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Raman Spectroscopy of Lattice-Matched Graphene on Strongly Interacting Metal Surfacesстатья
Статья опубликована в высокорейтинговом журнале
Статья опубликована в журнале из списка Web of Science и/или Scopus- Авторы: Usachov Dmitry Yu, Davydov Valery Yu, Levitskii Vladimir S., Shevelev Viktor O., Dmitry Marchenko, Senkovskiy Boris V., Vilkov Oleg Yu, Rybkin Artem G., Yashina Lada V., Chulkov Evgueni V., Sklyadneva Irina Yu, Rolf Heid, Klaus-Peter Bohnen, Clemens Laubschat, Vyalikh Denis V.
- Журнал: ACS Nano
- Год издания: 2017
- Издательство: American Chemical Society
- Местоположение издательства: United States
- DOI: 10.1021/acsnano.7b02686
- Аннотация: Regardless of the widely accepted opinion that there is no Raman signal from single-layer graphene when it is strongly bonded to a metal surface, we present Raman spectra of a graphene monolayer on Ni(111) and Co(0001) substrates. The high binding energy of carbon to these surfaces allows formation of lattice-matched (1 × 1) structures where graphene is significantly stretched. This is reflected in a record-breaking shift of the Raman G band by more than 100 cm–1 relative to the case of freestanding graphene. Using electron diffraction and photoemission spectroscopy, we explore the aforementioned systems together with polycrystalline graphene on Co and analyze possible intercalation of oxygen at ambient conditions. The results obtained are fully supported by Raman spectroscopy. Performing a theoretical investigation of the phonon dispersions of freestanding graphene and stretched graphene on the strongly interacting Co surface, we explain the main features of the Raman spectra. Our results create a reliable platform for application of Raman spectroscopy in diagnostics of chemisorbed graphene and related materials.
- Добавил в систему: Яшина Лада Валерьевна