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Lecadre, F., Maroun, F., Braems, I., Berthier, F., Goyhenex, C. & Allongue, P. (2013) AuNi alloy monolayer films electrodeposited on Au(111): An in situ STM study. Surf. Sci. 607 25–32. 
Added by: Richard Baschera (2016-10-21 13:38:38)   Last edited by: Richard Baschera (2016-10-21 14:01:22)
Type de référence: Article
DOI: 10.1016/j.susc.2012.08.012
Numéro d'identification (ISBN etc.): 0039-6028
Clé BibTeX: Lecadre2013
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Catégories: HORSIMN
Mots-clés: Alloy monolayer, au(111), AuNi electrodeposition, growth, immiscible metals, Monte Carlo Simulations, Ni moire pattern, ni(110), pd, phase separation, Place exchange, scanning-tunneling-microscopy, stm, stress, surface alloy, ultrathin layers
Créateurs: Allongue, Berthier, Braems, Goyhenex, Lecadre, Maroun
Collection: Surf. Sci.
Consultations : 10/475
Indice de consultation : 3%
Indice de popularité : 0.75%
In this work, we study the electrochemical deposition of NiAu monolayers on Au(111) surfaces using in situ STM. This system which is characterized by a miscibility gap at room temperature in the case of a bulk alloy is important for connectors in electronic circuits. The microstructure of the alloy is investigated as a function of the composition and the deposition rate. At intermediate Au contents and using a relatively slow alloy deposition rate, a complete phase separation on a 10 nm length scale is observed. At larger deposition rates, the alloy structure presents different phases with several characteristic length scales. For a Au content smaller than 10%, Au and Ni phase separation yields Au clusters of 1-2 nm size embedded in a Ni layer at a specific position with respect to the Ni moire pattern. This phenomenon is interpreted in light of preliminary atomic-scale simulations of the equilibrium structure of the pure Ni monolayer pattern and site-dependent total energy calculations of exchanging Ni atoms by Au. (C) 2012 Elsevier B.V. All rights reserved.
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