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Full Paper
Temperature-, pH-, and Magnetic-Field-Sensitive Hybrid Microgels
Article first published online: 6 MAR 2007
DOI: 10.1002/smll.200600590
Copyright © 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Additional Information
How to Cite
Bhattacharya, S., Eckert, F., Boyko, V. and Pich, A. (2007), Temperature-, pH-, and Magnetic-Field-Sensitive Hybrid Microgels. Small, 3: 650–657. doi: 10.1002/smll.200600590
Publication History
- Issue published online: 22 MAR 2007
- Article first published online: 6 MAR 2007
- Manuscript Received: 23 OCT 2006
- Abstract
- Article
- References
- Cited By
Keywords:
- gels;
- magnetic properties;
- magnetite;
- nanoparticles;
- polymers
Abstract
We demonstrate a simple route for the preparation of novel hybrid particles with multiple sensitivities. Aqueous polymeric microgels are modified by magnetite nanoparticles in the preparation of temperature- and pH-sensitive hybrids with a high magnetic response. Up to 15 wt % of magnetite nanoparticles are loaded into microgels. The influence of the amount of magnetite in the microgel structure on the morphology and colloidal properties is discussed. The presence of the magnetite nanoparticles in the microgel decreases its degree of swelling and shifts the volume phase-transition temperature to higher values. Nanostructured composite films with controlled morphologies can be prepared by water evaporation and deposition of the hybrid microgels on a solid substrate.