title: Improved Sensitivity of Localized Surface Plasmon Resonance Transducers Using Reflection Measurements.
abstract: The refractive index sensitivity (RIS) of a localized surface plasmon resonance (LSPR) transducer is one of the key parameters determining its effectiveness in sensing applications. LSPR spectra of nanoparticulate gold films, including Au island films prepared by evaporation on glass and annealing as well as immobilized Au nanoparticle (NP) films, were measured in the transmission and reflection modes. It is shown that the RIS, measured as the wavelength shift in solvents with varying refractive index (RI), is significantly higher in reflection measurements.
authors: Department of Materials and Interfaces, Weizmann Institute of Science, Rehovot 76100, Israel.
authors: Ofer
authors: O
authors: Kedem
authors: Department of Materials and Interfaces, Weizmann Institute of Science, Rehovot 76100, Israel.
authors: Alexander
authors: A
authors: Vaskevich
authors: Department of Materials and Interfaces, Weizmann Institute of Science, Rehovot 76100, Israel.
authors: Israel
authors: I
authors: Rubinstein
keywords: gold; islands; localized plasmon; nanoparticles; reflectivity; refractive index sensitivity