Abstract
In this chapter, we explore the sensitivity of gold nanorods toward changes in the dielectric constant of the surrounding medium. Experimental data for pure and silica-coated nanorods with varying shell thickness are compared to calculations based on the boundary element method (BEM). They indicate that anisotropy and sharp tips make nanoparticles more environmentally sensitive. We also find that sensitivity decreases as silica shell thickness increases, as expected from a dielectric screening effect. Even when coated with thin shells, gold nanorods are found to be excellent candidates for biosensing applications.
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Liz-Marzán, L.M., Pérez-Juste, J., Pastoriza-Santos, I. (2008). Plasmonics of Gold Nanorods. Considerations for Biosensing. In: Giersig, M., Khomutov, G.B. (eds) Nanomaterials for Application in Medicine and Biology. NATO Science for Peace and Security Series. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-6829-4_9
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