Efficient focusing of optical fields at the nanoscale holds immense potential for sensing, photodetection, spectroscopy, and optical information processing. Metallic nanorods and their assemblies are a promising platform due to their intense light-matter interactions, with an optical cross-section greater than the particle volume.  Transitioning this potential to applications however requires integrated development of cost-effective, scalable, and sustainable synthesis methods for high precision products, generalizable functionalization strategies that ensure colloidal stability, and high-rate processing that provides spatially ordered arrays with macroscopic alignment.  Through a refined understanding of the growth mechanism, we will discuss innovative synthetic strategy of 100-fold, non-volumetric, scale-up of AuNRs that preserves independent control of volume, length and aspect ratio, and provides high quantity products (&gt; grams) with higher-order multipole resonances and absorption/scattering cross-sections approaching theoretical limits.  Polarity inversion of the ligand layer via precise control of surfactant concentration enables phase transfer to organic solvents and facilitates the ligand exchange resulting in significantly increased grafting density of polymer grafted nanorods and the formation of C-Au linkages that substantially enhances interface stability.  100+ nM solutions of the later affords rapid (~10s), large area (&gt;cm<sup>2</sup>), blade coating of ordered monolayer films, whose optical response is tuned by processing conditions and polymer graft molecular weight.  Post-processing, such as by laser reshaping, results in voxelated films from a single feedstock.  Continual understanding of synthetic and assembly mechanisms is crucial to using such integrated platform technologies for the manufacturing of compact sensors, optical modulators and specialty coatings.

From the beaker to an engineering platform: Scale-up, functionalization, and assembly of plasmonic nanoparticles

2019 Spring National Meeting

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.