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Particle size distribution from extinction and absorption data of metallic nanoparticles

J. Gabriela Calvillo-Vázquez, Hugo A. Guillén-Ramírez, Melissa DiazDuarte-Rodríguez, Angel Licea-Claverie, and Eugenio R. Méndez

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Abstract

We describe a method for inverting spectroscopic data of the absorption and extinction properties of colloidal samples of resonant particles. We show that, with some prior knowledge, the genetic algorithm employed is able to estimate the probability density function of particle sizes. Since the data are sensitive to the shape and material of the particles, some information about these properties can also be retrieved. The viability of the method is illustrated by inverting numerically generated data, as well as experimental data obtained with specially prepared samples of metallic nanoparticles in aqueous suspension.

© 2019 Optical Society of America

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