Plasmon‐Enhanced Photoluminescence and Photocatalysis Reactions in Metal‐Semiconductor Nanomaterials: UV‐Generated Hot Electron in Gold‐Zinc Oxide
| Autor: | Suzanna Akil, Jean-Jacques Gaumet, Issraa Shahine, Nour Beydoun, Safi Jradi |
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| Rok vydání: | 2019 |
| Předmět: |
Photoluminescence
Nanostructure Materials science business.industry Organic Chemistry Nanoparticle 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Photochemistry 01 natural sciences 7. Clean energy 0104 chemical sciences Analytical Chemistry Nanomaterials Semiconductor Photocatalysis Physical and Theoretical Chemistry 0210 nano-technology business Luminescence Plasmon |
| Zdroj: | ChemPhotoChem. 4:181-194 |
| ISSN: | 2367-0932 |
| DOI: | 10.1002/cptc.201900252 |
| Popis: | Here, we introduce a mechanistic study to design the hybrid junction in metallic‐semiconductor (M/SC) nanostructures. UV light induced hot electrons generation in ZnO nanostructures is precisely tuned the photoluminescence (PL) and photocatalytic (PC) properties in hybrid Au/ZnO nanomaterials. Both, enhancement and quenching of the PL and PC functionalities are obtained, depending on the Au nanoparticles (AuNPs) characteristics and Au/ZnO molecular distance. Basically, under UV irradiation free‐ligand AuNPs quench the luminescence of ZnONPs through direct charge transfer (CT) from ZnO into AuNPs. Whereas, capped AuNPs enhance the ZnO emission through the indirect CT from AuNPs into ZnO ones facilitated by the distance created by the CTAB ligand between both constituents of the hybrid systems. An optimal Au/ZnO molecular distance is suitable to enhance both the plasmonic photocatalysis reaction and photoelectric properties of M/SC nanostructures. This phenomena is mediated by the energy transfer (ET) from ZnONPs into AuNPs. The resulting PL enhancement is described by the plasmon induced resonance energy transfer effect (PIRET effect). |
| Databáze: | OpenAIRE |
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