About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Surface Engineering VIII
|
| Presentation Title |
Synergistic Plasmonic and Photocatalytic Effects in Multilayer Ag–Au/TiO2 Hyperbolic Metamaterials for High-Performance PIERS Application |
| Author(s) |
Muhammad Shafi |
| On-Site Speaker (Planned) |
Muhammad Shafi |
| Abstract Scope |
Photoinduced enhanced Raman spectroscopy (PIERS) enables ultrasensitive analyte detection. In this study, we present a novel recyclable PIERS substrate comprising uniformly distributed silver nanoparticles (AgNPs) deposited on a hyperbolic metamaterial (HMM) multilayer structure. This hybrid structure enhances both electromagnetic and chemical mechanisms: AgNP nanogaps excite plasmon polaritons at the Au/TiO2 interface, while UV-activated TiO2 promotes efficient charge transfer. The result is a 47-fold enhancement over conventional SERS, among the highest reported. The substrate also shows excellent photocatalytic degradation, remaining effective after 16-18 reuse cycles. Enhanced sensitivity arises from increased electron density on AgNPs and prolonged charge carrier lifetimes, enabling activation under very low photon energy. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Composites, Thin Films and Interfaces, Surface Modification and Coatings |