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Issue 5, 2011
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Reconstruction of the 3D structure of colloidosomes from a single SEM image

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Abstract

In this paper we show how the 3-dimensional structural arrangement of particles in a colloidosome is derived from a single scanning electron microscopy (SEM) image. We exploit the fact that particles are located on the surface of a sphere to directly quantify the 3-dimensional positions of all particles from a single 2-dimensional SEM image. The 3-dimensional particle positions are used to quantify the structural arrangement of the particles by performing both a Delaunay triangulation (DT) as well as a Voronoi tessellation (VT) of the colloidosome surface, which we use to validate the procedure for determining the 3-dimensional particle positions. In addition to the DT and the VT, we calculate the radial pair correlation function g(r). We explain how the pair-distribution is modified to suit a spherical surface and how the structural order relates to similar data on colloidal films. Our results illustrate that even for a colloidosome in its ground state, the resulting ordering is short-ranged (in our case 4 particle diameters), which is in contrast to densely packed colloidal films.

Graphical abstract: Reconstruction of the 3D structure of colloidosomes from a single SEM image

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Article information


Submitted
21 Jun 2010
Accepted
26 Nov 2010
First published
10 Jan 2011

Soft Matter, 2011,7, 2033-2041
Article type
Paper

Reconstruction of the 3D structure of colloidosomes from a single SEM image

J. W. O. Salari, G. T. Jemwa, H. M. Wyss and B. Klumperman, Soft Matter, 2011, 7, 2033
DOI: 10.1039/C0SM00560F

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