Colloidally stable, magnetoresponsive liquid crystals based on clay nanosheets
| Autor: | Olena Khoruzhenko, Sabine Rosenfeldt, Sebastian Mangelsen, Stephan Förster, Volodymyr Dudko, Georg Papastavrou, Daniel Wagner, Katharina Ottermann, Wolfgang Bensch, Martin Dulle, Josef Breu |
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| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Journal of Materials Chemistry C. 9:12732-12740 |
| ISSN: | 2050-7534 2050-7526 |
| Popis: | Liquid crystalline materials found numerous applications in modern technologies due to their ability to respond to external fields. In this context, ferronematic liquid crystals are fascinating because they offer a response to weak magnetic fields in addition to electrical fields. Nevertheless, the synthesis of stable ferronematic liquid crystals represents a challenge for colloidal and synthetic chemists. In this work, we present a straight-forward strategy for directly incorporating presynthesized magnetic nanoparticles into every other interlayer of synthetic 2 : 1 layered silicates, which subsequently can be swollen to nematic phases simply by immersion into water, offering almost infinite stability. The resulting ferronematic suspension shows a sensitive response to magnetic fields. Moreover, the synthetic strategy is highly modular, enabling for variations of the magnetic nanosheets that allow for tuning the interaction between nanosheets and blocking temperature. |
| Databáze: | OpenAIRE |
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