Journal
NANO LETTERS
Volume 18, Issue 3, Pages 1733-1738Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.7b04791
Keywords
Electron holography; electric discharge; ligand stabilization; magnetism; nanowires; nickel
Categories
Funding
- RTRA Sciences et Technologies pour l'Aeronautique et l'Espace
- LabEx AMADEus [ANR-10-LABX-42, ANR-10-IDEX-03-02]
- Gobierno de Aragon [E81]
- Fondo Social Europeo
- French National Research Agency [ANR-10-EQPX-38-01]
- Conseil Regional Midi-Pyrenees
- European FEDER within the CPER program
- French national project EMMA [ANR12 BS10 013 01]
- French microscopy network METSA
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Nickel is capable of discharging electric and magnetic shocks in aerospace materials thanks to its conductivity and magnetism. Nickel nanowires are especially desirable for such an application as electronic percolation can be achieved without significantly increasing the weight of the composite material. In this work, single-crystal nickel nano-wires possessing a homogeneous magnetic field are produced via a metal-organic precursor decomposition synthesis in solution. The nickel wires are 20 nm in width and 1-2 mu m in length. The high anisotropy is attained through a combination of preferential crystal growth in the < 100 > direction and surfactant templating using hexadecylamine and stearic acid. The organic template ligands protect the nickel from oxidation, even after months of exposure to ambient conditions. These materials were studied using electron holography to characterize their magnetic properties. These thin nanowires display homogeneous ferromagnetism with a magnetic saturation (517 +/- 80 emu cm(-3)), which is nearly equivalent to that of bulk nickel (557 emu cm(-3)). Nickel nanowires were incorporated into carbon composite test pieces and were shown to dramatically improve the electric discharge properties of the composite material.
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