DNA-Assembled Nanoparticle MetamaterialsPublic Deposited
Electromagnetic metamaterials composed of colloidally synthesized plasmonic metal nanoparticles offer new opportunities to probe light-matter interactions. The properties of these structures largely depend on the spatial arrangement of nanoparticles within them. Therefore, new assembly strategies that afford a high level of structural control are expected to enable a broad range of new and improved functions. In this dissertation, DNA-mediated assembly has been combined with top-down lithography to program the formation of nanoparticle metamaterials on surfaces. Specifically, colloidal gold nanoparticles of different shapes and sizes are programmed to assemble into precisely controlled architectures via a template-confined DNA-mediated assembly strategy. With this strategy, the placement of each individual nanoparticle at the nano-scale and the long-range ordering of metamaterials at the macro-scale can be defined and predetermined independent of one another. These unique metamaterials would be difficult, if not impossible, to construct via any other method, and provide a platform to systematically study and control light-matter interactions in nanoparticle-based metamaterials.
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