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Sökning: (WFRF:(Vorobiev I.)) srt2:(2015-2019) > (2017)

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1.
  • Ukleev, V., et al. (författare)
  • Self-assembly of a binary mixture of iron oxide nanoparticles in Langmuir film : X-ray scattering study
  • 2017
  • Ingår i: Materials Chemistry and Physics. - : Elsevier BV. - 0254-0584 .- 1879-3312. ; 202, s. 31-39
  • Tidskriftsartikel (refereegranskat)abstract
    • In present study we exploited Langmuir technique to produce self-assembled arrays composed of monodisperse iron oxide nanoparticles 10 nm and 20 nm in diameter and of their binary mixture. A combination of in-situ X-ray reflectometry and Grazing-incident small-Angle X-ray scattering was used to obtain in-plane and out-of-plane structure of the arrays directly on the water surface. Surface pressure isotherms and X-ray reflectometry analysis showed that monodisperse 10 nm nanoparticles form a highly ordered monolayer, while 20 nm particles pack in three-dimensional clusters with a short-range (nearest-neighbor) correlations between the particles. In a binary mixture of 10 nm and 20 nm nano particles composed in proportion 3:1 the self-assembly process results in a structure where the monolayer of 10 nm particles is perturbed by the larger particles. Non-trivial mixing causes an enlargement of interparticle distance but keeps the symmetry of two-dimensional lattice of smaller nanoparticles. Estimation of the acting interactions and micromagnetic simulation suggest the optimal formation for monodisperse and binary ensembles.
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2.
  • Ukleev, V., et al. (författare)
  • Polarized neutron reflectometry study from iron oxide nanoparticles monolayer
  • 2017
  • Ingår i: SURFACES AND INTERFACES. - : ELSEVIER SCIENCE BV. - 2468-0230. ; 9, s. 143-146
  • Tidskriftsartikel (refereegranskat)abstract
    • We report on the polarized neutron reflectometry investigation of monolayer of magnetic iron oxide nanoparticles assembled by the Langmuir-Schaefer method. After deposition onto a solid substrate the polarized neutron reflectometry measurements in the external magnetic field were carried out. Thickness, density, roughness and in-depth resolved magnetization profile of the resulted layer were obtained from accurate fitting routine.
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Snigireva, I (2)
Vorobiev, Alexei (2)
Ukleev, V. (2)
Khassanov, A. (1)
Konovalov, O. (1)
Dudnik, M. (1)
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Dubitskiy, I. (1)
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