Enhanced Bonding of Silver Nanoparticles on Oxidized TiO2(110)
| Autor: | Jian-guo Wang, Patrick Galliker, Jonas Ø. Hansen, Zhongshan Li, Phillip Sprunger, E. Lægsgaard, Bjørk Hammer, Flemming Besenbacher, Stefan Wendt, Estephania Lira |
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| Rok vydání: | 2010 |
| Předmět: |
Materials science
SCANNING-TUNNELING-MICROSCOPY Nucleation Nanotechnology Photochemistry Silver nanoparticle Surfaces Coatings and Films Electronic Optical and Magnetic Materials Nanoclusters law.invention chemistry.chemical_compound General Energy Monomer Adsorption chemistry X-ray photoelectron spectroscopy law Density functional theory Physical and Theoretical Chemistry Scanning tunneling microscope |
| Zdroj: | Hansen, J Ø, Salazar, E L, Galliker, P, Wang, J, Sprunger, P T, Li, Z, Lægsgaard, E, Wendt, S, Hammer, B & Besenbacher, F 2010, ' Enhanced Bonding of Silver Nanoparticles on Oxidized TiO2(110) ', Journal of Physical Chemistry C, vol. 114, no. 40, pp. 16964-16972 . https://doi.org/10.1021/jp101714r |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/jp101714r |
| Popis: | The nucleation and growth of silver nanoclusters on TiO2(110) surfaces with on-top O adatoms (oxidized TiO2), surface O vacancies and H adatoms (reduced TiO2) have been studied. From the interplay of scanning tunneling microscopy/photoelectron spectroscopy experiments and density functional theory calculations, it is found that silver clusters are much more strongly bonded to oxidized TiO2(110) surfaces than to reduced TiO2(110) model supports. It is shown that electronic charge can be transferred from silver clusters to the oxidized TiO2(110) surface, as evidenced by the reappearance of the Ti3d defect state upon silver exposure. Furthermore, from both scanning tunneling microscopy data and density functional theory calculations the most favorable adsorption site of silver monomers on oxidized TiO2(110) is one that bridges between on-top O adatoms and regular surface O atoms nearby. |
| Databáze: | OpenAIRE |
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