Synthesis of TiO2 Nanoparticles on the Au(111) Surface

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The growth of titanium oxide nanoparticles on reconstructed Au(111) surfaces was investigated by scanning tunneling microscopy and X-ray photoelectron spectroscopy. Ti was deposited by physical vapor deposition at 300 K. Regular arrays of titanium nanoparticles form by preferential nucleation of Ti at the elbow sites of the herringbone reconstruction. Titanium oxide clusters were synthesized by subsequent exposure to O{sub 2} at 300 K. Two- and three-dimensional titanium oxide nanocrystallites form during annealing in the temperature range from 600 to 900 K. At the same time, the Au(111) surface assumes a serrated, <110> oriented step-edge morphology, suggesting step-edge pinning by titanium ... continued below

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Biener, J; Farfan-Arribas, E; Biener, M M; Friend, C M & Madix, R J January 11, 2005.

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The growth of titanium oxide nanoparticles on reconstructed Au(111) surfaces was investigated by scanning tunneling microscopy and X-ray photoelectron spectroscopy. Ti was deposited by physical vapor deposition at 300 K. Regular arrays of titanium nanoparticles form by preferential nucleation of Ti at the elbow sites of the herringbone reconstruction. Titanium oxide clusters were synthesized by subsequent exposure to O{sub 2} at 300 K. Two- and three-dimensional titanium oxide nanocrystallites form during annealing in the temperature range from 600 to 900 K. At the same time, the Au(111) surface assumes a serrated, <110> oriented step-edge morphology, suggesting step-edge pinning by titanium oxide nanoparticles. The oxidation state of these titanium oxide nanoparticles varies with annealing temperature. Specifically, annealing to 900 K results in the formation of stoichiometric TiO{sub 2} nanocrystals as judged by the observed XPS binding energies. Nano-dispersed TiO{sub 2} on Au(111) is an ideal system to test the various models explaining the enhanced catalytic reactivity of supported Au nanoparticles.

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PDF-file: 16 pages; size: 0.7 Mbytes

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  • Journal Name: Surface Science; Journal Volume: 590; Journal Issue: 2-3

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  • Report No.: UCRL-JRNL-208963
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 859915
  • Archival Resource Key: ark:/67531/metadc783313

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • January 11, 2005

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  • Dec. 3, 2015, 9:30 a.m.

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  • Dec. 8, 2016, 11:22 p.m.

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Biener, J; Farfan-Arribas, E; Biener, M M; Friend, C M & Madix, R J. Synthesis of TiO2 Nanoparticles on the Au(111) Surface, article, January 11, 2005; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc783313/: accessed October 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.