Faculté des sciences

Thermoresponsive hybrid microgel particles with intrinsic optical and magnetic anisotropy

Dagallier, Camille ; Dietsch, Hervé ; Schurtenberger, Peter ; Scheffold, Frank

In: Soft Matter, 2010, vol. 6, p. 2174-2177

We describe the synthesis of thermoresponsive, magnetic, optically anisotropic and orientable colloidal particles based on poly(N-isopropylacrylamide) hybrid microgels (PNIPAMs) with an embedded ellipsoidal hematite (α-Fe₂O₃) core. Our ability to orient the particles with a magnetic field is demonstrated by small angle X-ray scattering and by optical polarization microscopy. Plus

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    Summary
    We describe the synthesis of thermoresponsive, magnetic, optically anisotropic and orientable colloidal particles based on poly(N-isopropylacrylamide) hybrid microgels (PNIPAMs) with an embedded ellipsoidal hematite (α-Fe₂O₃) core. Our ability to orient the particles with a magnetic field is demonstrated by small angle X-ray scattering and by optical polarization microscopy.