|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||2018 Symposium on Functional Nanomaterials: Discovery and Integration of Nanomaterials
||Optimization of Gold Surface Density on SiO2@Au Core-Shell Nanoparticles for Holographic Fabrication of Ordered Arrays for Plasmonic Metamaterials
||Kyle Iwamoto, Prakash D. Nallathamby, Eveline Rigo, Gregory L. Timp, Ryan K. Roeder
|On-Site Speaker (Planned)
The localized surface plasmon resonance (LSPR) of Au nanoparticles (NPs) enables applications in optical imaging, photothermal therapeutics, and catalysis. The LSPR of Au can also be tuned by altering the thickness of Au nanoshells. The purpose of this study was to prepare SiO<SUB>2</SUB>@Au core-shell NPs with with a tunable surface density of Au for use in catalysis and holographically-assembled, ordered photonic arrays. Core-shell NPs were prepared with SiO<SUB>2</SUB> cores ~500 nm in diameter and a discontinuous Au shell <5 nm in thickness, which exhibited a surface density ranging from 17 to 58% by area as characterized by electron microscopy. An increased Au surface density resulted in a red-shifted LSPR and increased catalytic efficacy for the conversion of methylene blue to leuco methylene blue. The tunable Au surface density was able to control the large polarizability for optical trapping of Au NPs, while still maintaining the LSPR for photonic properties.
||Planned: Supplemental Proceedings volume