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Alloying Behavior of Self-Assembled Noble Metal Nanoparticles

机译:自组装贵金属纳米粒子的合金化行为

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The atomic redistribution processes occurring in multiparticle nanostructures are hardly understood. To obtain a more detailed insight, we applied high-resolution microscopic, diffraction and spectroscopic characterization techniques to investigate the fine structure and elemental distribution of various bimetallic aerogels with 1:1 compositions, prepared by self-assembly of single monometallic nanoparticles. The system Au-Ag exhibited a complete alloy formation, whereas Pt-Pd aerogels formed a Pd-based network with embedded Pt particles. The assembly of Au and Pd nanoparticles resulted in a Pd-shell formation around the Au particles. This work confirms that bimetallic aerogels are subject to reorganization processes during their gel formation.
机译:几乎不了解发生在多颗粒纳米结构中的原子重新分布过程。为了获得更详细的见解,我们应用了高分辨率的显微,衍射和光谱表征技术,研究了由单单金属纳米粒子自组装制备的具有1:1成分的各种双金属气凝胶的精细结构和元素分布。 Au-Ag系统显示出完整的合金形成,而Pt-Pd气凝胶形成了带有嵌入Pt颗粒的基于Pd的网络。 Au和Pd纳米颗粒的组装导致在Au颗粒周围形成Pd-壳。这项工作证实了双金属气凝胶在其凝胶形成过程中会经历重组过程。

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