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

• structures in Ni nanowires, leading to magnetic moments enhanced by 25% with respect to bulk Ni. Both saturation and coercive field of the nanowire arrays are much lower than those of single nanowires (with material-related magnetic parameters selected from the best agreement between simulation and

Self-assembly mechanism of Ni nanowires prepared with an external magnetic field

• Xiaoyu Li,
• Hu Wang,
• Kenan Xie,
• Qin Long,
• Xuefei Lai and
• Li Liao

Beilstein J. Nanotechnol. 2015, 6, 2123–2128, doi:10.3762/bjnano.6.217

• aqueous solution under an external magnetic field. The self-assembly mechanism was investigated in detail. The results indicate that the self-assembly process of Ni nanowires consists of three stages: nucleation and growth, ordered alignment and self-assembly, and deposition on the surface and gaps

• between the nickel particles. The self-assembly phenomenon occurs only when nickel particles grow to a size of about 60 nm in the reaction system. This critical size, which is proposed for the first time, is very important to comprehend the self-assembly mechanism of Ni nanowires prepared with an external

• magnetic field. Keywords: chemical reduction; external magnetic field; Ni nanoparticles; Ni nanowires; self-assembly mechanism; Introduction For the past decades, ferromagnetic (e.g., Fe, Co, Ni) nanowires have raised considerable attention due to their application prospects in magnetic, optoelectronic

Preparation of Ni/Cu composite nanowires

• Hu Wang,
• Xiaoyu Li,
• Ming Li,
• Kenan Xie and
• Li Liao

Beilstein J. Nanotechnol. 2015, 6, 1268–1271, doi:10.3762/bjnano.6.130

• synthesized Ni nanowires before being used as a special template is shown in Figure 1a. Figure 1b shows the SEM image of the prepared Ni/Cu nanowires under optimal conditions that can be achieved at present. Uniform Ni/Cu composite nanowires with an average size of approximately 200 nm in diameter and 80 µm

• in length were obtained. Furthermore, no isolated spherical Ni or Cu particles are observed in Figure 1b. By contrasting Figure 1a and Figure 1b, no obvious difference in morphology can be found. SEM images of Ni nanowires and Ni/Cu composite nanowires at a high magnification are shown in Figure 1c

• and Figure 1d, respectively. It is obvious that Ni nanowires (Figure 1c) of about 200 nm in diameter with a relatively smooth surface were obtained before being used as template. Figure 1d shows the surface morphology of the Ni/Cu composite nanowires, from which a straight clubbed nanowire could be

Characterization and properties of micro- and nanowires of controlled size, composition, and geometry fabricated by electrodeposition and ion-track technology

• Maria Eugenia Toimil-Molares

Beilstein J. Nanotechnol. 2012, 3, 860–883, doi:10.3762/bjnano.3.97

• ], Bi [56], Pt [55], Bi1−xSbx [60], Bi2Te3 [58], and Ni nanowires among others. The integral of the I–t curves between the beginning of the deposition and the transition to zone 3 corresponds to the charge Qexp applied during the growth process. Assuming complete pore filling, the expected total charge

Highly ordered ultralong magnetic nanowires wrapped in stacked graphene layers

• Abdel-Aziz El Mel,
• Jean-Luc Duvail,
• Eric Gautron,
• Wei Xu,
• Chang-Hwan Choi,
• Benoit Angleraud,
• Agnès Granier and
• Pierre-Yves Tessier

Beilstein J. Nanotechnol. 2012, 3, 846–851, doi:10.3762/bjnano.3.95

• while retaining an excellent alignment. Additionally, in some cases the metal is found to be discontinuous inside the tubes [20]. In a previous study, we demonstrated the possibility to synthesize an array of aligned Ni nanowires on a patterned silicon surface [25]. In this letter we present a simple

• –Ni) nanowires were thermally annealed at 400 °C for 60 min (details concerning the selection of the annealing conditions are presented in Supporting Information File 1). Results and Discussion The SEM micrographs of the post-annealed carbon-containing nickel nanowires (Figure 2) show the organization

• nanotubes that we synthesized in a previous study by thermal annealing of Ni nanowires organized in an amorphous carbon film [29]. Thus, although the synthesis method developed in this work is completely different to the one used in our previous study [29], the nanostructures obtained with both methods