2009
DOI: 10.1021/jp906845u
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Elongated Gold Nanoparticles Obtained by Ion Implantation in Silica: Characterization and T-Matrix Simulations

Abstract: In this paper, Au nanoparticles obtained by ion implantation and a subsequent thermal annealing have been elongated in a privileged direction by means of a postannealing 10 MeV Si ion irradiation. The modification and splitting of the surface plasmon resonance peak were determined by optical extinction spectroscopy, changing the polarization angle of the incident light. Moreover, the extinction spectra were accurately fitted with the T-matrix method, showing a good agreement with the results obtained by transm… Show more

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Cited by 27 publications
(22 citation statements)
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“…Then, the optical spectra were fitted with T-matrix simulations, performed with Mishchenko’s T-matrix codes 49 and a procedure that we have described elsewhere 26, 55 . The bulk dielectric function values reported by Johnson and Christy 56 were used for the calculations.…”
Section: Methodsmentioning
confidence: 99%
“…Then, the optical spectra were fitted with T-matrix simulations, performed with Mishchenko’s T-matrix codes 49 and a procedure that we have described elsewhere 26, 55 . The bulk dielectric function values reported by Johnson and Christy 56 were used for the calculations.…”
Section: Methodsmentioning
confidence: 99%
“…Subsequently, the samples A (Ag) and A (Au) were thermally annealed under RA at 600 ∘ C. At this temperature, the sample with Ag ion implantation formed Ag-NPs [25]. On the other hand, a piece of a sample A (Au) was thermally annealed under oxidant atmosphere (OA), consisting of air at 1100 ∘ C for 1 hr (sample A (Au)-1) in order to nucleate Au-NPs inside the silica matrix [18].…”
Section: Methodsmentioning
confidence: 99%
“…142,148 Entonces, el espectro óptico fue ajustado con simulaciones de T-matrix, llevadas a cabo con los códigos de Mishchenko 149 y un proceso descrito en otras publicaciones, para comparando el modelo con resultados de TEM y SAXS para el estudio de nanopartículas de cobre y oro obtenidas por implantación en sílice 150 y utilizando el modelo y un análisis por SAXS para la elongación de nanopartículas de oro embebidas en sílice bajo irradiación con SHIs. 142 Los cálculos fueron hechos, utilizando los valores de las funciones dieléctricas reportadas por Johnson y Christy. 151 Asumimos, basado en la experiencia previa, 142,148 que las muestras contienen una mezcla de esferas pequeñas y esferoides de mayor tamaño.…”
Section: Ajuste Del Espectro óPtico: Muestras De Sílice Con Nanopartíunclassified
“…142 Los cálculos fueron hechos, utilizando los valores de las funciones dieléctricas reportadas por Johnson y Christy. 151 Asumimos, basado en la experiencia previa, 142,148 que las muestras contienen una mezcla de esferas pequeñas y esferoides de mayor tamaño. Dentro del rango de tamaños de nuestra muestra (<15 nm), la forma de la partícula afecta a la respuesta óptica mucho más que el tamaño.…”
Section: Ajuste Del Espectro óPtico: Muestras De Sílice Con Nanopartíunclassified
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