Artículo
Shape-defined nanodimers by tailored heterometallic epitaxy
Autor/es | García Negrete, Carlos Andrés
Rojas Ruiz, Teresa Cristina Knappett, Benjamin R. Jefferson, David A. Wheatley, Andrew E.H. Fernández Camacho, Asunción |
Fecha de publicación | 2014 |
Fecha de depósito | 2018-12-18 |
Publicado en |
|
Resumen | The systematic construction of heterogeneous nanoparticles composed of two distinct metal domains (Au and Pt) and exhibiting a broad range of morphologically defined shapes is reported. It is demonstrated that careful Au ... The systematic construction of heterogeneous nanoparticles composed of two distinct metal domains (Au and Pt) and exhibiting a broad range of morphologically defined shapes is reported. It is demonstrated that careful Au overgrowth on Pt nanocrystal seeds with shapes mainly corresponding to cubeoctahedra, octahedra and octapods can lead to heterometallic systems whose intrinsic structures result from specific epitaxial relationships such as {111} + {111}, {200} + {200} and {220} + {220}. Comprehensive analysis shows also that nanoparticles grown from octahedral seeds can be seen as comprising of four Au tetrahedral subunits and one Pt octahedral unit in a cyclic arrangement that is similar to the corresponding one in decahedral gold nanoparticles. However, in the present case, the multi-component system is characterized by a broken five-fold rotational symmetry about the [011] axis. This set of bimetallic dimers could provide new platforms for fuel cell catalysts and plasmonic devices. |
Identificador del proyecto | CT-REGPOT2011-1-285895
PE2009-FQM-4554 TEP-217 PE2012-TEP862 CTQ2012- 32519 201460E018 |
Cita | García Negrete, C.A., Rojas Ruiz, T.C., Knappett, B.R., Jefferson, D.A., Wheatley, A.E.H. y Fernández Camacho, A. (2014). Shape-defined nanodimers by tailored heterometallic epitaxy. Nanoscale, 6, 11090-11097. |
Ficheros | Tamaño | Formato | Ver | Descripción |
---|---|---|---|---|
Shape-defined nanodimers.pdf | 797.1Kb | [PDF] | Ver/ | |