Abstract
The interaction of ammonia molecules with the surface of ytterbium nanofilms of uniform thickness grown on a Si(111) 7 × 7 substrate and forming a chemically sharp interface with it has been investigated. It has been found that this interaction depends significantly on the thickness of nanofilms. For a film thickness equal to 5 monoatomic layers, chemisorption of ammonia has an essentially nondissociative character and the molecules form a donor-acceptor bond with ytterbium; as a result, the metal transforms from the divalent state into a new nonautonomous trivalent state. For other film thicknesses, the adsorbed molecules dissociate, nitrogen atoms diffuse into the bulk of the film and enter into the reaction with silicon, and ytterbium remains in the initial divalent state. It has been shown that the character of the interaction of ammonia molecules with ytterbium nanofilms and the stability of the NH3-Yb-Si(111) structures are determined by the standing waves of electron density (Friedel oscillations) generated by the interface between the metal and silicon substrate.
Similar content being viewed by others
References
A. M. Shikin, Formation, Electronic Structure, and Properties of Low-Dimensional Structures Based on Metals (VVM, St. Petersburg, 2011) [in Russian].
G. Cao and Y. Wang, Nanostructures and Nanomaterials: Synthesis, Properties, and Applications (World Scientific, Singapore, 2011), Vol. 2.
J.-W. He, W. K. Kuhn, L.-W. Leung, and D. W. Goodman, J. Chem. Phys. Chem. 93, 7463 (1990).
J.-W. He, C. A. Estrada, J. S. Corneille, and M.-Ch. Wu, Surf. Sci. 261, 164 (1992).
M. Rauh, B. Heping, and P. Wissmann, Appl. Phys. A: Mater. Sci. Process. 61, 587 (1995).
B. Hammer, Y. Morikawa, and J. K. Nørskov, Phys. Rev. Lett. 76, 2141 (1996).
P. Jakob and A. Schlapka, Surf. Sci. 601, 1556 (2007).
F. Voigts, F. Bebensee, S. Dahle, K. Volgmann, and W. Maus-Friedrichs, Surf. Sci. 603, 40 (2009).
N. Schumacher, K. Andersson, L. C. Grabow, M. Mavrikakis, J. Nerlov, and I. Chorkendorff, Surf. Sci. 602, 702 (2008).
F. Bebensee, F. Foigts, and W. Maus-Friedrichs, Surf. Sci. 602, 1622 (2008).
M. V. Kuz’min, M. V. Loginov, and M. A. Mittsev, Phys. Solid State 51(4), 841 (2009).
M. V. Kuz’min and M. A. Mittsev, Phys. Solid State 52(3), 625 (2010).
M. V. Kuz’min and M. A. Mittsev, Phys. Solid State 52(6), 1279 (2010).
M. V. Kuz’min and M. A. Mittsev, Phys. Solid State 53(6), 1292 (2011).
D. V. Buturovich, M. V. Kuz’min, and M. A. Mittsev, Tech. Phys. Lett. 38(11), 969 (2012).
M. V. Kuz’min and M. A. Mittsev, Phys. Solid State 54(10), 2117 (2012).
M. V. Kuz’min and M. A. Mittsev, Phys. Solid State 56(7), 1449 (2014).
D. V. Buturovich, M. V. Kuz’min, M. V. Loginov, and M. A. Mittsev, Phys. Solid State 50(1), 173 (2008).
D. V. Buturovich, M. V. Kuz’min, M. V. Loginov, and M. A. Mittsev, Phys. Solid State 48(11), 2205 (2006).
T. V. Krachino, M. V. Kuz’min, M. V. Loginov, and M. A. Mittsev, Phys. Solid State 39(2), 224 (1997).
M. V. Kuz’min and M. A. Mittsev, Phys. Solid State 53(3), 612 (2011).
M. V. Kuz’min, M. V. Loginov, and M. A. Mittsev, Phys. Solid State 50(2), 369 (2008).
H. B. Gray, Electrons and Chemical Bonding (W. A. Benjamin, New York, 1964; Mir, Moscow, 1967).
L. V. Gurvich, G. V. Karachentsev, V. N. Kondrat’ev, Yu. A. Lebedev, V. A. Medvedev, V. K. Potapov, and Yu. S. Khodeev, Energies of Breaking of Chemical Bonds, Ionization Potentials, and Electron Affinity (Nauka, Moscow, 1974) [in Russian].
G. Blyholder, J. Phys. Chem. 68, 2772 (1964).
G. Doyen and G. Ertl, Surf. Sci. 43, 197 (1974).
J. Küpers, Surf. Sci. 36, 53 (1973).
K. A. Gscheidner, Jr., J. Less-Common Met. 17, 13 (1969).
Author information
Authors and Affiliations
Corresponding author
Additional information
Original Russian Text © M.V. Kuz’min, M.A. Mittsev, 2014, published in Fizika Tverdogo Tela, 2014, Vol. 56, No. 12, pp. 2457–2463.
Rights and permissions
About this article
Cite this article
Kuz’min, M.V., Mittsev, M.A. Chemisorption of ammonia molecules on ytterbium nanofilms deposited on silicon Si(111) at room temperature. Phys. Solid State 56, 2548–2555 (2014). https://doi.org/10.1134/S1063783414120208
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S1063783414120208