Magnetic actuation of a thermodynamically stable colloid of ferromagnetic nanoparticles in a liquid crystal.
basic_science · Level V
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- Record sourced from PubMed, PMID 27439890.
- Also identified by DOI 10.1039/c6sm00906a.
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Abstract
We report the development of a highly stable nanomaterial based on ferromagnetic nanoparticles dispersed in a thermotropic liquid crystal. The long-term colloidal stability and homogeneity were achieved through surface modification of the nanoparticles with a mixture of a dendritic oligomesogenic surfactant and hexylphosphonic acid and confirmed by optical and electron microscopy. The nanomaterial has an increased sensitivity to the magnetic field possessing collective and non-collective magneto-optical responses in contrast to the undoped LC. The effective coupling of the spherical particles with the LC director is due to the arrangement of the nanoparticles in chains.