Liquid-Crystalline Elastomer-Nanoparticle Hybrids with Reversible Switch of Magnetic Memory

Johannes M. Haberl¹, Antoni Sánchez-Ferrer¹, Adriana M. Mihut^2,†, Hervé Dietsch^2,‡, Ann M. Hirt³, Raffaele Mezzenga^1,*

A stimuli-responsive material is synthesized that combines the actuation potential of liquid-crystalline elastomers with the anisotropic magnetic properties of ellipsoidal iron oxide nanoparticles. The resulting nanocomposite exhibits unique shape-memory features with magnetic information, which can be reversibly stored and erased via parameters typical of soft materials, such as high deformations, low stresses, and liquid-crystalline smectic-isotropic transition temperatures.