Low viscosity fluids with tunable optical properties can be processed to manufacture thin film and interfaces for
molecular detection, light trapping in photovoltaics and reconfigurable optofluidic devices. In this work, self-assembly in
wormlike micelle solutions is used to uniformly distribute various metallic nanoparticles to produce stable suspensions
with localized, multiple wavelength or broad-band optical properties. Their spectral response can be robustly modified
by varying the species, concentration, size and/or shape of the nanoparticles. Structure, rheology and optical properties
of these plasmonic nanogels as well as their potential applications to efficient photovoltaics design are discussed.