http://www.cnr.it/ontology/cnr/individuo/prodotto/ID191638

Tailoring bimetallic alloy surface properties by kinetic control of self-diffusion processes at the nanoscale (Articolo in rivista)

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Tailoring bimetallic alloy surface properties by kinetic control of self-diffusion processes at the nanoscale (Articolo in rivista) (literal)

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Alternative label

Michele Rizzi, Sara Furlan, Maria Peressi, Alfonso Baldereschi, Carlo Dri, Angelo Peronio, Cristina Africh, Paolo Lacovig, Erik Vesselli, and Giovanni Comelli (2012)
Tailoring bimetallic alloy surface properties by kinetic control of self-diffusion processes at the nanoscale
in Journal of the American Chemical Society (Print); ACS, American chemical society, Washington, DC (Stati Uniti d'America)
(literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

Michele Rizzi, Sara Furlan, Maria Peressi, Alfonso Baldereschi, Carlo Dri, Angelo Peronio, Cristina Africh, Paolo Lacovig, Erik Vesselli, and Giovanni Comelli (literal)

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1. Physics Department, University of Trieste, Strada Costiera 11, I-34151 Trieste, Italy; 2. Institute of Theoretical Physics, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland; 3. IOM-CNR DEMOCRITOS, Theory Elettra Group, Italian Consortium on Materials Science and Technology (INSTM), Trieste, Italy; 4. IOM-CNR DEMOCRITOS, Trieste, Italy; 5. Physics Department, CENMAT, University of Trieste, via Valerio 2, I-34127 Trieste, Italy; 6. IOM-CNR Laboratorio TASC, Area Science Park, S.S. 14 km 163.5, I-34149 Basovizza (Trieste), Italy; 7. Sincrotrone Trieste S.C.p.A., Area Science Park, S.S. 14 km 163.5, I-34149 Trieste, Italy; 8. International School for Advanced Studies (SISSA), via Bonomea 265, I-34136 Trieste, Italy (literal)

Titolo

Tailoring bimetallic alloy surface properties by kinetic control of self-diffusion processes at the nanoscale (literal)

Abstract

Achieving control of the nanoscale structure of binary alloys is of paramount importance for the design of novel materials with specific properties, leading to, for example, improved reaction rates and selectivity in catalysis, tailored magnetic behavior in electronics, and controlled growth of nanostructured materials such as graphene. By means of a combined experimental and theoretical approach, we show that the complex self-diffusion mechanisms determining these key properties can be mostly defined by kinetic rather than energetic effects. We explain how in the Ni-Cu system nanoscale control of self-diffusion and segregation processes close to the surface can be achieved by finely tuning the relative concentration of the alloy constituents. This allows tailoring the material functionality and provides a clear explanation of previously observed effects involved, for example, in the growth of graphene films and in the catalytic reduction of carbon dioxide. (literal)

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