Bimetallic nanomaterials are of great significance to both fundamental research and industrial applications. Their physicochemical performances are critically dependent on their architectures and electronic structures.Here, it was reported a controlled synthesis of Au/Ni bimetallic nanocrystals with different nanostructures, i.e.,dumbbell, core@shell and alloyed nanostructures in a onepot synthesis procedure. Detailed structural characterizations were conducted with the combination of transmission electron microscopy(TEM) and X-ray diffraction(XRD).Even there is a large lattice mismatch between Au and Ni,Au@Ni core@shell nanocrystals are obtained with the seeded growth method. The growth mechanism was deeply investigated. Triphenylphosphine is demonstrated to be an effective capping agent to modify the interfacial energy to form core@shell nanocrystals, and the higher temperature is proved to be a key role in obtaining alloyed nanocrystals.
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