Ultrafast Dynamics of Plasmon-Mediated Charge Transfer in Ag@CeO2 Studied by Free Electron Laser Time-Resolved X‑ray Absorption Spectroscopy

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
Hauptverfasser: 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
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Sprache:eng
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Zusammenfassung: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 (
ISSN:1530-6984
1530-6992
DOI:10.1021/acs.nanolett.0c04547