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首页> 外文期刊>Chemistry: A European journal >Surface Segregated AgAu Tadpole-Shaped Nanoparticles Synthesized Via a Single Step Combined Galvanic and Citrate Reduction Reaction
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Surface Segregated AgAu Tadpole-Shaped Nanoparticles Synthesized Via a Single Step Combined Galvanic and Citrate Reduction Reaction

机译：通过单步电化和柠檬酸盐还原反应合成的表面分离的AgAu Ta形纳米颗粒

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摘要

New AgAu tadpole nanocrystals were synthesized in a one-step reaction involving simultaneous galvanic replacement between Ag nanospheres and AuCl4 (-)((aq.)) and AuCl4 (aq.)- reduction to Au in the presence of citrate. The AgAu tadpoles display nodular polycrystalline hollow heads, while their undulating tails are single crystals. The unusual morphology suggests an oriented attachment growth mechanism. Remarkably, a 1 nm thick Ag layer was found to segregate so as to cover the entire surface of the tadpoles. By varying the nature of the seeds (Au NPs), double-headed Au tadpoles could also be obtained. The effect of a number of reaction parameters on product morphology were explored, leading to new insights into the growth mechanisms and surface segregation behavior involved in the synthesis of bimetallic and anisotropic nanomaterials.
机译：在一步反应中合成了新的AgAu nano纳米晶体，该过程涉及在Ag纳米球之间同时进行电流置换，并在柠檬酸盐存在下将AuCl4（-）（（aq。））和AuCl4（aq。）-还原成Au。 AgAu display显示结节状多晶空心头，而其起伏的尾巴则为单晶。不寻常的形态表明定向附件生长机制。显着地，发现1nm厚的Ag层偏析以覆盖the的整个表面。通过改变种子（Au NPs）的性质，也可以获得双头金Au。探索了许多反应参数对产物形态的影响，从而导致对双金属和各向异性纳米材料合成中涉及的生长机理和表面偏析行为有了新的认识。

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