Self-assembly techniques are used to build complex amorphous structures from plasmonic particles. The assembly
makes use of surface chemistry and intermolecular interactions between surfaces, surfactants, polymers and particles.
The resulting two- or three-dimensional structures have optical properties that derive from the coupling between
particles. A high control of the structural parameters on the nanometer scale can easily be achieved. In contrast to top-down
techniques relatively large areas can be prepared in a versatile manner thus paving the way to applications as
functional devices. Several structures are discussed such as layered arrays of gold nanoparticles, core-shell structures and
hierarchical structures. The optical properties of these structures are also presented and compared with simulations.
Some of the structures are of interest for plasmonic cloaking whereas other might find applications as substrates for
sensing by surface-enhanced Raman spectroscopy.
"Plasmonic nanoparticles assemblies: preparation, structural, and optical properties", Proc. SPIE 8423, Metamaterials VII, 842318 (1 May 2012); doi: 10.1117/12.921841; https://doi.org/10.1117/12.921841