An original planar multireflection system for sensing using the local surface plasmon resonance of gold nanospheres

We realized a planar multireflection glass system to investigate the localized surface plasmon resonance (LSPR) of gold nanoparticles. These nanospheres were realized it? situ using an original and simple chemical growth method that is described. We were able to observe resonance phenomena as reflected by variations in the spectrum and as enhancements in the refractive index sensing ability. The system was able to clearly discern 2% sucrose solution and demonstrated outstanding linearity and reproducibility. We believe this study could be useful for elucidating the fundamental processes in nanoparticle LSPR and contribute to the realization of new and more efficient sensors.