Ultrafast Dynamics of Plasmon-Mediated Charge Transfer in Ag@CeO2 Studied by Free Electron Laser Time-Resolved X‑ray Absorption Spectroscopy
Expanding the activity of wide bandgap semiconductors from the UV into the visible range has become a central goal for their application in green solar photocatalysis. The hybrid plasmonic/semiconductor system, based on silver nanoparticles (Ag NPs) embedded in a film of CeO2, is an example of a fun...
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| Veröffentlicht in: | Nano letters 2021-02, Vol.21 (4), p.1729-1734 |
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| creator | Pelli Cresi, Jacopo Stefano Principi, Emiliano Spurio, Eleonora Catone, Daniele O’Keeffe, Patrick Turchini, Stefano Benedetti, Stefania Vikatakavi, Avinash D’Addato, Sergio Mincigrucci, Riccardo Foglia, Laura Kurdi, Gabor Nikolov, Ivaylo P De Ninno, Giovanni Masciovecchio, Claudio Nannarone, Stefano Kopula Kesavan, Jagadesh Boscherini, Federico Luches, Paola |
| description | Expanding the activity of wide bandgap semiconductors from the UV into the visible range has become a central goal for their application in green solar photocatalysis. The hybrid plasmonic/semiconductor system, based on silver nanoparticles (Ag NPs) embedded in a film of CeO2, is an example of a functional material developed with this aim. In this work, we take advantage of the chemical sensitivity of free electron laser (FEL) time-resolved soft X-ray absorption spectroscopy (TRXAS) to investigate the electron transfer process from the Ag NPs to the CeO2 film generated by the NPs plasmonic resonance photoexcitation. Ultrafast changes ( |
| doi_str_mv | 10.1021/acs.nanolett.0c04547 |
| format | Article |
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The hybrid plasmonic/semiconductor system, based on silver nanoparticles (Ag NPs) embedded in a film of CeO2, is an example of a functional material developed with this aim. In this work, we take advantage of the chemical sensitivity of free electron laser (FEL) time-resolved soft X-ray absorption spectroscopy (TRXAS) to investigate the electron transfer process from the Ag NPs to the CeO2 film generated by the NPs plasmonic resonance photoexcitation. Ultrafast changes (<200 fs) of the Ce N4,5 absorption edge allowed us to conclude that the excited Ag NPs transfer electrons to the Ce atoms of the CeO2 film through a highly efficient electron-based mechanism. 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| subjects | Letter |
| title | Ultrafast Dynamics of Plasmon-Mediated Charge Transfer in Ag@CeO2 Studied by Free Electron Laser Time-Resolved X‑ray Absorption Spectroscopy |
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