Size-Selected Ag Nanoparticles with Five-Fold Symmetry

Gracia Pinilla, Miguel Ángel y Ferrer, Domingo A. y Mejía Rosales, Sergio y Pérez Tijerina, Eduardo (2009) Size-Selected Ag Nanoparticles with Five-Fold Symmetry. Nanoscale Research Letters, 4 (8). pp. 896-902. ISSN 1931-7573

[img]
Vista previa
Texto
799.pdf - Versión Publicada
Available under License Creative Commons Attribution Non-commercial No Derivatives.

Download (1MB) | Vista previa

Resumen

Silver nanoparticles were synthesized using the inert gas aggregation technique. We found the optimal experimental conditions to synthesize nanoparticles at different sizes: 1.3 ± 0.2, 1.7 ± 0.3, 2.5 ± 0.4, 3.7 ± 0.4, 4.5 ± 0.9, and 5.5 ± 0.3 nm. We were able to investigate the dependence of the size of the nanoparticles on the synthesis parameters. Our data suggest that the aggregation of clusters (dimers, trimer, etc.) into the active zone of the nanocluster source is the predominant physical mechanism for the formation of the nanoparticles. Our experiments were carried out in conditions that kept the density of nanoparticles low, and the formation of larges nanoparticles by coalescence processes was avoided. In order to preserve the structural and morphological properties, the impact energy of the clusters landing into the substrate was controlled, such that the acceleration energy of the nanoparticles was around 0.1 eV/atom, assuring a soft landing deposition. High-resolution transmission electron microscopy images showed that the nanoparticles were icosahedral in shape, preferentially oriented with a five-fold axis perpendicular to the substrate surface. Our results show that the synthesis by inert gas aggregation technique is a very promising alternative to produce metal nanoparticles when the control of both size and shape are critical for the development of practical applications.

Tipo de elemento: Article
Palabras claves no controlados: Nanocrystals and nanoparticles � Structure of nanoscale materials � Stability and fragmentation of clusters � Inert gas aggregation � Silver nanoparticles
Divisiones: Centro de Innovación, Investigación y Desarrollo en Ingeniería y Tecnología
Ciencias Físico Matemáticas
Usuario depositante: Lic. Josimar Pulido
Creadores:
CreadorEmailORCID
Gracia Pinilla, Miguel ÁngelNO ESPECIFICADONO ESPECIFICADO
Ferrer, Domingo A.NO ESPECIFICADONO ESPECIFICADO
Mejía Rosales, SergioNO ESPECIFICADONO ESPECIFICADO
Pérez Tijerina, EduardoNO ESPECIFICADONO ESPECIFICADO
Fecha del depósito: 29 Abr 2019 18:40
Última modificación: 12 Jun 2019 12:33
URI: http://eprints.uanl.mx/id/eprint/15105

Actions (login required)

Ver elemento Ver elemento

Downloads

Downloads per month over past year