Abstract
A template-free method via self-assembly process under a magnetic field was applied for the first time to prepare cobalt nanowires with uniform linear morphology. Cobalt nanowires with an average length of 40µm and diameter of 500nm were synthesized at 80°C by a hydrothermal process in which an external 15mT magnetic field was applied. It is found that an external magnetic field can make cobalt wires one-dimensionally self-assemble with their easy magnetic axes aligned along the magnetic line of force, leading to the formation of polycrystalline cobalt nanowires. This study provides a new and facile synthesis route to prepare cobalt nanowires with a great potential for industrial applications.
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