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Noble-metal Ag nanoparticle chains: annealing Ag/Bi superlattice nanowires in vacuum

机译:贵金属Ag纳米粒子链:在真空中退火Ag / Bi超晶格纳米线

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One-dimensional noble-metal Ag nanoparticle chains have been prepared by electrodepositing Ag/Bi superlattice nanowires in a porous anodic alumina oxide (AAO) template and following an annealing process in vacuum. It is found that Bi, as a sacrificial metal, can be removed completely after annealing at 450 degrees C with a vacuum degree of 10(-5) Torr. The regulation of particle size, shape and interparticle spacing of Ag NP chains has been realized by adjusting the segment length of the Ag/Bi superlattice nanowires and the annealing condition. With an extension of the annealing time, it is observed that Ag particles display the transform trend from ellipsoid to sphere. Our findings could inspire further investigation on the design and fabrication of metal nanoparticle chains.
机译:通过在多孔阳极氧化铝(AAO)模板中电沉积Ag / Bi超晶格纳米线并在真空中进行退火工艺,可以制备一维贵金属Ag纳米链。发现在450℃,真空度为10(-5)Torr下退火后,作为牺牲金属的Bi可以完全除去。通过调节Ag / Bi超晶格纳米线的链段长度和退火条件,可以实现Ag NP链的粒径,形状和颗粒间间距的调节。随着退火时间的延长,观察到Ag颗粒显示出从椭圆形到球形的转变趋势。我们的发现可能会激发对金属纳米粒子链设计和制造的进一步研究。

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