CuS2‐Passivated Au-Core, Au3Cu-Shell nanoparticles analyzed by Atomistic-Resolution Cs-Corrected STEM

dc.creatorKhanal, Subarna
dc.creatorCasillas, Gilberto
dc.creatorBhattarai, Nabraj
dc.creatorVelázquez Salazar, J. Jesús
dc.creatorSantiago, Ulises
dc.creatorPonce, Arturo
dc.creatorMejía Rosales, Sergio
dc.creatorYacamán, Miguel José
dc.date2013
dc.date.accessioned2017-03-06T12:07:02Z
dc.date.available2017-03-06T12:07:02Z
dc.identifierhttp://eprints.uanl.mx/8914/1/CuS2%E2%80%90Passivated%20Au-Core%2C%20Au3Cu-Shell%20Nanoparticles%20Analyzed%20by%20Atomistic-Resolution%20Cs-Corrected%20STEM.pdf
dc.identifierKhanal, Subarna y Casillas, Gilberto y Bhattarai, Nabraj y Velázquez Salazar, J. Jesús y Santiago, Ulises y Ponce, Arturo y Mejía Rosales, Sergio y Yacamán, Miguel José (2013) CuS2‐Passivated Au-Core, Au3Cu-Shell nanoparticles analyzed by Atomistic-Resolution Cs-Corrected STEM. Langmuir, 29. pp. 9231-9239. ISSN 0743-7463
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/248193
dc.descriptionAu-core, Au3Cu-alloyed shell nanoparticles passivated with CuS2 were fabricated by the polyol method, and characterized by Cs-corrected scanning transmission electron microscopy. The analysis of the high-resolution micrographs reveals that these nanoparticles have decahedral structure with shell periodicity, and that each of the particles is composed by Au core and Au3Cu alloyed shell surrounded by CuS2 surface layer. X-ray diffraction measurements and results from numerical simulations confirm these findings. From the atomic resolution micrographs, we identified edge dislocations at the twin boundaries of the particles, as well as evidence of the diffusion of Cu atoms into the Au region, and the reordering of the lattice on the surface, close to the vertices of the particle. These defects will impact the atomic and electronic structures, thereby changing the physical and chemical properties of the nanoparticles. On the other hand, we show for the first time the formation of an ordered superlattice of Au3Cu and a self-capping layer made using one of the alloy metals. This has significant consequences on the physical mechanism that form multicomponent nanoparticles.
dc.formattext
dc.languageen
dc.relationhttp://eprints.uanl.mx/8914/
dc.rightscc_by_nc_nd
dc.subjectQ Ciencias en General
dc.subjectQC Física
dc.titleCuS2‐Passivated Au-Core, Au3Cu-Shell nanoparticles analyzed by Atomistic-Resolution Cs-Corrected STEM
dc.typeArtículos de revistas
dc.typeArtículos de revistas


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