Tuning the aspect ratio of silver nanospheroids embedded in silica
Por:
Rodríguez-Iglesias V., Pena-Rodriguez, O, Silva-Pereyra H.G., Rodríguez-Fernández L., Cheang-Wong J.C., Crespo-Sosa A., Reyes-Esqueda J.A., Oliver A.
Publicada:
1 mar 2010
Categoría:
Atomic and Molecular Physics, and Optics
Resumen:
A method is proposed to control the aspect ratio (e) of elongated nanoparticles obtained by ion implantation in a transparent matrix. The procedure was tested for Ag spheroids in silica and we could accurately change e in the range from the maximum value obtained by the ion implantation (around 3.0 in this case) to 1.0 (spherical shape). The values of e were determined in several steps from optical extinction spectroscopy measurements, by fitting the modification and splitting of the surface plasmon resonance peak, using the T-matrix method. In the initial (maximum deformation) and final (undeformed) states, transmission electron microscopy images were obtained, showing a good agreement with the T-matrix results in both cases. © 2010 Optical Society of America.
Filiaciones:
Rodríguez-Iglesias V.:
Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, Mexico
Silva-Pereyra H.G.:
Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, Mexico
Rodríguez-Fernández L.:
Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, Mexico
Cheang-Wong J.C.:
Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, Mexico
Crespo-Sosa A.:
Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, Mexico
Reyes-Esqueda J.A.:
Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, Mexico
Oliver A.:
Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, Mexico
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