Fabrication of Ordered Au-Co Nanoparticle Arrays

In this work, we present a novel fabrication strategy for large-area nanoparticle (NP) arrays on flexible glass. Nanosphere lithography (NSL) is used in combination with thermal degradation to produce ordered arrays of gold (Au)/cobalt (Co) NPs. Polystyrene (PS) beads were assembled on Willow (R) glass to form a hexogonally-packed monolayer. Next, Au and Co were applied onto the PS beads using co-deposition via e-beam evaporation. The PS bead template was degraded under high temperature (600 degrees C), leaving behind an ordered Au-Co array with average particle diameter of 118 +/- 11 nm. The total integrated transmission, Tint, and forward scattering, Sf, were measured using a spectrophotometer with an integrating sphere. Both measurements revealed a minimum and maximum peak at similar to 660 nm, respectively.