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dc.contributor.authorSu, Zixue
dc.contributor.authorBaskin, J. Spencer
dc.contributor.authorZhou, Wuzong
dc.contributor.authorThomas, John
dc.contributor.authorZewail, Ahmed
dc.identifier.citationSu , Z , Baskin , J S , Zhou , W , Thomas , J & Zewail , A 2017 , ' Ultrafast elemental and oxidation-state mapping of hematite by 4D electron microscopy ' , Journal of the American Chemical Society , vol. 139 , no. 13 , pp. 4916-4922 .
dc.identifier.otherPURE: 249338511
dc.identifier.otherPURE UUID: 26e65d39-586b-48ab-a97b-14c66a32383b
dc.identifier.otherScopus: 85017153103
dc.identifier.otherORCID: /0000-0001-9752-7076/work/58055002
dc.identifier.otherWOS: 000398764000046
dc.descriptionThis work was supported by the Air Force Office of Scientific Research (FA9550-11-1-0055) in the Gordon and Betty Moore Center for Physical Biology at the California Institute of Technology.en
dc.description.abstractWe describe a new methodology that sheds light on the fundamental electronic processes that occur at the subsurface regions of inorganic solid photocatalysts. Three distinct kinds of microscopic imaging are used that yield spatial, temporal and energy-resolved information. We also carefully consider the effect of photon-induced near-field electron microscopy (PINEM), first reported by Zewail et al. in 2009. The value of this methodology is illustrated by studying afresh a popular and viable photocatalyst, hematite, α-Fe2O3, that exhibits most of the properties required in a practical application. By employing high-energy electron-loss signals (of several hundred eV), coupled to femtosecond temporal resolution as well as ultrafast energy-filtered transmission electron microscopy in 4D, we have, inter alia, identified Fe4+ ions that have a lifetime of a few picoseconds, as well as associated photoinduced electronic transitions and charge transfer processes.
dc.relation.ispartofJournal of the American Chemical Societyen
dc.rightsCopyright © 2017 American Chemical Society. This work has been made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at:
dc.subjectQD Chemistryen
dc.titleUltrafast elemental and oxidation-state mapping of hematite by 4D electron microscopyen
dc.typeJournal articleen
dc.contributor.institutionUniversity of St Andrews.School of Chemistryen
dc.contributor.institutionUniversity of St Andrews.EaSTCHEMen
dc.description.statusPeer revieweden

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