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Meeting 2021 TMS Annual Meeting & Exhibition
Symposium Plasmonics in Nanocomposite Materials
Presentation Title Spectral Enhancement of Dye Molecules Adsorbed on Titania Prepared on Gold Nanoparticles
Author(s) Hiromasa Nishikiori, Yosuke Kageshima, Katsuya Teshima
On-Site Speaker (Planned) Hiromasa Nishikiori
Abstract Scope Fluorescein adsorbed on TiO<sub>2</sub>/Au/Si showed obvious IR peaks, whereas the IR absorption of the dye adsorbed on the titania film without Au was quite weak. The amount of the adsorbed dye was also assessed by UV-vis absorption spectrum of the dye dissolved into acidic aqueous solution. Since the adsorption amount of the dye on the titania was independent of the Au existence, the increased IR absorption of fluorescein/TiO<sub>2</sub>/Au/Si should originate from the surface plasmon resonance of Au. The enhanced IR absorption was preferable to monitor the slight change in the electric charge on the titania surface. A peak for the asymmetric COO<sup>-</sup> stretch was located at a lower wavenumber for the titania films UV-irradiated for a longer time such that the monoanion and dianion species exhibit peaks at 1584 and 1573 cm<sup>-1</sup>, respectively. The relative amount of the dianion clearly increased by the UV irradiation due to the surface change.
Proceedings Inclusion? Planned:


Anisotropic and Shape-selective Plasmonic Nanomaterials: Structure-property Relationships
Electron Transfer and Catalysis in Plasmonic Nanocomposite Systems
Emerging Anisotropic 2D Layered Materials for Plasmonics and Polaritonics
Engineered Plasmonic Nanoparticle Based Detection: Advanced Sensitivity and Selectivity
Fin p-n Heterojunctions for High Brightness Light Emitting Diodes and Lasers at Sub-micron Scale
Gold and Au/Ni and Other Plasmonic Nanoparticles: Using Theory to Understand Metal Recovery and Optical Properties
Nanophotonics for Neural Engineering
Nanoplasmonics and Its Applications in Nanomedicine
Plasmonic Compound Nanohole Arrays
Spectral Enhancement of Dye Molecules Adsorbed on Titania Prepared on Gold Nanoparticles
Understanding Photocarrier and Gas Dynamics to Rationally Design Nano-heterostructured Photocatalysts for CO2 Conversion

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