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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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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]
Total Authors: 7
[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
Total Affiliations: 3
Document type: Journal article
Source: Physical Chemistry Chemical Physics; v. 17, n. 28, p. 18344-18352, 2015.
Web of Science Citations: 5

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)

FAPESP's process: 11/12566-3 - Electronic and Structural Characterization of Pt monolayers deposited on Au vicinal surfaces
Grantee:Mauricio Javier Prieto
Support Opportunities: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 13/04855-0 - Study of self-assembly of terpyridyl molecules on metallic surfaces
Grantee:Shadi Passam Fatayer
Support Opportunities: Scholarships abroad - Research Internship - Master's degree
FAPESP's process: 14/10294-4 - Multiscale computational modeling of the microstructural evolution and plasticity in metallic alloys
Grantee:Roberto Gomes de Aguiar Veiga
Support Opportunities: Research Grants - Young Investigators Grants
FAPESP's process: 11/19564-6 - Computer simulations of the microstructural evolution of Fe-Ni-C alloys
Grantee:Roberto Gomes de Aguiar Veiga
Support Opportunities: Scholarships in Brazil - Post-Doctorate