Showing papers by "Kirill S. Napolskii published in 2007"
TL;DR: In this paper, the synthesis and investigation of Pt and Pt-Ru nanostructures templated by anodic aluminum oxide films is discussed. And a possibility to control catalytic activity of electrodeposits by means of templating is discussed as well.
67 citations
TL;DR: In this paper, the synthesis and investigation of anodic aluminum oxide (AAO) films and magnetic nanocomposites obtained by Ni electrodeposition into a porous matrix was studied.
Abstract: The present study is focused on the synthesis and investigation of anodic aluminum oxide (AAO) films and magnetic nanocomposites Ni/AAO obtained by Ni electrodeposition into porous matrix. AAO membranes and magnetic nanocomposites were investigated by HRSEM, EDX microanalysis, XRD, nitrogen capillary adsorption method, SQUID magnetometry, and polarized small-angle neutron scattering (SANS). The influence of synthesis conditions and form factor effect on the magnetic properties of nanowire arrays is reported.
31 citations
TL;DR: In this paper, the small angle polarized neutron scattering study of nickel inverse opals was carried out by templating colloidal crystals made of colloidal colloidal molecules made of the same material.
Abstract: We report the small angle polarized neutron scattering study of nickel inverse opals, prepared by templating colloidal crystals made of
23 citations
TL;DR: In this article, the magnetic and structural properties of two-dimensional spatially ordered systems of ferromagnetic nickel nanowires embedded into an Al2O3 matrix have been studied using polarized small-angle neutron scattering (polarized SANS).
Abstract: The magnetic and structural properties of two-dimensional spatially ordered systems of ferromagnetic nickel nanowires embedded into an Al2O3 matrix have been studied using polarized small-angle neutron scattering (polarized SANS). We measured the total (nuclear and magnetic) scattering I(q) as a polarization-independent scattering, the field-dependent scattering as IH(q) = I(q, H) − I(q, 0), where H is the magnetic field, and the nuclear-magnetic interference as a polarization-dependent (P) scattering ΔI(q, P). A typical scattering pattern is composed of the diffuse small-angle scattering and the Bragg peak. It is shown that the introduction of Ni into the matrix does not change the position of the Bragg peak but results in an increase of the scattering intensity both in the small-angle region and at the Bragg positions. An external magnetic field was applied perpendicular or parallel to the long dimension of the nanowires in order to reveal the anisotropic properties of the magnetic system. It is shown that, firstly, the magnetic-field-dependent scattering IH(q) provides new and principally different information as compared with the interference term ΔI(q). Secondly, two contributions to the interference term ΔI(q) (ascribed to the diffuse scattering and to the diffraction peaks) have different signs indicating different origins of the scattering objects. Thirdly, polarized SANS gives a detailed picture of the magnetization process, which could not be obtained by methods of standard magnetometry.
13 citations