Abstract
Controllable FePt nanowires have been synthesised by tuning the reaction conditions. The growth mechanism of the FePt nanowires was investigated by analysing the samples obtained at different reaction stages in situ. The results show that there are two steps during formation of nanowires. The first step is nuclei and assembly process, in which FePt nuclei appear and grow up to fractions of the nanowire, and then the fractions with similar lattice fringes self-assemble to wire-like morphology under surfactant driving. The first step is foremost to control one-dimensional nanomaterials. The powerful surfactant and enough assembling time are key roles. The second step is the jointing and growing process. During this step, the connected fractions join onto each other and grow into nanowires. Based on this mechanism, we can easily achieve various one-dimensional nanomaterials from nanorods to nanowires with good quality by modifying surfactant and reactive temperature.
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