Abstract
A major challenge in nanoparticle self-assembly is programming the large-area organization of a single type of anisotropic nanoparticle into distinct superlattices with tunable packing efficiencies. In this talk, I will discuss how nanoscale surface chemistry is used to direct the self-assembly of shape-controlled silver nanoparticles into three distinct twodimensional plasmonic superlattices at a liquid/liquid interface. Systematically tuning the surface chemistry of the silver nanoparticles leads to a continuous superlattice structural evolution, from close-packed to progressively open structures. Notably, silver octahedra standing on vertices arranged in a square lattice is observed using hydrophobic particles. The structure-to-function characterization reveals that the nanoparticle assembly with the least packing density generates plasmonic ‘hotstrips’, leading to nearly 10-fold more efficient surface-enhanced Raman scattering compared with the other more densely packed configurations.
| Original language | English |
|---|---|
| Pages (from-to) | 129 |
| Number of pages | 1 |
| Journal | International Conference on Metamaterials, Photonic Crystals and Plasmonics |
| Publication status | Published - 2019 |
| Externally published | Yes |
| Event | 10th International Conference on Metamaterials, Photonic Crystals and Plasmonics, META 2019 - Lisbon, Portugal Duration: Jul 23 2019 → Jul 26 2019 |
Bibliographical note
Publisher Copyright:© 2019, META Conference. All rights reserved.
ASJC Scopus Subject Areas
- Electrical and Electronic Engineering
- Materials Science (miscellaneous)
- Electronic, Optical and Magnetic Materials
- Materials Chemistry