Unraveling the Atomic Structure of Fe Intercalated under Graphene on Ir(111): A Multitechnique Approach

Autor(es)

de Campos Ferreira, Rodrigo Cezar ^[1] ; de Lima, Luis Henrique ^[2] ; Barreto, Lucas ^[2] ; Silva, Caio C. ^[1] ; Landers, Richard ^[1] ; de Siervo, Abner ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083859 Campinas, SP - Brazil

^[2] Univ Fed ABC, Ctr Ciencias Nat & Humanas, BR-09210580 Santo Andre, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: CHEMISTRY OF MATERIALS; v. 30, n. 20, p. 7201-7210, OCT 23 2018.
• Citações Web of Science: 1

Resumo

The interaction of Fe deposited on graphene grown on Ir(111) was studied in detail to better understand the growth, intercalation, and oxidation of Fe ultrathin films on and under graphene. The study has combined a multiple technique approach that allows extracting at once the chemical, topographic, and precise atomic structure of the system submitted to different conditions of growth and atmospheric environment. For instance, scanning tunneling microscopy (STM) measurements allowed us to follow the formation of Fe nanostructures during Fe deposition and intercalation. Synchrotron-based high-resolution X-ray photoelectron spectroscopy (HR-XPS) untangled the different chemical environments for C-Fe bonds. We have also used photoelectron diffraction experiments to site-specifically unravel the atomic structure of the intercalated Fe under graphene. Oxidation experiments were also performed for samples prepared under different conditions which revealed that indeed one can set the sample temperature to selectively protect or oxidize the intercalated/supported materials, which open interesting possibilities to engineer complex metal-oxide graphene-based devices. (AU)

• Processo FAPESP: 07/54829-5 - Estrutura eletrônica e geométrica de nano materiais: um estudo por radiação sincroton
• Beneficiário: Richard Landers
• Linha de fomento: Auxílio à Pesquisa - Temático
• Processo FAPESP: 07/08244-5 - Estudo das propriedades magnéticas de filmes ultrafinos e nanopartículas de Pd e PdAu via XMCD
• Beneficiário: Abner de Siervo
• Linha de fomento: Auxílio à Pesquisa - Regular
• Processo FAPESP: 16/21402-8 - Crescimento e caracterização de heteroestruturas bidimensionais: dicalcogenetos de metais de transição sobre grafeno e nitreto de boro hexagonal
• Beneficiário: Luis Henrique de Lima
• Linha de fomento: Bolsas no Brasil - Pós-Doutorado