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The effects of wire diameter and grain size on the melting point of Ni nanowires with and without oxide capping were systematically examined. It was found that, for uncapped Ni nanowires, the melting point drops monotonically with grain size and also with the nanowire diameter; for oxide-capped Ni nanowires, the melting point rises when the nanowire diameter is decreased. Findings indicate that: (i)...
The thermal stability of Ni polycrystalline nanowires (PNWs) enclosed in Ni oxide shells has been studied via differential scanning calorimetry (DSC) and the Kissinger equation. The influences of the oxide shells and the grain size on the thermal stability of the Ni PNWs were investigated. The critical temperature (T C , the peak temperature of the DSC curve) increases as the diameter of the...
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