Tailoring Bimetallic Alloy Surface Properties by Kinetic Control of Self-Diffusion Processes at the Nanoscale.
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 nano...
| Publicado en: | Journal of the American Chemical Society Vol. 134; no. 40; pp. 16827 - 16834 |
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| Autores principales: | , , , , , , , , , |
| Formato: | Artículo |
| Publicado: |
American Chemical Society
10/10/2012
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| Materias: | |
| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=hlh&AN=82677143&site=ehost-live header: @attributes: shortDbName: hlh uiTerm: 82677143 longDbName: Humanities International Complete uiTag: AN controlInfo: bkinfo: jinfo: jid: 00027863 ACS jtl: Journal of the American Chemical Society issn: 00027863 maglogo: N pubinfo: dt: 10/10/2012 vid: 134 iid: 40 pid: 997 pub: American Chemical Society artinfo: ui: 82677143 10.1021/ja307294p ppf: 16827 ppct: 7 formats: tig: atl: Tailoring Bimetallic Alloy Surface Properties by Kinetic Control of Self-Diffusion Processes at the Nanoscale. aug: au: Rizzi, Michele Furlan, Sara Peressi, Maria Baldereschi, Alfonso Dri, Carlo Peronio, Angelo Africh, Cristina Lacovig, Paolo Vesselli, Erik Comelli, Giovanni affil: Physics Department, University of Trieste, Strada Costiera 11, I-34151 Trieste, Italy Institute of Theoretical Physics, École Polytechnique Fédérale de Lausanne (EPFL), CH-1O15 Lausanne, Switzerland International School for Advanced Studies (SISSA), via Bonomea 265, I-34136 Trieste, Italy IOM-CNR DEMOCRITOS, Theory@Elettra Group, Trieste, Italy IOM-CNR DEMOCIUTOS, Trieste, Italy Physics Department and CENMAT, University of Trieste, via Valerio 2, I-34127 Trieste, Italy IOM-CNR Laboratorio TASC, Area Science Park, S.S. 14 km 163.5, I-34149 Basovizza (Trieste), Italy Sincrotrone Trieste S.C.p.A., Area Science Park, S.S. 14 km 163.5, I-34149 Trieste, Italy su: Self-diffusion (Solid state physics) Nanochemistry Metallography of alloys Catalysis research Nanostructured materials Metallic composites Carbon dioxide Mathematical models sug: subj: Self-diffusion (Solid state physics) Nanochemistry Metallography of alloys Catalysis research Nanostructured materials Metallic composites Carbon dioxide Mathematical models ab: 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. pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: Y dt: @attributes: year: 2012 holdings: @attributes: islocal: N |
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