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.