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Issue 48, 2014
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Site-specific growth of polymers on silica rods

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Colloids specifically developed for self-assembly (SA) into advanced functional materials have rapidly become more complex, as this complexity allows for more ways to optimize both the SA process and the properties of the resulting materials. For instance, by creating ‘patchy’ particles more open structures can be achieved through directional interactions. However, the number of ways in which site-specific chemistry can be achieved on particle surfaces is still limited. Here, we show how polymer patches can be specifically grown onto only the flat end of bullet-shaped silica rods by utilizing a subtle anisotropy in surface tension and shape caused by the growth mechanism of the rods. Conversely, if the bullet-shaped silica rods are used as ‘Pickering-emulsion’ stabilizers the same surface tension effects exclusively direct the orientation of the rods into a ‘hedgehog-morphology’. Finally, we demonstrate how an external electric field can direct the particles in a ‘vectorial’ way.

Graphical abstract: Site-specific growth of polymers on silica rods

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Article information

04 Sep 2014
13 Oct 2014
First published
13 Oct 2014

Soft Matter, 2014,10, 9644-9650
Article type

Site-specific growth of polymers on silica rods

B. Peng, G. Soligno, M. Kamp, B. de Nijs, J. de Graaf, M. Dijkstra, R. van Roij, A. van Blaaderen and A. Imhof, Soft Matter, 2014, 10, 9644
DOI: 10.1039/C4SM01989J

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