive index of the material deposited and the thickness of bilayers are also given.
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Villar et al. (2005) studied this question.
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