4.7 Article

Responsive Single-Chain/Colloid Composite Janus Nanoparticle

Journal

MACROMOLECULES
Volume 53, Issue 6, Pages 2264-2270

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/acs.macromol.0c00109

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Funding

  1. National Natural Science Foundation of China [51833005]

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A facile approach is reported toward a thermoresponsive single-chain/colloid composite Janus nanoparticle by the termination of the corresponding anionic living single polymer chain onto the chlorine-capped Fe3O4 nanoparticle. Poly(2-(2-methoxyethoxy) ethyl methacrylate) (PMEO(2)MA) is selected as an example of a thermoresponsive polymer, which can be easily synthesized by anionic living polymerization. The Janus nanoparticle serves as a highly effective thermoresponsive solid surfactant, which can be manipulated with a magnet. The Janus/hydrophobic reversible transition can be triggered by near-infrared (NIR) irradiation to occur at a lower surrounding temperature owing to the photothermal effect of Fe3O4 nanoparticle. Integration of thermal response from PMEO(2)MA and paramagnetic and photothermal effects from Fe3O4 within the Janus nanoparticle, a powerful tool is provided to easily control the stability and microstructure of the emulsions.

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