Self-assembly of NiTPP on Cu(111): a transition from disordered 1D wires to 2D chiral domains

Autor(es)

Fatayer, Shadi ^[1] ; Veiga, Roberto G. A. ^[2] ; Prieto, Mauricio J. ^[1] ; Perim, Eric ^[1] ; Landers, Richard ^[1] ; Miwa, Roberto H. ^[3] ; de Siervo, Abner ^[1]

Afiliação do(s) autor(es)

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

^[2] Univ Sao Paulo, Escola Politecn, Dept Met & Mat Engn, BR-05508010 Sao Paulo, SP - Brazil

^[3] Univ Fed Uberlandia, Dept Fis, BR-38400902 Uberlandia, MG - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Physical Chemistry Chemical Physics; v. 17, n. 28, p. 18344-18352, 2015.
• Citações Web of Science: 5

Resumo

The growth and self-assembling properties of nickel-tetraphenyl porphyrins (NiTPP) on the Cu(111) surface are analysed via scanning tunnelling microscopy (STM), X-ray photoelectron spectroscopy (XPS) and density functional theory (DFT). For low coverage, STM results show that NiTPP molecules diffuse on the terrace until they reach the step edge of the copper surface forming a 1D system with disordered orientation along the step edges. The nucleation process into a 2D superstructure was observed to occur via the interaction of molecules attached to the already nucleated 1D structure, reorienting molecules. For monolayer range coverage a 2D nearly squared self-assembled array with the emergence of chiral domains was observed. The XPS results of the Ni 2p(3/2) core levels exhibit a 2.6 eV chemical shift between the mono-and multilayer configuration of NiTPP. DFT calculations show that the observed chemical shifts of Ni 2p(3/2) occur due to the interaction of 3d orbitals of Ni with the Cu(111) substrate. (AU)

• Processo FAPESP: 11/19564-6 - Modelagem computacional da evolução microestrutural de ligas Fe-Ni-C
• Beneficiário: Roberto Gomes de Aguiar Veiga
• Linha de fomento: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 13/04855-0 - Estudo da auto-organização de moléculas de terpiridina em superfícies metálicas
• Beneficiário: Shadi Passam Fatayer
• Linha de fomento: Bolsas no Exterior - Estágio de Pesquisa - Mestrado
• Processo FAPESP: 14/10294-4 - Modelagem computacional multiescala da evolução microestrutural e da plasticidade em ligas metálicas
• Beneficiário: Roberto Gomes de Aguiar Veiga
• Linha de fomento: Auxílio à Pesquisa - Apoio a Jovens Pesquisadores
• Processo FAPESP: 11/12566-3 - Caracterização eletrônica e estrutural de monocamadas de Pt depositadas em superfícies vicinais de AU
• Beneficiário: Mauricio Javier Prieto
• Linha de fomento: Bolsas no Brasil - Pós-Doutorado