Yan Jianfeng, Zhu Dezhi, Xie Jiawang, Shao Yang, Xiao Wei
Department of Mechanical Engineering, Tsinghua University, Beijing, 100084, China.
Department of Material Science, Tsinghua University, Beijing, 100084, China.
Small. 2020 Jun;16(22):e2001101. doi: 10.1002/smll.202001101. Epub 2020 Apr 24.
Laser processing of gold nanorods (Au NRs) relying on light-matter interaction provides great opportunities in various potential applications. Unveiling the light-induced structure change is a crucial goal in order to control the shape and related properties for practical application. However, the internal atomic structure control of metallic NRs has long been a challenge. Here, the concept of internal atomic structure tailored with light is demonstrated and Au NRs with various internal atomic structures including point defects, twin structures, and polycrystalline nanospheres are fabricated. Experimental characterization and theoretical simulation show that light-induced localized energy deposition and dynamic stresses distribution give rise to atomic structure change. Au NRs with internal defects show enhanced potential to improve activity. The concept of light tailoring of internal atomic structure represents a promising strategy for the rational design of metallic NRs to boost wide applications.
基于光与物质相互作用的金纳米棒（Au NRs）激光加工在各种潜在应用中提供了巨大机遇。揭示光诱导的结构变化是控制其形状及相关特性以实现实际应用的关键目标。然而，长期以来，金属纳米棒的内部原子结构控制一直是一项挑战。在此，展示了利用光定制内部原子结构的概念，并制备出具有包括点缺陷、孪晶结构和多晶纳米球等各种内部原子结构的金纳米棒。实验表征和理论模拟表明，光诱导的局部能量沉积和动态应力分布会导致原子结构变化。具有内部缺陷的金纳米棒显示出增强活性的潜力。内部原子结构的光定制概念为合理设计金属纳米棒以推动广泛应用提供了一种有前景的策略。
