Colloid and Polymer Science

, Volume 292, Issue 8, pp 1785–1793 | Cite as

Thermosensitive hollow Janus dumbbells

  • Fangfang Chu
  • Frank Polzer
  • Nikolai Severin
  • Yan Lu
  • Andreas Ott
  • Jürgen P. Rabe
  • Matthias Ballauff
Original Contribution


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.


Hollow microgel Thermosensitive Janus dumbbells 



The authors acknowledge financial support by the Deutsche Forschungsgemeinschaft through the Schwerpunktprogramm “Hydrogele” (SPP1259) and the SFB 951, and the Joint Lab for Structural Research at the Integrative Research Institute for the Sciences (IRIS Adlershof).

Supplementary material

396_2014_3287_MOESM1_ESM.docx (595 kb)
ESM 1 (DOCX 595 kb)


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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Fangfang Chu
    • 1
  • Frank Polzer
    • 2
  • Nikolai Severin
    • 2
  • Yan Lu
    • 1
  • Andreas Ott
    • 1
  • Jürgen P. Rabe
    • 2
  • Matthias Ballauff
    • 1
    • 2
  1. 1.Soft Matter and Functional MaterialsHelmholtz-Zentrum Berlin für Materialien und EnergieBerlinGermany
  2. 2.Department of Physics & IRIS AdlershofHumboldt-Universität zu BerlinBerlinGermany

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