论文标题
重组双金属核壳纳米颗粒：实时观察
Restructuring in bimetallic core-shell nanoparticles: Real time observation
论文作者
论文摘要
使用最初开发的声学技术，可以实时观察到通过溅射到底物上合成的核壳双金属纳米颗粒的形成过程。该技术使我们能够在室温下评估纳米颗粒的结构变化，而无需接触纳米颗粒或底物。在实验中，金属A的溅射后，金属B倾向于形成B壳/A核纳米颗粒。但是，在PD-AU合金系统中，合成过程中发生了显着的重组，从而形成了A壳/B核纳米颗粒。使用分子动力学模拟对形成过程进行了分析，表明这种重组发生在短时间上，而AU的高扩散性起着重要作用。
The formation process of core-shell bimetallic nanoparticles synthesized by sputtering onto a substrate is observed in real time using an originally developed acoustic technique. The technique enables us to evaluate the structural change of nanoparticles at room temperature without contacting the nanoparticles or substrate. In the experiments, the sputtering of metal A followed by metal B tended to form B-shell/A-core nanoparticles. However, in Pd-Au alloy system, notable restructuring occurred during synthesis, resulting in the formation of A-shell/B-core nanoparticles. The formation process is analyzed using the molecular dynamics simulation, revealing that this restructuring occurs on a short timescale, and high diffusivity of Au plays an important role.
