Thermosensitive hollow Janus dumbbells |
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| Authors: | Fangfang Chu Frank Polzer Nikolai Severin Yan Lu Andreas Ott Jürgen P Rabe Matthias Ballauff |
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| Institution: | 1. Soft Matter and Functional Materials, Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner-Platz 1, 14109, Berlin, Germany
2. Department of Physics & IRIS Adlershof, Humboldt-Universit?t zu Berlin, Newtonstra?e 15, 12489, Berlin, Germany
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| Abstract: | Thermosensitive hollow Janus dumbbells, consisting of two partially fused hollow poly (N-isopropylacrylamide) (PNIPAM) spheres, were prepared using dumbbell-shaped microgels as templates. One sphere has a shell completely made of PNIPAM while the other one has a hybrid shell, which is a poly(styrene-co-3-(trimethoxysilyl)propyl methacrylate) layer covered by PNIPAM. The morphology of hollow Janus dumbbells is fully characterized by cryo- and transmission electron microscopy, scanning force microscopy, and dynamic light scattering. Transmission electron microscopy demonstrates that the particles have a very narrow size distribution. The analysis by depolarized dynamic light scattering showed that the hollow Janus dumbbells exhibit a thermosensitive behavior comparable to the dumbbell-shaped microgels before the removal of the core. |
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