|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||Metal-Matrix Composites: Advances in Analysis, Measurement and Observations
||Iron Oxide - Gold Composite Nanoparticles and Nanogap Junctions for Sensing Applications Using Surface Enhanced Raman Scattering
||Simona E. Hunyadi Murph, Emily Searles
|On-Site Speaker (Planned)
||Simona E. Hunyadi Murph
Multifunctional iron oxide-gold composite nanostructures with tailored “hot spot” nano-gap junctions have been produced via a multi-seed-mediated approach and investigated for analyte detection. The resulting nano-composite material retain the properties of both individual components: (a) magnetic properties attributed to the iron oxide nanoparticles, and (b) plasmonic nanostructures ascribed to the gold nanospheres. The tunable nanogap “hot spot” junctions were evaluated for surface-enhanced Raman scattering (SERS) enhancement studies for a model reporter analyte, 4-mercaptophenol. Surface enhanced Raman scattering studies shows a three times enhancement effect for composite gold-iron oxide nanoparticles when compared with gold nanostructures. These enhancements are attributed to the presence of the “hot spot” junctions and nanogaps obtained from both: (a) multi-seed mediated approach that generates larger decoration of iron oxide with plasmonic nanoparticles and (b) aggregated assemblies formed due to the key magnetic iron oxide nanostructures.