Zhang Wan-Cheng, Luoshan Meng-Dai, Wang Peng-Fei, Huang Chu-Yun, Wang Qu-Quan, Ding Si-Jing, Zhou Li
School of Science, Hubei University of Technology, Wuhan 430068, China.
Key Laboratory of Artificial Micro- and Nano-structures of the Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan 430072, China.
Nanomaterials (Basel). 2020 Nov 5;10(11):2207. doi: 10.3390/nano10112207.
The self-assembly process of metal nanoparticles has aroused wide attention due to its low cost and simplicity. However, most of the recently reported self-assembly systems only involve two or fewer metals. Herein, we first report a successful synthesis of self-assembled Ag@AuCu trimetal nanoplates in aqueous solution. The building blocks of multibranched AuCu alloy nanocrystals were first synthesized by a chemical reduction method. The growth of Ag onto the AuCu nanocrystals in the presence of hexadecyltrimethylammonium chloride (CTAC) induces a self-assembly process and formation of Ag@AuCu trimetal nanoplates. These nanoplates with an average side length of over 2 μm show a porous morphology and a very clear boundary with the branches of the as-prepared AuCu alloy nanocrystals extending out. The shape and density of the Ag@AuCu trimetal nanoplates can be controlled by changing the reaction time and the concentration of silver nitrate. The as-assembled Ag@AuCu nanoplates are expected to have the potential for wide-ranging applications in surface-enhanced Raman scattering (SERS) and catalysis owing to their unique structures.
金属纳米颗粒的自组装过程因其低成本和简便性而引起了广泛关注。然而，最近报道的大多数自组装体系仅涉及两种或更少的金属。在此，我们首次报道了在水溶液中成功合成自组装的Ag@AuCu三金属纳米片。首先通过化学还原法合成了多分支AuCu合金纳米晶体的构建单元。在十六烷基三甲基氯化铵（CTAC）存在下，Ag在AuCu纳米晶体上的生长引发了自组装过程并形成了Ag@AuCu三金属纳米片。这些平均边长超过2μm的纳米片呈现出多孔形态，并且与所制备的AuCu合金纳米晶体的分支延伸出的边界非常清晰。通过改变反应时间和硝酸银浓度，可以控制Ag@AuCu三金属纳米片的形状和密度。由于其独特的结构，所组装的Ag@AuCu纳米片有望在表面增强拉曼散射（SERS）和催化等广泛应用中具有潜力。
