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26 August 2008 A sensitivity study of the localised surface plasmon resonance of high-definition structured silver nanoparticles in solution
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Abstract
Within this work we present a new class of shaped silver nanoparticle ensembles which have demonstrated high sensitivities to variations in the refractive index of their surrounding environment. The ensembles' collective response has proven to exceed that of other sensitivities quoted in literature by various other nanoparticle structures, with sensitivity values of up to 376.6 nm/RIU recorded. A quick, simple sucrose sensitivity test has been developed in which any corresponding shift in the nanoparticles' spectrum can be associated solely to a change in the surrounding refractive index. AFM, TEM and dynamic light scattering characterisation of the mean diameter and height distributions of the nanoparticle ensembles provides information on the relationship between the structural properties of the nanoparticles and their sensitivity.
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Denise Charles, Patrick Fournet, Stephen Cunningham, Deirdre Ledwith, John M. Kelly, Werner Blau, and Margaret Brennan Fournet "A sensitivity study of the localised surface plasmon resonance of high-definition structured silver nanoparticles in solution", Proc. SPIE 7032, Plasmonics: Metallic Nanostructures and Their Optical Properties VI, 70322G (26 August 2008); https://doi.org/10.1117/12.804259
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