Combined NC-AFM and DFT study of the adsorption geometry of trimesic acid on rutile TiO2(110)

Greuling A, Rahe P, Kaczmarski M, Kühnle A, Rohlfing M (2010)
Journal of Physics : Condensed Matter 22(34): 345008.

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The adsorption behavior of trimesic acid (TMA) on rutile TiO2(110) is studied by means of non-contact atomic force microscopy (NC-AFM) and density-functional theory (DFT). Upon low-coverage adsorption at room temperature, NC-AFM imaging reveals individual molecules, centered above the surface titanium rows. Based on the NC-AFM results alone it is difficult to deduce whether the molecules are lying flat or standing upright on the surface. To elucidate the detailed adsorption geometry, we perform DFT calculations, considering a large number of different adsorption positions. Our DFT calculations suggest that single TMA molecules adsorb with the benzene ring parallel to the surface plane. In this configuration, two carboxylic groups can anchor to the surface in a bidentate fashion with the oxygen atoms binding to surface titanium atoms while the hydrogen atoms approach oxygen atoms within the bridging oxygen rows. The most favorable adsorption position is obtained in the presence of a hydroxyl defect, allowing for additional binding of the third carboxylic group.
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Zeitschriftentitel
Journal of Physics : Condensed Matter
Band
22
Ausgabe
34
Seite(n)
345008
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Greuling A, Rahe P, Kaczmarski M, Kühnle A, Rohlfing M. Combined NC-AFM and DFT study of the adsorption geometry of trimesic acid on rutile TiO2(110). Journal of Physics : Condensed Matter. 2010;22(34):345008.
Greuling, A., Rahe, P., Kaczmarski, M., Kühnle, A., & Rohlfing, M. (2010). Combined NC-AFM and DFT study of the adsorption geometry of trimesic acid on rutile TiO2(110). Journal of Physics : Condensed Matter, 22(34), 345008. doi:10.1088/0953-8984/22/34/345008
Greuling, A., Rahe, P., Kaczmarski, M., Kühnle, A., and Rohlfing, M. (2010). Combined NC-AFM and DFT study of the adsorption geometry of trimesic acid on rutile TiO2(110). Journal of Physics : Condensed Matter 22, 345008.
Greuling, A., et al., 2010. Combined NC-AFM and DFT study of the adsorption geometry of trimesic acid on rutile TiO2(110). Journal of Physics : Condensed Matter, 22(34), p 345008.
A. Greuling, et al., “Combined NC-AFM and DFT study of the adsorption geometry of trimesic acid on rutile TiO2(110)”, Journal of Physics : Condensed Matter, vol. 22, 2010, pp. 345008.
Greuling, A., Rahe, P., Kaczmarski, M., Kühnle, A., Rohlfing, M.: Combined NC-AFM and DFT study of the adsorption geometry of trimesic acid on rutile TiO2(110). Journal of Physics : Condensed Matter. 22, 345008 (2010).
Greuling, Andreas, Rahe, Philipp, Kaczmarski, Marcin, Kühnle, Angelika, and Rohlfing, Michael. “Combined NC-AFM and DFT study of the adsorption geometry of trimesic acid on rutile TiO2(110)”. Journal of Physics : Condensed Matter 22.34 (2010): 345008.
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PMID: 26342363

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