利用铝箔和银氨离子之间的电流置换反应快速制备了核壳结构的银-氧化铝树枝晶。通过扫描电子显微镜(SEM)、透射电子显微镜(TEM)、X 射线粉末衍射仪(XRD)对样品进行了表征。结果表明，所制备的纳米银具有面心立方结构，无定型氧化铝薄膜均匀沉积在银树枝晶上形成壳层，有效地阻止了纳米银的氧化，提高了其稳定性。该制备方法简便易行、环境友好，且无需外加还原剂和保护剂。
This paper presented a rapid growth method to synthesize Ag@Al2 O3 core/shell nanodendrites (NDs) crystals on Al foil through an electroless galvanic displacement reaction between Al foil and [Ag(NH3 )2 ]+ ion. The morphology and structures of the as-synthesized Ag@Al2 O3 nanodendrities were characterized by means of scanning electron microscopy (SEM),transmission electron microscopy (TEM)and X-ray powder diffraction (XRD).The results showed that the as-synthesized surface modified Ag nanodendrites exhibited a face centered cubic crystalline structure.The presence of a uniform thin film of Al2 O3 ,depositing on the surface of Ag NDs could prevent its possible oxidation and help maintaining the dendrites shape.This synthesis method was facile and environmental friendly without using any additional reductant or capping agent.
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