Abstract Monitoring the nucleation and growth of nanomaterials is a key technique for material synthesis design and control. An efficient fabrication method can be realized deeply understanding the growth mechanisms. Here, noble metal nanostructures, gold (Au) nanoparticles, silver nanostructures (Ag nanoparticles/Ag nanowires) and gold-silver alloy nanoparticles were prepared in a facile method at room temperature. The growth processes of the Au nanoparticles, Ag nanowires and Au-Ag alloy nanoparticles can be monitored real-timely through the ultraviolet visible absorption (UV–vis), dynamic light scattering (DLS) and transmission electron microscopy (TEM). It is found that the whole formation involved Digestive ripening and Ostwald ripening cooperative mechanism. Furthermore, the self-assembly growth is noticed in the oriented attachment of precursor Ag monomers into nanowires under the same synthetic conditions without external templates or rigorous conditions. This result can provide a platform to discover the underlying growth mechanism of wet-chemistry methods for metal nanostructure fabrication.

中文翻译：

---

自催化生长的金、银及其合金纳米结构的结构演变

摘要 监测纳米材料的成核和生长是材料合成设计和控制的关键技术。深入了解生长机制可以实现有效的制造方法。在这里，贵金属纳米结构、金 (Au) 纳米颗粒、银纳米结构（Ag 纳米颗粒/Ag 纳米线）和金银合金纳米颗粒在室温下以简便的方法制备。Au纳米颗粒、Ag纳米线和Au-Ag合金纳米颗粒的生长过程可以通过紫外可见吸收（UV-vis）、动态光散射（DLS）和透射电子显微镜（TEM）实时监测。发现整个形成过程涉及消化催熟和奥斯特瓦尔德催熟协同机制。此外，在没有外部模板或严格条件的相同合成条件下，前体 Ag 单体定向附着到纳米线中时注意到自组装生长。这一结果可以提供一个平台来发现湿化学方法制备金属纳米结构的潜在生长机制。