engleski

Enhancement of chemical sensors based on plasmonic metamaterials utilizing metal-organic framework thin films

Surface plasmon resonance-based devices belong to the most convenient and ultrasensitive label-free chemical or biological sensors. A generalization of these devices are sensors based on plasmonic metamaterials, where on is able to utilize the 'Catalysis Plus' concept to improve the adsorption of the targeted analyte. To this purpose one designs a hybride structure that simultaneously represents an ordered metal-dielectric medium with metamateral properties and a porpus medium with pores representing the building blocks of the metamaterial. Adsorption is greately enhances in pores owing to the large effective surface, and this in turn causes large changes of refractive index due to the presence of adsorbed analyte, thus modulating evanescent wave propagation and facilitating chemical detection at lower levels of analyte.

chemical sensors ; metal-organic framework

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