Enhanced of the R6G thermal diffusivity on aggregated small gold particles

AUTOR(ES)

Jiménez Pérez, J. L., Sánchez Ramírez, J. F., Gutiérrez Fuentes, R., Cruz-Orea, A., Herrera Pérez, J. L.

FONTE

Brazilian Journal of Physics

DATA DE PUBLICAÇÃO

2006-09

RESUMO

R6G dye with gold nanoparticles was prepared in water solution. Using a thermal lens experimental setup, the thermal diffusivity of R6G in presence of gold nanoparticles with Au different concentration was measured. The results show that, the thermal diffusivity of R6G dye mixed with gold nanoparticles increases with the increase of particle metallic concentration, enhancing the thermal diffusivity in the solution. The thermal diffusivity of the samples was studied for a constant concentration of R6G dye 0.1 g/L. The diffusivities were obtained by using the thermal lens aberrant model with lasers arranged in the mismatched mode. The characteristic time constant of the transient thermal lens was obtained by fitting the theoretical expression, for transient thermal lens, to the experimental data. UV-Vis spectroscopy and TEM were used to characterize the R6G dye gold nanoparticles.

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