Diffusion of Gold Nanoparticles in Inverse Opals Probed by Heterodyne Dynamic Light Scattering

Giraudet C, Knoll M, Galvan Y, Süß S, Segets D, Vogel N, Rausch MH, Fröba AP (2020)

Publication Language: English

Publication Type: Journal article, Original article

Publication year: 2020

Journal

Transport in Porous Media Springer Verlag (Germany)

Book Volume: 131

Pages Range: 723-737

DOI: 10.1007/s11242-019-01364-1

Abstract

The diffusive behavior of nanoparticles inside porous materials is attracting a lot of interest in the context of understanding, modeling, and optimization of many technical processes. A very powerful technique for characterizing the diffusive behavior of particles in free media is dynamic light scattering (DLS). The applicability of the method in porous media is considered, however, to be rather difficult due to the presence of multiple sources of scattering. In contrast to most of the previous approaches, the DLS method was applied without ensuring matching refractive indices of solvent and porous matrix in the present study. To test the capabilities of the method, the diffusion of spherical gold nanoparticles within the interconnected, periodic nanopores of inverse opals was analyzed. Despite the complexity of this system, which involves many interfaces and different refractive indices, a clear signal related to the motion of particles inside the porous media was obtained. As expected, the diffusive process inside the porous sample slowed down compared to the particle diffusion in free media. The obtained effective diffusion coefficients were found to be wave vector-dependent. They increased linearly with increasing spatial extension of the probed particle concentration fluctuations. On average, the slowing-down factor measured in this work agrees within combined uncertainties with literature data.

Authors with CRIS profile

Cédric Giraudet Erlangen Graduate School in Advanced Optical Technologies Matthias Knoll Institute of Advanced Optical Technologies - Thermophysical Properties (AOT-TP) Sebastian Süß Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik Nicolas Vogel Professur für Partikelsynthese Michael Rausch Institute of Advanced Optical Technologies - Thermophysical Properties (AOT-TP) Andreas Paul Fröba Institute of Advanced Optical Technologies - Thermophysical Properties (AOT-TP)

Additional Organisation(s)

Erlangen Graduate School in Advanced Optical Technologies Exzellenz-Cluster Engineering of Advanced Materials

Involved external institutions

Universität Duisburg-Essen (UDE) DE Germany (DE)

How to cite

APA:

Giraudet, C., Knoll, M., Galvan, Y., Süß, S., Segets, D., Vogel, N.,... Fröba, A.P. (2020). Diffusion of Gold Nanoparticles in Inverse Opals Probed by Heterodyne Dynamic Light Scattering. Transport in Porous Media, 131, 723-737. https://dx.doi.org/10.1007/s11242-019-01364-1

MLA:

Giraudet, Cédric, et al. "Diffusion of Gold Nanoparticles in Inverse Opals Probed by Heterodyne Dynamic Light Scattering." Transport in Porous Media 131 (2020): 723-737.

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