Nickel nanoparticle-decorated reduced graphene oxide/WO₃ nanocomposite – a promising candidate for gas sensing

• Ilka Simon,
• Alexandr Savitsky,
• Rolf Mülhaupt,
• Vladimir Pankov and
• Christoph Janiak

Beilstein J. Nanotechnol. 2021, 12, 343–353, doi:10.3762/bjnano.12.28

• . Magnetic measurements were carried out by using the ponderomotive method with automatized installation for measuring magnetic characteristics and for the determination of magnetic impurities in substances by nondestructive testing with a precision to 0.01%. The measurement error for the specific

• magnetization of the measured samples is equal to ±0.005 A·m2/kg, for the magnetic susceptibility of samples with known mass it is equal to ±1 × 10–11 m3/kg. P-XRD pattern of Ni@rGO obtained from a 0.5 wt % dispersion of Ni(COD)2 in [BMIm][NTf2] (space group of nickel: P63/mmc). TEM images of Ni@rGO obtained

Influence of dielectric layer thickness and roughness on topographic effects in magnetic force microscopy

• Alexander Krivcov,
• Jasmin Ehrler,
• Marc Fuhrmann,
• Tanja Junkers and
• Hildegard Möbius

Beilstein J. Nanotechnol. 2019, 10, 1056–1064, doi:10.3762/bjnano.10.106

• SPION using a Gaussian topographic profile corresponding to a SPION with a diameter of 12 nm and a lift height of 20 nm. VCPD for the electrostatic force is 0.35 V. A tip volume magnetization of 4.5·10−15 A·m2 and a specific magnetization of the SPION of 80 A·m2·kg−1 were used for calculations of the

Magnetism and magnetoresistance of single Ni–Cu alloy nanowires

• Andreea Costas,
• Camelia Florica,
• Elena Matei,
• Maria Eugenia Toimil-Molares,
• Ionel Stavarache,
• Andrei Kuncser,
• Victor Kuncser and
• Ionut Enculescu

Beilstein J. Nanotechnol. 2018, 9, 2345–2355, doi:10.3762/bjnano.9.219

• inset of Figure 5) and that indicate a magnetization reversal through movement of domain walls. This specific magnetization reversal involving a very fast moving of transversal domains walls (400 nm in about 10−9 s) in case of nanowires of 40 nm diameter has been investigated in [33] through time

Properties of Ni and Ni–Fe nanowires electrochemically deposited into a porous alumina template

• Alla I. Vorobjova,
• Dmitry L. Shimanovich,
• Kazimir I. Yanushkevich,
• Sergej L. Prischepa and
• Elena A. Outkina

Beilstein J. Nanotechnol. 2016, 7, 1709–1717, doi:10.3762/bjnano.7.163

• of 50 ± 5 nm in diameter and 25 μm in length, i.e., with an aspect ratio of 500. XRD data demonstrate the polycrystalline nature of Ni and Ni–Fe in a face-centered cubic close-packed lattice. Both fabricated materials, Ni and Ni–Fe, have shown ferromagnetic properties. The specific magnetization

• value of Ni–Fe NWs in the alumina template is higher than that of the Ni sample and bulk Ni, also the Curie temperature of the Ni–Fe sample (790 K) is higher than that of the Ni sample one or bulk Ni. Keywords: electrochemical deposition; nanowire; porous alumina template; specific magnetization

• heights is presented. The structural properties of PA/Ni and PA/Ni–Fe NWs, as well as the temperature dependence of the specific magnetization of these nanocomposites are investigated and discussed. Experimental Preparation of porous alumina template The preparation technique and the thickness of the PA

Influence of the shape and surface oxidation in the magnetization reversal of thin iron nanowires grown by focused electron beam induced deposition

• Luis A. Rodríguez,
• Lorenz Deen,
• Rosa Córdoba,
• César Magén,
• Etienne Snoeck,
• Bert Koopmans and
• José M. De Teresa

Beilstein J. Nanotechnol. 2015, 6, 1319–1331, doi:10.3762/bjnano.6.136

• magnetization reversal in such nanowires, similar to that observed in the bell-shaped profile nanowires in the same tMax range. From the information obtained in the micromagnetic simulations, one can safely infer that the dependence of HC on the thickness in Fe nanowires is directly related to the specific

• magnetization reversal mode taking place at that thickness range. While reversal modes via coherent magnetization rotation produce an increasing value of HC with the thickness, reversal modes via non-coherent magnetization rotation make HC decrease with the thickness. Extrapolating this analysis to the