title: Magnetic actuation of a thermodynamically stable colloid of ferromagnetic nanoparticles in a liquid crystal.
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.
authors.affiliation: Research Associate, Department of Technology of Organic Compounds, State Scientific Institution "Institute for Single Crystals", NAS of Ukraine, 60 Lenin Ave., Kharkiv, Ukraine. prodanov@isc.kharkov.com max_pro@list.ru.
authors.forename: Maksym F
authors.initials: MF
authors.lastname: Prodanov
authors.forename: Oleksandr G
authors.initials: OG
authors.lastname: Buluy
authors.forename: Ekaterina V
authors.initials: EV
authors.lastname: Popova
authors.forename: Saniyat A
authors.initials: SA
authors.lastname: Gamzaeva
authors.forename: Yuriy O
authors.initials: YO
authors.lastname: Reznikov
authors.forename: Valerii V
authors.initials: VV
authors.lastname: Vashchenko