Ultrafast Laser-Induced Atomic Structure Transformation of Au Nanoparticles with Improved Surface Activity,ACS Nano

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Ultrafast Laser-Induced Atomic Structure Transformation of Au Nanoparticles with Improved Surface Activity
ACS Nano ( IF 15.8 ) Pub Date : 2021-07-27 , DOI: 10.1021/acsnano.1c02570
Dezhi Zhu ₁ , Jianfeng Yan ₁ , Jiawang Xie ₁ , Zhenwei Liang ₁ , Hailin Bai ₁

Affiliation

Metallic nanoparticles (NPs) play a significant role in nanocatalytic systems, which are important for clean energy conversion, storage, and utilization. Laser fabrication of metallic NPs relying on light–matter interactions provides many opportunities. It is essential to study the atomic structure transformation of nonactive monocrystalline metallic NPs for practical applications. The high-density stacking faults were fabricated in monocrystalline Au NPs through tuning the ultrafast laser-induced relaxation dynamics, and the thermal and dynamic stress effects on the atomic structure transformation were revealed. The atomic structure transformation mainly arises from the thermal effect, and the dynamic stress distribution induced by local energy deposition gives rise to the generation of stacking faults. Au NPs with abundant stacking faults show enhanced surface activity owing to their low coordination number. We suggest that this work expands the knowledge of laser-metallic nanomaterial interactions and provides a method for designing metallic NPs for a wide range of applications.

中文翻译：

具有改善的表面活性的金纳米粒子的超快激光诱导原子结构转变

金属纳米粒子 (NPs) 在纳米催化系统中发挥着重要作用，对清洁能源的转换、存储和利用很重要。依赖光-物质相互作用的金属纳米颗粒的激光制造提供了许多机会。研究非活性单晶金属纳米颗粒的原子结构转变对于实际应用至关重要。通过调整超快激光诱导弛豫动力学在单晶金纳米粒子中制造高密度堆垛层错，揭示了热应力和动态应力对原子结构转变的影响。原子结构转变主要由热效应引起，局部能量沉积引起的动态应力分布引起堆垛层错的产生。具有丰富堆垛层错的金纳米粒子由于配位数低而表现出增强的表面活性。我们建议这项工作扩展了激光-金属纳米材料相互作用的知识，并提供了一种设计用于广泛应用的金属纳米颗粒的方法。

更新日期：2021-08-24

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