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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Surface structure characterization of ultra-thin films of Au deposited on Pd(111)

Texto completo
Autor(es):
Pancotti, A. [1] ; de Siervo, A. [2] ; Nascente, P. A. P. [3] ; Landers, R. [2]
Número total de Autores: 4
Afiliação do(s) autor(es):
[1] Univ Fed Goias, Dept Fis, Reg Jatai, BR-75801615 Jatai, Go - Brazil
[2] Univ Estadual Campinas, Inst Fis Gleb Wataghin, Dept Fis Aplicada, BR-13083859 Campinas, SP - Brazil
[3] Univ Fed Sao Carlos, Dept Engn Mat, BR-13565905 Sao Carlos, SP - Brazil
Número total de Afiliações: 3
Tipo de documento: Artigo Científico
Fonte: Surface Science; v. 648, n. SI, p. 250-255, JUN 2016.
Citações Web of Science: 1
Resumo

Ultra-thin films of Au were deposited on the Pd(111) surface and then characterized by X-ray photoelectron spectroscopy (XPS), low-energy electron diffraction (LEED), and X-ray photoelectron diffraction (XPD) generated by synchrotron radiation. The Au films were deposited at room temperature (300 K) and subsequently annealed at 400 degrees C (673 K) and 610 degrees C (883 K). XPD analyses indicated that the gold films were 7 and 6 ML thick, for the annealing temperatures of 400 degrees C and 610 degrees C, respectively. The film interlayer distances exhibited an oscillatory behavior, with a 5% contraction between the top and the second layers, a 3% expansion between the second and the third layers, for the film annealed at 400 degrees C, and a 2% expansion in the interlayer distance between the top and the second layers and a 4% contraction between the second and the third layers, for the film annealed at 610 degrees C For both annealing temperatures, the interlayer distances between the third and the fourth layers and between the fourth and the fifth layers exhibited a 1% expansion and a 2% contraction. For the film annealed at 610 degrees C, XPD results revealed that the Pd(111) surface was covered by Au islands, with some bare patches exposed. (C) 2015 Elsevier B.V. All rights reserved. (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