Small Angle Scattering by Fractal Aggregates: A Numerical Investigation of the Crossover Between the Fractal Regime and the Porod Regime

Дата и время публикации : 1995-04-12T16:20:34Z

Авторы публикации и институты :
Anwar Hasmy
René Vacher
Rémi Jullien

Ссылка на журнал-издание: Ссылка на журнал-издание не найдена
Коментарии к cтатье: RevTex, 4 pages + 6 postscript figures, compressed using “uufiles”, published in Phys. Rev. B 50, 1305 (1994)
Первичная категория: cond-mat

Все категории : cond-mat

Краткий обзор статьи: Fractal aggregates are built on a computer using off-lattice cluster-cluster aggregation models. The aggregates are made of spherical particles of different sizes distributed according to a Gaussian-like distribution characterised by a mean $a_0$ and a standard deviation $sigma$. The wave vector dependent scattered intensity $I(q)$ is computed in order to study the influence of the particle polydispersity on the crossover between the fractal regime and the Porod regime. It is shown that, given $a_0$, the location $q_c$ of the crossover decreases as $sigma$ increases. The dependence of $q_c$ on $sigma$ can be understood from the evolution of the shape of the center-to-center interparticle-distance distribution function.

Category: Physics