Direct Fabrication of Au/Pd(II) Colloidal Core-Shell Nanoparticles by Pulsed Laser Ablation of Gold in PdCl2 Solution,The Journal of Physical Chemistry C

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Direct Fabrication of Au/Pd(II) Colloidal Core-Shell Nanoparticles by Pulsed Laser Ablation of Gold in PdCl2 Solution
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2015-04-22 00:00:00 , DOI: 10.1021/jp512582q
Zahra Sheykhifard ₁ , Mehdi Ranjbar ₁ , Hossein Farrokhpour ₁ , Hadi Salamati ₁

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In this study, Au/Pd(II) core-shell colloidal nanoparticles (NPs) were prepared by pulsed laser (Nd:YAG, λ = 1064 nm) ablation synthesis in solution (LASiS) of gold target in PdCl₂ solution of different concentrations. From X-ray diffraction, metallic Au, PdO, or PdCl₂ crystal phases were obtained in this process. Surface plasmon resonance investigations, by means of UV–vis spectrophotometer, revealed damping of Au peak by increasing PdCl₂ concentration. Transmission electron microscope showed the bimetallic particles are spherical core Au NPs covered by a Pd(II) shell whose thickness is dependent on PdCl₂ concentration. X-ray photoelectron spectroscopy was used for surface chemical analysis. On the basis of the results from the previously described measurements, a mechanism for Au/Pd(II) core-shell formation was given.

中文翻译：

PdCl ₂溶液中金的脉冲激光烧蚀直接制备Au / Pd（II）胶体核壳纳米粒子

在这项研究中，通过脉冲激光（Nd：YAG，λ= 1064 nm）在金靶在不同浓度的PdCl ₂溶液（LASiS）中的烧蚀合成制备了Au / Pd（II）核壳胶体纳米颗粒（NPs）。。通过X射线衍射，在该过程中获得了金属的Au，PdO或PdCl ₂晶相。通过紫外可见分光光度计进行的表面等离子体共振研究表明，通过增加PdCl _2的浓度可以衰减Au峰。透射电子显微镜显示，双金属颗粒是球形核金纳米颗粒，被Pd（II）壳覆盖，其厚度取决于PdCl ₂专注。X射线光电子能谱用于表面化学分析。基于前述测量的结果，给出了Au / Pd（II）核-壳形成的机理。

更新日期：2015-04-22

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