Presentation Information
[7p-N203-2][JSAP-Optica Joint Symposia Invited Talk] Multiscale Manipulation of Gold Nanocubes: Bridging Colloid Science and Nanophotonics for Tailored Optical Properties
〇Jeong-Eun Park1 (1.Gwangju Institute of Science and Technology)
Keywords:
gold nanocube,high yield,polariton
At the intersection of colloid science and nanophotonics is the potential to unlock fundamental interfacial phenomena for developing advanced materials with unique optical properties. This presentation introduces how strategic manipulation of surface chemistry and assembly dynamics enables advancements in gold nanocube systems across multiple scales. A centrifugal depletion-induced flocculation method achieves exceptional purification of gold nanocubes, with recovery efficiencies exceeding 98% and yields of 98-99% for 60 nm particles, while maintaining high monodispersity, effectively addressing a core challenge in colloidal synthesis. These high-quality gold nanocubes enable the investigation of strong coupling phenomena between plasmonic nanocubes and J-aggregates, where smaller nanocubes demonstrate enhanced coupling strengths further improved by approximately 21% through a layer-by-layer coating technique. This technique overcomes surface area limitations and creates exciton-polaritons for quantum applications. When applied to two-dimensional arrangements, template-assisted self-assembly creates large-area nanoparticle lattices that support high-quality surface lattice resonances. The anisotropic shape and sharp edges of these nanocubes offer additional tunability in plasmonic responses compared to conventional spherical particles. By strategically manipulating interfacial interactions and structural organization, this study highlights the transformative potential of colloid science in crafting advanced nanophotonic materials with tailored properties.