Cobalt nanowires

The Russell group has applied the template synthesis approach to nanoporous films generated from UV-treated PS-fo-PMMA copolymers [43, 147,233,235,241], which were pre-aligned perpendicular to the substrate by an electric field. Through direct current electrodeposition, they fabricated high-density vertical arrays of ferromagnetic cobalt nanowires (Fig. 10a) [43]. Through subsequent work, they also demonstrated the successful replication... 

The ability of the hydrophilic PAA core of the amphiphilic core-shell brushes to coordinate with different metal cations can be used for the synthesis of novel nanosized organic/inorganic hybrids or for the generation of gold clusters or cobalt nanowire [126]. 

Fig. 4 illustrates the general features of the SAXS patterns obtained from AAO membranes containing cobalt nanowires. The intensity profile from a 40V cobalt-fified AAO membrane (pore diameter 48 nm) in the face-on position is compared with that from an empty 40V membrane. There is a much more substantial modification of the SAXS pattern than expected. The peaks from the cobalt-filled membrane are displaced to slightly higher k-values the oscillatory amplitude is reduced and there is an additional broad subsidiary peak at lower k-values (k=0.033 nm ). 

Among other reports, the DNA-templated Cu nanowire fabrication by electroless metallization100 or biotemplate synthesis of 3-nm nickel and cobalt nanowires, which may find reality in biomedical applications,101 should be mentioned. 

Duan, 1., Liu, 1., Cornelius, T. W. et al. 2009. Magnetic and optical properties of cobalt nanowires fabricated in polycarbonate ion-track templates. Nuclear Instruments and Methods in Physics Research B 267 2567-2570. 

FIGURE 13.1 Scanning electron microscopy of nanoparticles (a) hydroxyapatite (b) BaTi03 (c) carbon nanotubes (d) cobalt nanowires. 

Cobalt-PPy-cobalt nanowire was electrochemically synthesized inside alumina membrane and the field-effect transistors were fabricated by patterning a gate on one side of the cobalt-PPy-cobalt nanowire [409]. The measiued output and transfer characteristics are as good as or better than PPy film field-effect transistors. The gain of the nanowire field-effect transistors could be controlled with successive electrochemical doping of the PPy segment. 

Kazadi, A., Bantu, M., Rivas, J., Zaragoza, G., Lopez-Quintela, M.A., Blanco, M.C. Influence of the synthesis parameters on the crystallization and magnetic properties of cobalt nanowires. J. Non-Cryst. Solids 287, 5-9 (2001)... 

Fabrications of arrays of nickel and cobalt nanowires have been reported through electrodeposition at constant potential (Whitney et al, 1993). In order to fabricate... 

Figure 20 Schematic diagram of a nanoporous BCP template prepared from athickfilm of PS-A-PMMA oriented with an electric field. The PMMA was removed leaving a template. Subsequent electrochemical deposition generated nanowires in a cross-linked PS matrix. On the right is a scanning electron microscopy image of cobalt nanowires electrochemically deposited in the cross-linked PS template.

Ferromagnetic cobalt nanowires elearodeposited in pores for ultrahigh-denisty storage media. ... 

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